HomeMy WebLinkAboutCIRI-ANC-CAEC ASD Rabbit Creek Elementary School 2012-EEAudit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page i Anchorage, AK
RREEPPOORRTT DDIISSCCLLAAIIMMEERR
The information contained within this report, including any attachment(s), was produced under contract to
Alaska Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be
incorporated into AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or
public information systems. AkWarm-C is a building energy modeling software developed under
contract by AHFC.
This material is based upon work supported by the Department of Energy under Award Number
DE-EE0000095. This report was prepared as an account of work sponsored by an agency of the United
States Government. Neither the United States Government nor any agency thereof, nor any of their
employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the
accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or
represents that its use would not infringe privately owned rights. Reference herein to any specific
commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not
necessarily constitute or imply its endorsement, recommendation, or favoring by the United States
Government or any agency thereof. The views and opinions of authors expressed herein do not
necessarily state or reflect those of the United States Government or any agency thereof.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page i Anchorage, AK
TTAABBLLEE OOFF CCOONNTTEENNTTSS
ACRONYMS GLOSSARY ........................................................................................................... II
EXECUTIVE SUMMARY AND PREFACE .................................................................................. 1
1.0 METHODOLOGY ............................................................................................................ 4
2.0 BUILDING DESCRIPTION .............................................................................................. 5
2.1 ENERGY MANAGEMENT POLICY AND PLANNING ....................................................... 9
2.1.1 Hours of Operation .................................................................................. 9
2.1.2 System Balancing & Duct Cleaning ......................................................... 9
2.1.3 Outside Air Requirements ....................................................................... 9
2.1.4 Season Maintenance ............................................................................... 9
3.0 UTILITY AND BENCHMARKING DATA ........................................................................ 10
3.1 SUMMARY AND BENCHMARKING DATA ................................................................... 10
3.2 ELECTRICITY ....................................................................................................... 11
3.3 NATURAL GAS ..................................................................................................... 13
4.0 ENERGY CONSERVATION OPPORTUNITIES ............................................................ 14
AAPPPPEENNDDIICCEESS
APPENDIX A – REALS BENCHMARKING DATA FORM ....................................................... A-1
APPENDIX B – ECO CALCULATIONS ................................................................................... B-1
APPENDIX C – MAJOR EQUIPMENT SURVEY .................................................................... C-1
APPENDIX D – THERMAL IMAGE REPORT ......................................................................... D-1
APPENDIX E – ASHRAE LEVEL II DESCRIPTION ................................................................ E-1
LLIISSTT OOFF TTAABBLLEESS
Table ES.1: Energy Cost Summary 2010 .................................................................................................... 2
Table ES.2: ECO Summary ......................................................................................................................... 3
Table 2.1: Envelope Summary ..................................................................................................................... 6
Table 3.1: Energy Performance Summary 2010 ....................................................................................... 10
Table 3.2: Energy and Cost Indices 2010 .................................................................................................. 10
Table 3.3: Electrical Demand Summary 2010 ........................................................................................... 10
Table 3.4: Index Comparison (CBECS 2003) ............................................................................................ 11
Table 4.1: ECO Summary .......................................................................................................................... 14
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page ii Anchorage, AK
AACCRROONNYYMMSS GGLLOOSSSSAARRYY
Acronym Definition
AHU Air Handling Unit
ARRA The American Recovery and Reinvestment Act
ASD Anchorage School District
ASHRAE American Society for Heating, Refrigeration and Air Conditioning Engineers
BPO Building Plant Operator
CBECS Commercial Buildings Energy Consumption Survey
CCF 100 Cubic Feet
DDC Digital Direct Control
DHW Domestic Hot Water
ECO Energy Conservation Opportunity
EIA US Energy Information Administration
EMCS Energy Management Control System
EPDM Ethylene-Propylene-Diene-Monomer
ES Elementary School
FCA Fuel Cost Adjustment
GCA Gas Cost Adjustment
GPF Gallons Per Flush
GPM Gallons Per Minute
HEU High-Efficiency Urinals
HID High Intensity Dishcharge
HP Horsepower
HPS High Pressure Sodium
HS High School
HVAC Heating, Ventilation, and Air Conditioning
HX Heat Exchanger
IES Illuminating Engineering Society
kWh Kilowatt-hour
LED Light Emitting Diode
MBH 1,000,000 BTU*Hours
OA Outside Air
PPA Purchased Power Adjustment
REAL Retrofit Energy Assessment for Loans
RSMeans An Industry Standard Cost Estimation Handbook
VAV Variable Air Volume Unit
VFD Variable Frequency Drive
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 1 Anchorage, AK
EEXXEECCUUTTIIVVEE SSUUMMMMAARRYY AANNDD PPRREEFFAACCEE
This report summarizes the results of an Ameresco Federal Solutions (Ameresco) Energy Audit of Rabbit
Creek Elementary School at 13650 Lake Otis Parkway Anchorage, Alaska 99516. The intent of this
report is to evaluate energy consumption and costs and to recommend improvements to reduce
consumption and costs. The Alaska Housing Finance Corporation (AHFC) provided funding for this
audit via the American Recovery and Reinvestment Act (ARRA) with the end goal of improving the
economy by reducing state-wide energy consumption and environmental impact.
Rabbit Creek ES, Anchorage, Alaska
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 2 Anchorage, AK
Ameresco engineers conducted an energy audit at Rabbit Creek ES in several phases during the months of
September and October 2011. The engineers were assisted primarily by Bob Holben, Anchorage School
District (ASD) Plan Constructability Examiner. Mr. Holben no longer works for ASD, but provided
valuable assistance to the Ameresco team including providing access to mechanical areas, utility data,
facility drawings, and contact with other pertinent building personnel.
This audit report identifies cost-effective system and facility modifications, alterations, additions,
retrofits, and operations adjustments. Systems investigated include heating, ventilation, and air
conditioning (HVAC), interior and exterior lighting, domestic water, motors, building envelope, and
energy management control systems (EMCS). The 53,633 square foot educational facility including
classrooms, offices, gymnasiums, and other areas are covered by this energy audit. Table ES.1
summarizes the 2010 utility cost for this facility.
Table ES.1: Energy Cost Summary 2010
Energy Type Annual Cost
Electricity $ 44,912
Natural Gas $ 48,731
Total $ 93,643
Table ES.2 lists energy conservation opportunities (ECO) with estimated cost and savings figures. ECOs
are prioritized first according to recommendation status and then by simple payback number.
Recommended ECOs are listed before not recommended ECOs and simple paybacks are listed from low
to high. Savings figures are estimated based on information available at the time of the audit and
conforming to the level of detail recommended by the American Society of Heating, Refrigerating and
Air-Conditioning Engineers (ASHRAE) Level II Audit standards. Costs are estimated based on
industry standard references and Ameresco’s experience with relevant constructed energy conservation
projects. Costs include equipment and installation.
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Ameresco Federal Solutions Rabbit Creek ES
Page 3 Anchorage, AK
Table ES.2: ECO Summary
ECO # ECO Description Annual Savings Total Cost Simple Payback
4 CFL Lighting Upgrade $ 79 $ 207 2.6
14 Install High Efficiency Toilets $ 3,637 $ 24,132 6.6
9 Variable Secondary Pumping $ 1,232 $ 12,675 10.3
15 Install High Efficiency Urinals $ 1,281 $ 13,574 10.6
16 Low Flow Faucets $ 107 $ 1,330 12.4
2 T8 Lighting Upgrade $ 3,670 $ 46,283 12.6
13 Install Higher Efficiency DHW $ 1,548 $ 23,455 15.2
5 Install Occupancy Sensors $ 1,810 $ 32,125 17.7
11 Weather-stripping $ 320 $ 7,857 24.5
10 Install Higher Efficiency Boilers $ 4,978 $ 129,171 26.0
18 Install AERCO Boiler $ 6,686 $ 177,972 26.6
1 Exterior Lighting Upgrade $ 3,088 $ 84,857 27.5
8 Premium Efficiency Motors $ 239 $ 6,671 27.9
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 4 Anchorage, AK
11..00 MMEETTHHOODDOOLLOOGGYY
Prior to the site survey, the audit team gathered information about the site including utility data for
electric and natural gas services. This data was collected in the Retrofit Energy Assessment for Loans
(REAL) Preliminary Benchmark Data Form attached in Appendix A. Analysis of utility data reveals
operational characteristics and usage trends which help identify savings measures. Historical utility data
is also useful for establishing a baseline for future savings and benchmarking Rabbit Creek ES against
similar facilities.
The first step of the site survey was a review of drawings onsite to get an overview of building
construction and mechanical design. The drawings were then compared to the actual facility during a
walkthrough of the facility which included a thorough inspection of mechanical systems, lighting,
envelope, domestic water fixtures, and other energy using equipment.
Referencing data collected from the drawings and the walkthrough, the audit team determined a series of
ECOs feasible for implementation to analysis for cost-effectiveness. These ECOs were evaluated taking
into account utility data and rates, local climate conditions, operating schedules, building occupancy, and
the condition of building systems and equipment. The audit team employs proven system simulation
techniques to model energy upgrades. Energy consumption of new equipment is based on up-to-date data
for commercially available systems.
Material costs and labor hour data is calculated from RSMeans Cost Data or other industry standards.
Recent quotes or costs from other Ameresco projects are used when available. Labor rates are based on
Davis-Bacon prevailing wage rates for the Anchorage area. Where reliable figures are available,
primarily on lighting calculations with predictable burnout rates, maintenance saving are included in
savings figures. Maintenance costs are not included in controls or mechanical upgrades. Avoided costs
of replacement are not included in these calculations.
LIMITATIONS OF STUDY
All results are dependent on the quality of input data provided, and can only act as an approximation. Not
all data could be verified and no destructive testing or investigations were undertaken. Some data may
have been incomplete. Financial ratios may vary from those forecasted. Ameresco and CAEC accept no
liability for financial loss due to ECMs that fail to meet the forecasted financial ratios.
This report is not intended to be a final design document. Budget for engineering and design of these
projects is not included in the cost estimate for each measure. Any modifications or changes made to a
building to realize the savings must be designed and implemented by licensed, experienced professionals
in their fields. All liabilities for upgrades, including but not limited to safety, design, and performance are
incumbent upon the professional(s) who prepare the design. Ameresco and Central Alaska Engineering
Company (CAEC) bear no responsibility for work performed as a result of this report.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 5 Anchorage, AK
22..00 BBUUIILLDDIINNGG DDEESSCCRRIIPPTTIIOONN
General: Rabbit Creek has approximately 16 classrooms, a library, gymnasium, multipurpose
room, and computer labs. Two relocateable classrooms are used for additional space. The
original building was constructed in 1961 with major mechanical renovations as recent as 1991.
The current total floor space is 53,633 square feet. The typical school hours are 8:00am to
4:30pm, Monday-Friday from late August through late May. Janitorial staff often occupy the
building after school hours. The average occupancy profile is 460 people during normal school
hours. Weekend use at Rabbit Creek ES is minimal.
Building Envelope: The exterior walls are 8” concrete block with 2” batt insulation. Windows
are either dual glazing, argon filled, insulated clear glass units with wood frame or they are
Glasweld panels framed in aluminum with no tinting. Exterior doors are hollow metal type either
with or without one-fourth inch (¼”) single glazing wire glass. The inverted roof is flat and
mounted over tongue and groove wooden decking with 2’’ rigid insulation under the precast
concrete surface panels. Plant growth, visible damage, and missing panels on the original roof
areas adversely affect insulation values and this roof should be replaced or repaired. Wall
insulation values exceed ASHRAE Advanced Energy Design guideline for new facilities.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 6 Anchorage, AK
Windows and doors do not meet this standard, however, no upgrades are recommended. The
roof, however, has a low insulation value that is significantly degraded due to damage and wear.
Roof replacement is not typically a self-funding ECO, but roof replacement is highly
recommended here for both occupant comfort and building system protection. The table below
summarizes the thermal resistance characteristics of building envelope components.
Table 2.1: Envelope Summary
Envelope Estimated
R–Value
Exterior Walls 21.6
Roof 12.4
Exterior Doors 1.1
Exterior Windows 1.7
Air Distribution: The building has two constant volume (CV) PACE central air handling units
(AHUs) with hot water (HW) reheat which serve the gym and multipurpose areas. Classrooms
are served by HW unit ventilators (UVs). Both the AHUs and the UVs are in fair to poor
condition. Some dampers are inoperable or partially operable condition.
Ventilation and Exhaust: Fresh outside air (OA) is brought in at both AHUs and at each unit
ventilator. Roof mounted exhaust fans (EFs) relieve air from the building. EFs do not seem to be
interlock with UV or AHU OA dampers.
Heating: HW for heating is provided by two 2657 MBH input Weil McLain Series 88 cast iron
boilers with Gordon-Platt burners. The boiler set operates as lead lag and was designed with one
fully redundant boiler. All pumping is constant volume and the secondary loop is equipped with
one lead and one stand-by pump. Primary loops have three pumps: a main loop pump, a booster
pump for boiler circulation, and a warm-up pump to avoid boiler shock from cold starting.
Heating water set-point is reset based on outside air temperature.
Cooling: Outdoor air is used for cooling in all areas.
Controls: A Honeywell pneumatic control system was originally installed and all of the
pneumatic actuators are still in place on AHU and UV dampers and valves. The actuators have
been integrated with a Siemens Apogee system, which is the standard control system throughout
the district. Both the electronic and pneumatic portions of the system are in fair shape. Controls
cabinets show signs of modification and many of the components are outdated. Pneumatic
actuators on AHU seem to have been maintained. Notes on the units indicate that diaphragms
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 7 Anchorage, AK
have been replaced recently. The pneumatic portion of system is aging, but there were no audible
leaks and pneumatics air compressor cycle times were within a normal range.
Lighting: Interior lighting consists mainly of T12 fluorescents with some classrooms upgraded to
T8. T12 lights employ multi-zone, multi-level manual switching with 2 zones and 2 lighting
levels. T8 lights employ multi-zone manual switching with 3 zones. Corridor and restroom
lighting is integrated with the security system. When the system is armed all lighting is de-
energized. When the building is occupied, these lights are controlled by manual switching or
occupancy sensors. Exterior lighting consists primarily of 100W HPS wall mounts controlled by
a roof mounted photocell. Parking lot pole lamps are 400W high pressure sodium (HPS)
controlled by photocell. Exterior lighting is also integrated with the security system and is
scheduled to shut off at 11:00pm.
Process Loads and Miscellaneous Equipment: A kitchen also contributes to energy
consumption and heat load. Computer load is typical for educational building.
Domestic Water: Domestic hot water is used in classrooms, lavatories, and the kitchen. Hot
water is provided indirectly from the heating HW loop via a 119 gallon storage tank with a built
in heat exchanger. DHW circulating pumps are connected to demand sensors. Plumbing fixtures
include 1.6 gallons per flush (gpf) toilets, 1.5 gallons per minute (gpm) lavatory sinks, 2.2 gpm
classroom sinks, and 0.5 gpm lavatory sinks.
Pictures of general equipment and building conditions follow this section. A list of major mechanical
equipment is available in Appendix C.
Thermal imaging of the building envelope can provide information about its condition. The building
exterior was scanned using a handheld thermal imager during the site walkthrough. Pictures provided
are meant to provide a sample representative of windows, doors, and roofing on the building shell to give
general feedback about conductive and convective heat loss. Pictures are not meant to be used to find
specific problem areas and therefore exact locations are not discussed. Images captured during the scan
are shown in Appendix D.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 8 Anchorage, AK
Equipment Photos
113 Boiler Room - Heating Water Boilers 113 Boiler Room - Indirect DHW
200 Fan Room - Typical AHU 113 Boiler Room - Pneumatic Control System
113 Boiler Room - Heating Water Pumps Classroom Radiator
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Ameresco Federal Solutions Rabbit Creek ES
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22..11 EENNEERRGGYY MMAANNAAGGEEMMEENNTT PPOOLLIICCYY AANNDD PPLLAANNNNIINNGG
22..11..11 HHoouurrss ooff OOppeerraattiioonn
Areas of the building are leased for various activities, year round. In years 2009 and 2010 these activities,
known as ‘Rentals’, began as early as 6:45am and closed as late as 11:59pm Monday through Friday.
This accounted for a substantial number of hours per week of extra occupancy. It is Ameresco’s
understanding that the renters of these areas do not pay directly for their energy use. It could be
advantageous for ASD to reevaluate Rentals prices to ensure ASD utility costs are covered.
22..11..22 SSyysstteemm BBaallaanncciinngg && DDuucctt CClleeaanniinngg
System air balance and the condition of ductwork were not inspected by Ameresco. Air balancing can
greatly improve occupant comfort, and as part of a re-commissioning project has been consistently shown
to save 5% to 20% of HVAC energy consumption. A preliminary air-balance assessment would be able
to determine if Rabbit Creek ES is a good candidate for re-commissioning.
22..11..33 OOuuttssiiddee AAiirr RReeqquuiirreemmeennttss
Air change over requirements can be verified by referring to building equipment design drawings.
22..11..44 SSeeaassoonn MMaaiinntteennaannccee
As seasons change, it is important to ensure that the some equipment for the coming season is shut down
for energy savings of maintenance. At Rabbit Creek, both roofing tiles removed for summer PMs and
heat trace are concerns. Additional programming and hardware could be added to create an alarm if the
heat trace is enabled when OA is above a certain setpoint or on certain dates.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 10 Anchorage, AK
33..00 UUTTIILLIITTYY AANNDD BBEENNCCHHMMAARRKKIINNGG DDAATTAA
33..11 SSUUMMMMAARRYY AANNDD BBEENNCCHHMMAARRKKIINNGG DDAATTAA
Rabbit Creek Elementary School utilizes electricity and natural gas services. Electricity is provided by
the Chugach Electric Association. Natural Gas is supplied by ENSTAR Natural Gas. Natural gas is used
primarily in boilers for hydronic space heating and indirect domestic hot water (DHW) heating via heat
exchangers with the boiler system.
The tables below summarize the annual utility consumption of the site.
Table 3.1: Energy Performance Summary 2010
Energy Type Total Annual Use Units Conversion kBtu Annual Cost
Electricity 401,070 kWh 3.413 kBtu/kWh 1,368,852 $ 44,912
Natural Gas 55,775 Therm 100 kBtu/Therm 55,775,00 $ 48,731
1,424,627 $ 93,643
Table 3.2: Energy and Cost Indices 2010
Index Value Units
Energy Utilization Index 129.5 kBtu/sq ft
Energy Cost Index 1.75 $/sq ft
Table 3.3: Electrical Demand Summary 2010
Index Month kW W/sq ft
Maximum Demand Dec 128.4 2.391
Minimum Demand August 115.2 2.145
Benchmarking the site’s energy consumption per square foot to facilities in the US Energy Information
Administration’s (EIA) Commercial Buildings Energy Consumption Survey (CBECS) database gives an
estimate of the site’s energy efficiency. Benchmarking comparisons are shown in Table 3.4 on the
following page.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 11 Anchorage, AK
Table 3.4: Index Comparison (CBECS 2003)
Category Total
kBtu/sq ft
Elec
kBtu/sq ft
Nat Gas
kBtu/sq ft
Rabbit Creek ES 127.5 24.7 102.8
50,001 to 100,000 sq ft 83.8 44.7 36.5
Education 83.1 37.6 38.0
Construction Year 1960-69 90.9 40.6 45.3
Zone 1 - 50,001 to 100,000 sq ft 100.8 40.3 54.0
Zone 1 - Education 91.6 28.0 54.6
Zone 1 - Construction Year 1960-69 108.0 37.9 62.0
Rabbit Creek has an energy consumption rate that is substantially higher than surveyed educational
facilities as well as other buildings in CBECS climate zone 1. Natural gas consumption is almost double
the other averages. Electric usage is slightly below other educational facilities. The higher than typical
natural gas usage likely indicates an excess hours of operation due to inadequate control, poor overall
heating system efficiency, poor building envelope conditions, or some combination of the three.
33..22 EELLEECCTTRRIICCIITTYY
Rabbit Creek ES’s blended electricity average FY10 rate was $0.1119/kWh. For FY09 the rate was
$0.1329/kWh. The kWh consumption rate fluctuates depending on a Fuel Cost Adjustment (FCA)
and a Purchased Power Adjustment (PPA) based on the actual costs of fuel and power purchased
from other electrical generation companies. The energy rate schedule is calculated as follows as of
8/29/2011:
Basic Charge: $55.00 per meter per month
Demand Charge: $11.48/kW
Energy Charge: $0.02496/kWh
Fuel Cost Adjustment: $0.05741/kWh
Purchased Power Adjustment: $0.00575/kWh
State Tax: $0.000492/kWh
Under-grounding Charge: 2% of bill less state and local taxes
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 12 Anchorage, AK
Rabbit Creek ES FY09 and FY10 usage and cost data is presented in the figure below.
Rabbit Creek ES - Electric Consumption (kWh) vs. Electric Cost ($)
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Date (Mon - Yr)Electric Consumption (kWh)$0
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
Electric Cost ($)2009 Electric Consumption (kWh)2010 Electric Consumption (kWh)2009 Electric Cost ($)2010 Electric Cost ($)
The electric usage pattern reflects the occupancy pattern of the school year. The site does not use cooling
equipment; thus, the monthly changes in power consumption are largely due to fan, pump, and lighting
usage. The cost of electricity tracks well with usage indicating that large fluctuations of the FCA and
PPA are not common. Though the 2010 overall kWh usage was higher than 2009, costs were lower due
to lower FCA and PPA charges. Rabbit Creek ES had Rentals activity in the summer of 2010, but not
2009. The higher electric usage at Rabbit Creek ES during June and July 2010 most likely occurred for
this reason.
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Ameresco Federal Solutions Rabbit Creek ES
Page 13 Anchorage, AK
33..33 NNAATTUURRAALL GGAASS
Rabbit Creek ES’s average FY10 natural gas cost was $0.8898/Therm. The average FY09 fuel oil cost
was $1.0224/Therm. The total rate fluctuates depending on the Gas Cost Adjustment (GCA) based on
the actual costs of fuel purchased. Service HSFY09 and FY10 usage and cost data is presented in the
figure below. The natural gas rate schedule is calculated as follows:
Customer Charge: $109.00 per account per month
Base Rate: $0.1087/CCF
Gas Cost Adjustment: $0.57409/CCF (Varies)
Rabbit Creek ES - Natural Gas Consumption (CCF) vs. Natural Gas Cost ($)
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Date (Mon - Yr)Natural Gas Consumption (CCF)$0
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
$7,000
$8,000
$9,000
Natural Gas Cost ($)2009 Natural Gas Consumption (kWh)2010 Natural Gas Consumption (kWh)2009 Natural Gas Cost ($)2010 Natural Gas Cost ($)
Rabbit Creek ES had Rentals activities in the summer of 2010, but not 2009. The high gas use for the
summer months of 2010 was most likely due to summer school activity and indicates heating systems
were running.
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Ameresco Federal Solutions Rabbit Creek ES
Page 14 Anchorage, AK
44..00 EENNEERRGGYY CCOONNSSEERRVVAATTIIOONN OOPPPPOORRTTUUNNIITTIIEESS
Table 4.1 summarizes the ECOs identified during the energy audit and evaluated for implementation.
Potential ECOs for this report were identified based on observations made during the energy audit, a
review of historical energy consumption data, building drawings, and input from maintenance personnel.
These opportunities were evaluated for detailed savings, cost estimate, and life-cycle costs. Product
selections in each ECO indicate suitable and available products for Rabbit Creek ES. These products may
or may not be selected for actual implementation. The intent is to provide reasonable cost and
performance data to be used to evaluate ECO feasibility. A balance of cost and performance is
considered when selecting products. Alternative product selection options are not likely to substantially
improve simple payback numbers. A description of each energy conservation opportunity is provided in
this section.
A description of each energy conservation opportunity is also provided in this section. Table 4.1
presents total costs and annual savings for ECOs in the order they were calculated. Sequential
calculation avoids savings overlaps. For example, for this school savings from ECO 11 were calculated
using the efficiency of the new boilers from ECO 10. ECO 18 takes into account savings from ECOs 1-9
but not ECOs 10-16.
Table 4.1: ECO Summary
ECO # ECO Description Annual Savings Total Cost Simple Payback
1 Exterior Lighting Upgrade $ 3,088 $ 84,857 27.5
2 T8 Lighting Upgrade $ 3,670 $ 46,283 12.6
4 CFL Lighting Upgrade $ 79 $ 207 2.6
5 Install Occupancy Sensors $ 1,810 $ 32,125 17.7
8 Premium Efficiency Motors $ 239 $ 6,671 27.9
9 Variable Secondary Pumping $ 1,232 $ 12,675 10.3
10 Install Higher Efficiency Boilers $ 4,978 $ 129,171 26.0
11 Weather-stripping $ 320 $ 7,857 24.5
13 Install Higher Efficiency DHW $ 1,548 $ 23,455 15.2
14 Install High Efficiency Toilets $ 3,637 $ 24,132 6.6
15 Install High Efficiency Urinals $ 1,281 $ 13,574 10.6
16 Low Flow Faucets $ 107 $ 1,330 12.4
18 Install AERCO Boiler $ 6,686 $ 177,972 26.6
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Ameresco Federal Solutions Rabbit Creek ES
Page 15 Anchorage, AK
ECO 1 – Exterior Lighting Upgrade
Summary: This ECO proposes replacing existing exterior HPS lighting fixtures with high
efficiency LED fixtures via a retrofit kit for existing poles. LEDs have a higher efficacy than
HPS and are commercially available to replace outdoor building and roadway lights. These
fixtures have similar output, longer service life, and better lumen maintenance.
Recommendation: This ECO is not recommended as a stand-alone measure with a simple
payback of 27.5 years. The simple payback period is longer than the typical 15-year length of
study period for lighting upgrades. Maintenance savings due to longer life of recommended
lamps are included in this calculation.
ECO 2 –T8 Lighting Upgrade
Summary: This ECO proposes replacing existing T12 lighting fixtures with high efficiency T8
fixtures. T12 fixtures using magnetic ballasts are highly energy inefficient. Also, T12 lamps are
no longer in production and will be unavailable when warehouse reserves run out. Post-light
levels are generally nearly equal to that of the existing lighting systems and at minimum will meet
Illuminating Engineering Society (IES) guidelines for spaces renovated.
Recommendation: This ECO is recommended as a stand-alone measure with a simple payback
of 12.6 years. The simple payback period is shorter than the typical 15-year length of study
period for lighting upgrades. Maintenance savings due to longer life of recommended lamps are
included in this calculation.
ECO 4 – CFL Lighting Upgrade
Summary: This ECO proposes retrofitting the existing incandescent light bulbs with compact
fluorescent bulbs. Incandescent light bulbs installed in recessed fixtures, track lighting, utility
closets, and other general areas. Over 75% of the energy used by an incandescent light bulb is
converted into heat and is lost. Compact fluorescent light bulbs are much more efficient and can
easily replace incandescent bulbs. Post-light levels will be nearly equal to that of the existing
lighting systems or to IES standards for the present space usage, whichever is lower.
Recommendation: Applied to the buildings above, this ECO is recommended as a stand-alone
measure with a simple payback of 2.6 years. The simple payback period is less than the typical
15-year length of study period for lighting upgrades. Maintenance savings due to longer life of
recommended lamps are included in this calculation.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 16 Anchorage, AK
ECO 5 – Install Occupancy Sensors
Summary: This ECO proposes installing sensors to shut off lighting in unoccupied spaces.
Lighting systems are often left energized in unoccupied areas. Common sensing technologies
include infrared, ultrasonic, and audible sound, often combining multiple types of sensing in one
unit to avoid shutting off lights in an occupied area. Potential areas for occupancy control in this
facility include classrooms, offices, corridors, break areas, and utility closets.
Recommendation: This ECO is not recommended with a simple payback of 17.7 years. The
simple payback period is more than the typical 15-year length of study period for lighting
upgrades. This ECO was calculated assuming the installation of ECO 2. If ECO 2 is not
implemented, ECO 5 savings will increase.
ECO 8 – Premium Efficiency Motors
Summary: This ECO proposes installing National Electrical Manufacturers Association
(NEMA) premium efficiency motors to replace standard and high efficiency motors. This
replacement would cover all fan and pump motors 2HP and higher as well as select few with less
than 2 HP. Premium efficiency motors typically increase energy efficiency by 2 to 3%.
Recommendation: This ECO is not recommended with a simple payback of 27.9 years. The
simple payback period is more than the 20-year median expected life of the new motors.
Maintenance savings were not included in this calculation.
ECO 9 – Variable Secondary Pumping
Summary: This ECO proposes modifying the existing pumping configuration to a variable
secondary configuration. Existing hydronic systems use constant volume secondary loops with
three-way control valves on terminal devices. By eliminating the three-way control valves at the
terminal devices and installing VFDs on secondary loop pumps to modulate pump speed, a
significant quantity of pumping energy can be saved. This ECO assumes pump motors have been
upgraded to premium efficiency inverter duty motors.
Recommendation: This ECO is not recommended as a stand-alone measure with a simple
payback of 10.3 years. The simple payback period is slightly more than the 10-year median
expected life of the VFDs.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 17 Anchorage, AK
ECO 10 – Install Higher Efficiency Boilers
Summary: This ECO proposes replacing existing hot-water heating boilers with higher energy
efficiency units. The existing boilers are approaching the end their useful service life. Boilers
employing modern technology can be installed to reduce energy consumption, improve system
operations, and reduce maintenance costs. The current boilers operating have combustion
efficiencies of 80% whereas current generation high efficiency boilers reach 88% efficiency.
Recommendation: This ECO is not recommended with a simple payback of 26.0 years. The
simple payback period is more than the 25-year median expected life of the new boilers. Avoided
costs of replacement are included in this calculation. Total annual cost savings for this ECO are
$4,978.
ECO 11 – Weather Stripping
Summary: This ECO proposes applying weather stripping to exterior door perimeters to reduce
air infiltration into the buildings. Reducing infiltration improves building performance by
reducing envelope heat loss. Many building doors have existing weather stripping material which
is worn or missing. Replacing this weather stripping will have significant impact.
Recommendation: This ECO is not recommended with a simple payback of 24.5 years. The
simple payback period is more than the 15-year expected lifespan of the analyzed weather-
stripping. This ECO was calculated assuming the installation of ECO 10. If ECO 10 is not
implemented, ECO 11 savings will increase.
ECO 13 – Install Higher Efficiency Domestic Hot Water Heaters
Summary: This ECO proposes replacing existing domestic water heating units with higher
efficiency domestic hot water heaters. The current water heaters operating have a nominal
efficiency of 80% whereas current generation high efficiency water heaters reach up to 97%
efficiency.
Recommendation: This ECO is recommended with a simple payback of 15.2 years. The simple
payback period is less than the typical 20-year median expected life of the new hot water heaters.
Avoided costs of replacement are not included in this calculation.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 18 Anchorage, AK
ECO 14 – Install High Efficiency Toilets
Summary: This ECO proposes replacing existing standard efficiency toilets with low-flow or
high-efficiency units. Existing units are wall-mounted commercial units. These units consume
1.6-3.5 gpf and can be replaced with commercial high-efficiency models which consume as little
as 1.0 gpf.
Recommendation: Applied to the buildings above, this ECO is not recommended as a stand-
alone measure with a simple payback of 6.6 years. The simple payback is more than the 5-year
expected lifespan of the analyzed toilets.
ECO 15 – Install High Efficiency Urinals
Summary: This ECO proposes installing high-efficiency urinals (HEUs) to replace standard
water urinals. As mentioned earlier, Rabbit Creek ES employs 1.5 gpf urinals. Energy savings
can be realized by reducing water consumption and wastewater treatment costs. Using the
Caroma HEU utilizes only 0.13 gpf and is equipped with an automatic flush sensor. Where
waterless urinals have the disadvantage of having to maintain urinal cartridges, the Caroma HEU
does not.
Recommendation: This ECO is not recommended as a stand-alone measure with a simple
payback of 10.6 years. The simple payback period is longer than the typical 5-year length of
study period for domestic plumbing upgrades.
ECO 16 – Low Flow Faucets
Summary: This ECO proposes replacing existing conventional kitchen and lavatory faucets with
low-flow units to reduce water and fuel consumption. Existing units operate at 1.0-2.2 gpm or
more. New kitchen faucets will be 1.5 gpm and lavatory faucets will be 0.5 gpm. New faucets
will also have internal ceramic components, ensuring longer service life and requiring less
maintenance.
Recommendation: This ECO is not recommended as a stand-alone measure with a simple
payback of 12.4 years. The simple payback period is longer than the typical 5-year length of
study period for domestic plumbing upgrades. This ECO was calculated assuming the installation
of ECO 13. If ECO 13 is not implemented, ECO 16 savings will increase.
Audit Report Level II Energy Audit
Ameresco Federal Solutions Rabbit Creek ES
Page 19 Anchorage, AK
ECO 18 – Install AERCO Boiler
Summary: This ECO proposes replacing existing hot-water heating boilers with AERCO units.
The existing boilers are approaching the end of their useful service life. AERCO boilers
employing modern technology can be installed to reduce energy consumption, improve system
operations, and reduce maintenance costs. The current boilers operating have an average
combustion efficiency of 82.6% whereas AERCO high efficiency boilers can be expected to
obtain an annual average of approximately reach 93% efficiency in this application.
Recommendation: This ECO is not recommended with a simple payback of 26.6 years. The
simple payback period is more than the 25-year median expected life of the new boilers. Avoided
costs of replacement are included in this calculation. Annual energy savings for this ECO are
$6,686 and annualized avoided cost savings are $2166.
APPENDIX A
REALS Benchmarking
Data Form
First Name Last NameMiddle NamePhone Steven Golab348‐5132State ZipAK Monday‐Friday Saturday Sunday Holidays8‐4:30 Average # of Occupants During RenovationsDate1965 - 15985 SF Classrooms, MPR1972 - 4757 SF MPR, IMCPART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / tonOther energy Education ‐ K ‐ 1253,633Facility AddressBuilding TypeMixedCommunity PopulationFacility CityBuilding Name/ Identifier Building UsageBuilding Square FootageFacility Owned ByDateMunicipal Government/SubdivisionREAL Preliminary Benchmark Data FormPART I – FACILITY INFORMATIONFacility OwnerMOA 07/22/111961 - 7303 SF Original 1984 - 12518 Classroom, MPRTotal = 53633 SFy gy y, pypyfor the energy source.2. Provide utilities bills for the most recent two‐year period for each energy source you use.Year Built1961Rabbit Creek Elementary13650 Lake Otis Pkwy AnchorageThere is 1 other power meter assocaited with the school for lighting only ranging 35-38$/MoPrimary Operating HoursContact PersonCityAnchorage Facility Zip261,50099517EmailGolab_Steven@asdk12.orgDetailsMailing Address
Rabbit Creek ElementaryBuiding Size Input (sf) =53,6332009 Natural Gas Consumption (Therms)55,159.002009 Natural Gas Cost ($)55,5662009 Electric Consumption (kWh)387,5952009 Electric Cost ($)51,5252009 Oil Consumption (Therms)0.002009 Oil Cost ($)02009 Propane Consumption (Therms)0.002009 Propane Cost ($)0.002009 Coal Consumption (Therms)0.002009 Coal Cost ($)0.002009 Wood Consumption (Therms)0.002009 Wood Cost ($)0.002009 Thermal Consumption (Therms)0.002009 Thermal Cost ($)0.002009 Steam Consumption (Therms)0.002009 Steam Cost ($)0.002009 Total Energy Use (kBtu)6,838,7622009 Total Energy Cost ($)107,091Annual Energy Use Intensity (EUI)2009 Natural Gas (kBtu/sf) 102.82009 Electricity (kBtu/sf)24.72009 Oil (kBtu/sf) 0.02009 Propane (kBtu/sf) 0.02009 Coal (kBtu/sf) 0.02009 Wood (kBtu/sf) 0.02009 Thermal (kBtu/sf) 0.02009 Steam (kBtu/sf) 0.02009 Energy Utilization Index (kBtu/sf)127.5Annual Energy Cost Index (ECI)2009 Natural Gas Cost Index ($/sf)1.042009 Electric Cost Index ($/sf)0.962009 Oil Cost Index ($/sf)0.002009 Propane Cost Index ($/sf)0.002009 Coal Cost Index ($/sf)0.002009 Wood Cost Index ($/sf)0.002009 Thermal Cost Index ($/sf)0.002009 Steam Cost Index ($/sf)0.002009 Energy Cost Index ($/sf)2.00
2010 Natural Gas Consumption (Therms)55,775.002010 Natural Gas Cost ($)48,7312010 Electric Consumption (kWh)401,0702010 Electric Cost ($)44,9122010 Oil Consumption (Therms)0.002010 Oil Cost ($)02010 Propane Consumption (Therms)0.002010 Propane Cost ($)02010 Coal Consumption (Therms)0.002010 Coal Cost ($)02010 Wood Consumption (Therms)0.002010 Wood Cost ($)02010 Thermal Consumption (Therms)0.002010 Thermal Cost ($)02010 Steam Consumption (Therms)0.002010 Steam Cost ($)02010 Total Energy Use (kBtu)6,946,3522010 Total Energy Cost ($)93,643Annual Energy Use Intensity (EUI)2010 Natural Gas (kBtu/sf)104.02010 Electricity (kBtu/sf)25.52010 Oil (kBtu/sf)0.02010 Propane (kBtu/sf)0.02010 Coal (kBtu/sf)0.02010 Wood (kBtu/sf)0.02010 Thermal (kBtu/sf)0.02010 Steam (kBtu/sf)0.02010 Energy Utilization Index (kBtu/sf)129.5Annual Energy Cost Index (ECI)2010 Natural Gas Cost Index ($/sf)0.912010 Electric Cost Index ($/sf)0.842010 Oil Cost Index ($/sf)0.002010 Propane Cost Index ($/sf)0.002010 Coal Cost Index ($/sf)0.002010 Wood Cost Index ($/sf)0.002010 Thermal Cost Index ($/sf)0.002010 Steam Cost Index ($/sf)0.0020010 Energy Cost Index ($/sf)1.75Note:1 kWh = 3,413 Btu's1 Therm = 100,000 Btu's1 CF ≈ 1,000 Btu's
Rabbit Creek Elementary100,000Natural GasProvider Customer # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($)Enstar NGC803 Jan‐09 12/16/08 01/21/09368,0468,046$8,134$1.01Enstar NGC803 Feb‐09 01/21/09 02/20/09306,5946,594$6,683$1.01Enstar NGC803 Mar‐09 02/20/09 03/19/09276,2426,242$6,336$1.02Enstar NGC803 Apr‐09 03/19/09 04/22/09344,4524,452$4,534$1.02Enstar NGC803 May‐09 04/22/09 05/19/09273,1563,156$3,244$1.03Enstar NGC803 Jun‐09 05/19/09 06/22/09342,1942,194$2,268$1.03Enstar NGC803 Jul‐09 06/22/09 07/23/0931783783$864$1.10Enstar NGC803 Aug‐09 07/23/09 08/20/09281,5401,540$1,625$1.06Enstar NGC803 Sep‐09 08/20/09 09/22/09332,9052,905$2,986$1.03Enstar NGC803 Oct‐09 09/22/09 10/21/09294,8344,834$4,931$1.02Enstar NGC803 Nov‐09 10/21/09 11/18/09286,8116,811$6,913$1.01Enstar NGC803 Dec‐09 11/18/09 12/16/09287,6027,602$7,048$0.930Enstar NGC803Jan‐10 12/16/09 01/20/10357,6247,624$6,379$0.84Enstar NGC803 Feb‐10 01/20/10 02/18/10296,6286,628$5,558$0.84Enstar NGC803 Mar‐10 02/18/10 03/18/10286,3506,350$5,350$0.84Enstar NGC803 Apr‐10 03/18/10 04/21/10344,8044,804$4,086$0.85Enstar NGC803 May‐10 04/21/10 05/19/10283,2933,293$2,833$0.86Enstar NGC803 Jun‐10 05/19/10 06/21/10332,2462,246$1,951$0.87Enstar NGC803 Jul‐10 06/21/10 07/20/10292,0062,006$1,856$0.93Enstar NGC803 Aug‐10 07/20/10 08/23/10342,1872,187$2,194$1.00Enstar NGC803 Sep‐10 08/23/10 09/22/10302,6502,650$2,600$0.98Enstar NGC803 Oct‐10 09/22/10 10/20/10284,3764,376$4,022$0.92Enstar NGC803 Nov‐10 10/20/10 11/17/10285,7965,796$5,141$0.89Enstar NGC803 Dec‐10 11/17/10 12/15/10287,8157,815$6,761$0.87Jan ‐ 09 to Dec ‐ 09 total:55,15955,1590$55,566$0Jan ‐ 10 to Dec ‐ 10 total:55,77555,7750$48,731$0$1.02$0.89Jan ‐ 09 to Dec ‐ 09 avg:Jan ‐ 10 to Dec ‐ 10 avg:
Rabbit Creek Elementary ‐ Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)01,0002,0003,0004,0005,0006,0007,0008,0009,000Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Jul‐10Aug‐10Sep‐10Oct‐10Nov‐10Dec‐10Date (Mon ‐ Yr)Natural Gas Consumption (Therms)$0$1,000$2,000$3,000$4,000$5,000$6,000$7,000$8,000$9,000Natural Gas Cost ($)Natural GasConsumption (Therms)Natural Gas Cost ($)
Rabbit Creek ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)CEA 2833‐22202079 Jan‐09 12/30/2008 1/30/200931362421,237106 $5,567$0.150CEA 2833‐22202079 Feb‐09 1/30/2009 3/3/200932349721,194106 $5,238$0.150CEA 2833‐22202079 Mar‐09 3/3/2009 4/1/200929342411,169106 $5,060$0.150CEA 2833‐22202079 Apr‐09 4/1/2009 5/1/200930347651,187101 $5,009$0.140CEA 2833‐22202079 May‐09 5/1/2009 6/1/200931319021,089101 $4,637$0.150CEA 2833‐22202079 Jun‐09 6/1/2009 7/1/2009301910565295 $2,431$0.130CEA 2833‐22202079 Jul‐09 7/1/2009 7/31/2009301653856498 $2,130$0.130CEA 2833‐22202079 Aug‐09 7/31/2009 8/31/200931303571,03698 $3,941$0.130CEA 2833‐22202079 Sep‐09 8/31/2009 9/30/200930358971,225100 $4,302$0.120CEA 2833‐22202079 Oct‐09 9/30/2009 10/30/200930387781,323103 $4,607$0.120CEA 2833‐22202079 Nov‐09 10/30/2009 12/1/200932370451,264103 $4,377$0.120CEA 2833‐22202079 Dec‐09 12/1/2009 12/30/200929377531,289107 $4,226$0.110 CEA 2833‐22202079 Jan‐10 12/30/2009 1/29/201030384881,314107 $4,236$0.110CEA 2833‐22202079 Feb‐10 1/29/2010 3/2/201032344121,174105 $3,709$0.110CEA 2833‐22202079 Mar‐103/2/2010 4/1/201030349281,192105 $4,103$0.120CEA 2833‐22202079 Apr‐10 4/1/2010 5/3/201032345831,180105 $3,965$0.110CEA 2833‐22202079 May‐10 5/3/2010 6/2/201030338521,155104 $4,011$0.120CEA 2833‐22202079 Jun‐10 6/2/2010 7/1/20102925016854103 $2,719$0.110CEA 2833‐22202079 Jul‐10 7/1/2010 8/2/2010322121672461 $2,312$0.110CEA 2833‐22202079 Aug‐10 8/2/2010 9/4/201033299301,02295 $3,425$0.110CEA 2833‐22202079 Sep‐10 9/5/2010 10/6/201031348361,189106 $3,924$0.110CEA 2833‐22202079 Oct‐10 10/7/2010 11/8/201032369101,260110 $4,062$0.110CEA 2833‐22202079 Nov‐10 11/9/2010 12/9/201030390951,334111 $4,264$0.110CEA 2833‐22202079 Dec‐10 12/10/2010 1/11/2012397378041,290114 $4,182$0.110Jan ‐ 09 to Dec ‐ 09 total:38759513,2291224$51,5250Jan ‐ 10 to Dec ‐ 10 total:40107013,6891226$44,9120$0.13$0.11Jan ‐ 09 to Dec ‐ 09 avg:Jan ‐ 10 to Dec ‐ 10 avg:
Rabbit Creek Elementary ‐ Electric Consumption (kWh) vs. Electric Cost ($)050001000015000200002500030000350004000045000Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Jul‐10Aug‐10Sep‐10Oct‐10Nov‐10Dec‐10Date (Mon ‐ Yr)Electric Consumption (kWh)$0$1,000$2,000$3,000$4,000$5,000$6,000Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)
APPENDIX B
ECO Calculations
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 01.Rabbit Creek ElementaryECO Description:Exterior Lighting (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykWkW $kWhkWh $CCF$ kGal$ mmBtu $68 785$ 24,102 2,136$ - -$ - - 82 2,921$ 2. Installation Cost SummaryO&M CostExisting New Labor Material167$ -$ -$ 3,088$ 5,980$ 69,449$ 9,429$ 84,857$ 3. Eliminated Operation and Maintenance Cost8 EA - - Other-$ -$ -$ -$ -$ - EA- - Other-$ -$ -$ -$ -$ 1 LS- - Other-$ -$ 167$ 167$ 167$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ Total Cost167$ 4. New Operation and Maintenance Cost2 EA 0.3 0.6 Other-$ -$ -$ -$ -$ - EA- - Other-$ -$ -$ -$ -$ 1 LS- - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ Total Cost-$ Total Cost SavingsInstallation CostsNet Labor-Hrs TradeElectric SavingsNatural Gas SavingsWater Savings Total Energy SavingsM&V CostMaterial CostNet Material CostAnnual CostAnnual O&MConstruction CostsTotal Installed CostO&M TasksUnit QtyU/MUnit Labor-HrsO&M TasksLabor Rates ($/Hr)Total Labor CostAnnual PMMaterial Cost for PMUnit Labor-HrsNet Labor-HrsNet Material CostAnnual CostTradeLabor Rates ($/Hr)Annual O&MAnnual PMUnit QtyU/MMaterial Cost for PMTotal Labor CostMaterial CostExterior LightingBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 1Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 01.Rabbit Creek Elementary5. Cost Estimate16 EA 0.8 Electrician 74$ 950$ 625$ 10,000$ 10,950$ 17 EA0.8 Electrician74$ 1,009$ 815$ 13,855$ 14,864$ 16 EA0.8 Electrician74$ 950$ 1,925$ 30,800$ 31,750$ 49 EA0.2 Electrician74$ 727$ -$ -$ 727$ 49 EA0.3 Electrician74$ 1,091$ 5$ 245$ 1,336$ Total Cost4,727$ 54,900$ 59,627$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- DailyWeeklyMonthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):30$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:75,429$ Subtotal:59,627$ Supervision, Inspection & Overhead (6.5%): 4,903$ Subcontractor Overhead & Profit (26.5%):15,801$ Design Cost (6%):4,526$ Subtotal:75,429$ Total Installed Cost:84,857$ Install 221 Watt LED systemFixture, Ballast, Lamp DisposalU/MUnit Labor-HrsDescriptionUnit QtyTotal Material CostTotal M&L CostInstall 47 Watt LED systemInstall 69 Watt LED systemTradeLabor Rates ($/Hr)Total Labor CostMaterial CostMisc WiringDutiesLabor Requirement (Hours)Inspect EquipmentRecord OperationTest OperationReportTotalExterior LightingBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 2Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 01.Rabbit Creek Elementary3. Replace 16 - 70W HPS system with 16 - 47 Watt LED system.4. Replace 17 - 100W HPS system with 17 - 69 Watt LED system.5. Replace 16 - 400W HPS system with 16 - 221 Watt LED system.Annual Demand (kW) = 134 Annual Demand (kW) = 66 Annual Demand Savings (kW) = 68 Electrical Consumption (kWh) = 47,201 Electrical Consumption (kWh) = 23,099 Electrical Savings (kWh) = 24,102 Natural Gas Consumption (Natural Gas) = - Natural Gas Consumption (Natural Gas) = - Natural Gas Savings (Natural Gas) = - Water Consumption (kGal) = - Water Consumption (kGal) = - Water Savings (kGal) =- Demand Cost =1,537$ Demand Cost =752$ Demand Cost Savings =785$ Electrical Consumption Cost =4,183$ Electrical Consumption Cost =2,047$ Electrical Cost Savings =2,136$ Natural Gas Consumption Cost =-$ Natural Gas Consumption Cost =-$ Natural Gas Cost Savings =-$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =2,921$ 1. Lighting listed for replacement is HID technology "100 W HPS".2. New lighting will be LED technology "STR LWY 2M HT 04 D SV 43K R".8. Energy Savingsa. Assumptions:b. Equations:1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) x (12 months) / (1,000)2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours)3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) x (12 months) / (1,000)4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours)5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage)6. Annual Cost Savings = (Energy Savings) x (Energy Cost)c. Calculations:Baseline Condition:Proposed Condition:Exterior LightingBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 3Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 02.Rabbit Creek ElementaryECO Description:T8 Lighting Upgrade (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykWkW $kWhkWh $CCF$ kGal$ mmBtu $175 2,011$ 16,735 1,483$ - -$ - - 57 3,494$ 2. Installation Cost SummaryO&M CostExisting New Labor Material1,096$ 919$ -$ 3,670$ 29,384$ 11,756$ 5,143$ 46,283$ 3. Eliminated Operation and Maintenance Cost44 EA 0.3 13.2 Electrician74$ 978$ -$ -$ 978$ - EA- - Electrician74$ -$ -$ -$ -$ 1 LS- - Other-$ -$ 118$ 118$ 118$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ Total Cost1,096$ 4. New Operation and Maintenance Cost37 EA 0.3 11.0 Electrician74$ 816$ -$ -$ 816$ - EA- - Electrician74$ -$ -$ -$ -$ 1 LS- - Electrician74$ -$ 103$ 103$ 103$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ Total Cost919$ Electric SavingsNatural Gas SavingsWater Savings Total Energy SavingsM&V Cost Total Cost SavingsInstallation CostsMaterial CostNet Material CostAnnual CostAnnual O&MConstruction CostsTotal Installed CostO&M TasksUnit QtyU/MUnit Labor-HrsO&M TasksLabor Rates ($/Hr)Total Labor CostAnnual PMMaterial Cost for PMNet Labor-Hrs TradeNet Material CostAnnual CostAnnual O&MAnnual PMUnit QtyU/MUnit Labor-HrsNet Labor-HrsTotal Labor CostMaterial CostMaterial Cost for PMTradeLabor Rates ($/Hr)T8 Lighting Upgrade Bldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 4Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 02.Rabbit Creek Elementary5. Cost Estimate20 EA 1.0 Electrician 74$ 1,484$ 32$ 630$ 2,114$ 104 EA1.0 Electrician74$ 7,718$ 29$ 2,991$ 10,709$ 181 EA1.0 Electrician74$ 13,432$ 22$ 3,908$ 17,340$ 4 EA1.0 Electrician74$ 297$ 19$ 75$ 372$ - EA1.0 Electrician74$ -$ 35$ -$ -$ - EA1.0 Electrician74$ -$ 24$ -$ -$ 4 EA1.0 Electrician74$ 297$ 31$ 124$ 421$ - EA1.0 Electrician74$ -$ 24$ -$ -$ 313 EA0.1 Other-$ -$ -$ -$ -$ 313 EA0.1 Other-$ -$ 5$ 1,565$ 1,565$ Total Cost23,229$ 9,294$ 32,522$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- DailyWeeklyMonthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):30$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:41,141$ Subtotal:32,522$ Supervision, Inspection & Overhead (6.5%): 2,674$ Subcontractor Overhead & Profit (26.5%):8,618$ Design Cost (6%):2,468$ Subtotal:41,141$ Total Installed Cost:46,283$ TradeLabor Rates ($/Hr)Fixture, Ballast, Lamp DisposalMisc WiringInstall 4ft 2 lamp T-8 systemInstall 4ft 1 lamp T-8 systemInstall 8ft 2 lamp T-8 systemInstall 8ft 1 lamp T-8 systemInstall 2ft 2 lamp T-8 systemInstall 2ft 1 lamp T-8 systemTotal Material CostTotal M&L CostInstall 4ft 4 lamp T-8 systemInstall 4ft 3 lamp T-8 systemU/MUnit Labor-HrsTotal Labor CostMaterial CostDescriptionUnit QtyDutiesLabor Requirement (Hours)Inspect EquipmentRecord OperationTest OperationReportTotalT8 Lighting Upgrade Bldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 5Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 02.Rabbit Creek Elementary3. Replace 20 - 4ft 4 lamp T-12 system with 20 - 4ft 4 lamp T-8 system.4. Replace 104 - 4ft 3 lamp T-12 system with 104 - 4ft 3 lamp T-8 system.5. Replace 181 - 4ft 2 lamp T-12 system with 181 - 4ft 2 lamp T-8 system.6. Replace 4 - 4ft 1 lamp T-12 system with 4 - 4ft 1 lamp T-8 system.7. Replace 0 - 8ft 2 lamp T-12 system with 0 - 8ft 2 lamp T-8 system.8. Replace 0 - 8ft 1 lamp T-12 system with 0 - 8ft 1 lamp T-8 system.9. Replace 4 - 2ft 2 lamp T-12 U system with 4 - 2ft 2 lamp T-8 system.10. Replace 0 - 2ft 1 lamp T-12 U system with 0 - 2ft 1 lamp T-8 system.Annual Demand (kW) = 450 Annual Demand (kW) = 275 Annual Demand (kW) = 175 Electrical Consumption (kWh) = 42,981 Electrical Consumption (kWh) = 26,246 Electrical Savings (kWh) = 16,735 Natural Gas Consumption (Natural Gas) = - Natural Gas Consumption (Natural Gas) = - Natural Gas Savings (Natural Gas) = - Water Consumption (kGal) = - Water Consumption (kGal) = - Water Savings (kGal) =- Demand Cost =5,164$ Demand Cost =3,153$ Demand Cost Savings =2,011$ Electrical Consumption Cost =3,809$ Electrical Consumption Cost =2,326$ Electrical Cost Savings =1,483$ Natural Gas Consumption Cost =-$ Natural Gas Consumption Cost =-$ Natural Gas Cost Savings =-$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =3,494$ 2. New lighting will be T8 technology with electronic ballast.24. Fixtures average hours per year.8. Energy Savingsa. Assumptions:1. Lighting listed for replacement is T12 technology with magnetic ballast.c. Calculations:Baseline Condition:Proposed Condition:25. Electrical consumption costs $0.088612/kWh.26. Electrical demand costs $11.48/kW.b. Equations:1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) x (12 months)/ (1,000)6. Annual Cost Savings = (Energy Savings) x (Energy Cost)2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours)3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) x (12 months) / (1,000)4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours)5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage)T8 Lighting Upgrade Bldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 6Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 04.Rabbit Creek ElementaryECO Description:CFL Lighting Upgrade (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykWkW $kWhkWh $CCF$ kGal$ mmBtu $3 38$ 315 28$ - -$ - - 1 66$ 2. Installation Cost SummaryO&M CostExisting New Labor Material28$ 14$ -$ 79$ 141$ 43$ 23$ 207$ 3. Eliminated Operation and Maintenance Cost1 EA 0.3 0.3 Electrician74$ 26$ -$ -$ 26$ - EA- - Electrician74$ -$ -$ -$ -$ 1 LS- - Electrician74$ -$ 2$ 2$ 2$ Total Cost28$ 4. New Operation and Maintenance Cost0 EA 0.3 0.1 Electrician74$ 11$ -$ -$ 11$ - EA- - Electrician74$ -$ -$ -$ -$ 1 LS- - Electrician74$ -$ 3$ 3$ 3$ Total Cost14$ Total Cost SavingsInstallation CostsNet Labor-Hrs TradeElectric SavingsNatural Gas SavingsWater Savings Total Energy SavingsM&V CostMaterial CostNet Material CostAnnual CostAnnual O&MConstruction CostsTotal Installed CostO&M TasksUnit QtyU/MUnit Labor-HrsO&M TasksLabor Rates ($/Hr)Total Labor CostAnnual PMMaterial Cost for PMUnit Labor-HrsNet Labor-HrsNet Material CostAnnual CostTradeLabor Rates ($/Hr)Annual O&MAnnual PMUnit QtyU/MMaterial Cost for PMTotal Labor CostMaterial CostCFL Lighting UpgradeBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 7Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 04.Rabbit Creek Elementary5. Cost Estimate- EA 0.3 Electrician 74$ -$ 11$ -$ -$ - EA0.3 Electrician74$ -$ 2$ -$ -$ 5 EA0.3 Electrician74$ 111$ 7$ 34$ 145$ - EA0.3 Electrician74$ -$ 5$ -$ -$ - EA0.3 Electrician74$ -$ 5$ -$ -$ Total Cost111$ 34$ 145$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- DailyWeeklyMonthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):30$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:184$ Subtotal:145$ Supervision, Inspection & Overhead (6.5%):12$ Subcontractor Overhead & Profit (26.5%):38$ Design Cost (6%):11$ Subtotal:184$ Total Installed Cost:207$ Install 20 W CFLInstall 23 W CFLU/MUnit Labor-HrsDescriptionUnit QtyRecord OperationTest OperationTotal Material CostTotal M&L CostInstall 5 W CFLInstall 13 W CFLTradeLabor Rates ($/Hr)Total Labor CostMaterial CostInstall 30 W CFLDutiesLabor Requirement (Hours)Inspect EquipmentReportTotalCFL Lighting UpgradeBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 8Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 04.Rabbit Creek Elementary5. Replace 5 - 75W Incandescent with 5 - 20 W CFL.Annual Demand (kW) = 5 Annual Demand (kW) = 1 Annual Demand Savings (kW) = 3 Electrical Consumption (kWh) = 430 Electrical Consumption (kWh) = 115 Electrical Savings (kWh) = 315 Natural Gas Consumption (Natural Gas) = - Natural Gas Consumption (Natural Gas) = - Natural Gas Savings (Natural Gas) = - Water Consumption (kGal) = - Water Consumption (kGal) = - Water Savings (kGal) =- Demand Cost =52$ Demand Cost =14$ Demand Cost Savings =38$ Electrical Consumption Cost =38$ Electrical Consumption Cost =10$ Electrical Cost Savings =28$ Natural Gas Consumption Cost =-$ Natural Gas Consumption Cost =-$ Natural Gas Cost Savings =-$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =66$ 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours)5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage)1. Lighting listed for replacement is Incandescent technology.2. New lighting will be CFL technology.10. Fixtures average 1146.6 hours per year.11. Electrical consumption costs $0.088612/kWh.12. Electrical demand costs $11.48/kW.b. Equations:1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) x (12 months) / (1,000)2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours)3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) x (12 months) / (1,000)8. Energy Savingsa. Assumptions:6. Annual Cost Savings = (Energy Savings) x (Energy Cost)c. Calculations:Baseline Condition:Proposed Condition:CFL Lighting UpgradeBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 9Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 05Rabbit Creek Elementary1. Energy & Cost Savings SummarykW kW $ kWh kWh $ mmBtu $ kGal$ mmBtu $- -$ 23,901 2,118$ - -$ - - 82 2,118$ 2. Installation Cost SummaryExisting NewLabor Material-$ 308$ -$ 1,810$ 9,183$ 19,372$ 3,569$ 32,125$ 3. Eliminated Operation and Maintenance Cost- EA- - Electrician74$ -$ -$ -$ -$ - EA- - Electrician74$ -$ -$ -$ -$ - LS- - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ -$ 4. New Operation and Maintenance Cost- EA- - Electrician74$ -$ -$ -$ -$ 83 EA0.1 4.2 Electrician74$ 308$ -$ -$ 308$ - LS- - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ - - - Electrician74$ -$ -$ -$ -$ 308$ Total CostTradeLabor Rates ($/Hr)Net Material CostAnnual CostDaily O&MAnnual PMTotal Labor CostMaterial CostMaterial Cost for PMMaterial Cost for PMTotal CostO&M TasksUnit Qty U/MUnit Labor-HrsNet Labor-HrsU/MUnit Labor-HrsNet Labor-Hrs TradeDaily O&MAnnual PMMaterial CostNet Material CostAnnual CostLabor Rates ($/Hr)Total Labor CostO&M TasksUnit QtyTotal Energy SavingsO&M CostM&V CostTotal Cost SavingsInstallation CostsConstruction CostsTotal Installed CostECO Description:Occupancy Sensors (Bldg Rabbit Creek Elementary)Applicable Building:Electric SavingsNatural Gas Savings Water SavingsInstall Occupancy SensorsBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 10Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 055. Cost Estimate14 EA 0.3 74$ Electrician 343$ 49$ 685$ 1,028$ 13 EA0.3 74$ Electrician 318$ 76$ 985$ 1,303$ 45 EA1.1 74$ Electrician 3,817$ 138$ 6,231$ 10,048$ 1 EA1.1 74$ Electrician85$ 164$ 164$ 249$ 10 EA1.1 74$ Electrician 848$ 109$ 1,090$ 1,938$ 83 EA0.3 74$ Electrician 1,848$ 74$ 6,160$ 8,008$ 7,259$ 15,314$ 22,574$ 6. Measurement and Verification Cost- Daily Weekly Monthly Quarterly Semi-Annual Annual Total 50$ - - - - - - - -$ - - - - - - - -$ - - - - - - - -$ - - - - - - - - - - - - - - 7. Project Markups-$ -$ -$ 28,555$ 22,574$ 1,856$ 5,982$ 1,713$ 28,555$ 32,125$ Subcontractor Overhead & Profit (26.5%):Design Cost (6%):Subtotal:Total Installed Cost:Subcontractor Contingency (0%):Subtotal:Subtotal:Supervision, Inspection & Overhead (6.5%):Labor Requirement (Hours)Annual Material/Equipment Cost ($):DutiesTest OperationTotal Annual M&V Cost ($):Annual Labor Requirement (Hrs):Labor Rate ($Hr):Inspect EquipmentAnnual Labor Cost ($):Total M&L CostWall Mount Passive Infrared Occ SensorTotal Labor CostTotal CostSales Tax (0%):Bond (0%):Record OperationReportTotalWall Mount Dual Technology Occ SensorCeiling Mount Passive Infrared Occ SensorCeiling Mount Dual Technology Occ SensorCorner Mount Passive Infrared Occ SensorMaterial CostTotal Material CostMisc WiringDescriptionUnit Qty U/MUnit Labor-HrsLabor Rates ($/Hr)TradeInstall Occupancy SensorsBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 11Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 05a. Assumptions:1. Spaces can have occupancy sensors installed to reduce lighting usage.2. Passive Infared (PIR) sensors are used in corridors and rooms with open floor plans.3. Dual technology sensors are used in larger rooms and areas where occupants could potentially be shielded from the PIR on the sensor.4. Percent savings estimates are from the Energy Management Handbook, Turner, 3rd Edition.b. Equations:1. Baseline Usage (kWh) = (Existing Fixture Wattage) x (Qty) x (Existing Hours) / (1,000)2. Proposed Usage (kWh) = (Existing Fixture Wattage) x (Qty) x [(Existing Hours) - (Hours Reduced)] / (1,000)3. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage)4. Annual Cost Savings = (Energy Savings) x (Energy Cost)- - - 94,470 70,569 Electrical Consumption Savings (kWh) = 23,901 - - Natural Gas Savings (CCF) =- - - Water Savings (kGal) =- -$ Demand Cost Savings =-$ 8,371$ 6,253$ Electrical Consumption Cost Savings = 2,118$ -$ -$ Natural Gas Cost Savings =-$ -$ -$ Water Cost Savings =-$ Total Cost Savings =2,118$ Electrical Consumption Cost =Electrical Consumption Cost =Natural Gas Consumption Cost =Natural Gas Consumption Cost =Natural Gas Consumption (CCF) = Natural Gas Consumption (CCF) =Demand (kW) =Demand (kW) =Water Consumption Cost =Water Consumption Cost =Water Consumption (kGal) =Water Consumption (kGal) =Demand Cost =Demand Cost =8. Energy Savingsc. Calculations:Demand Savings (kW) =Electrical Consumption (kWh) = Electrical Consumption (kWh) =Baseline Condition: Proposed Condition:Install Occupancy Sensors Bldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 12Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 08.Rabbit Creek ElementaryECO Description:Premium Efficiency Motors (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykW kW $ kWh kWh $ mmBtu $ kGal$ mmBtu $0 4$ 2,655 235$ - -$ - - 9 239$ 2. Installation Cost SummaryExisting NewLabor Material11$ 11$ -$ 239$ 751$ 5,179$ 741$ 6,671$ 3. Eliminated Operation and Maintenance Cost1 LS 0.4 0.4 Electrician30$ 11$ -$ -$ 11$ 11$ 4. New Operation and Maintenance Cost1 LS 0.4 0.4 Electrician30$ 11$ -$ -$ 11$ 11$ Material CostNet Material CostTotal CostLabor Rates ($/Hr)Total Labor CostAnnual CostAnnual PMO&M TasksUnit Qty U/MUnit Labor-HrsNet Labor-Hrs TradeNet Labor-Hrs TradeTotal CostLabor Rates ($/Hr)Total Labor CostMaterial CostNet Material CostElectric SavingsNatural Gas Savings Water SavingsM&V CostTotal Cost SavingsInstallation CostsTotal Energy SavingsAnnual CostAnnual PMO&M TasksUnit Qty U/MUnit Labor-HrsConstruction CostsTotal Installed CostO&M CostPremium MotorRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 13Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 08.Rabbit Creek Elementary5. Cost Estimate2 LS 2.0 74$ 297$ 731$ 1,462$ 1,759$ 2 LS2.0 74$ 297$ 1,316$ 2,632$ 2,929$ 594$ 4,094$ 4,688$ 6. Project Markups-$ -$ -$ 5,930$ 4,688$ 385$ 1,242$ 356$ 5,930$ 6,671$ 4. Motor load factor = 80%5. Building annual operating hours = 1,638 (95% diversity factor)6. Electrical demand costs = $11.48/kW.7. Electrical consumption costs = $0.088612/kWh.Subtotal:Supervision, Inspection & Overhead (6.5%):Subcontractor Overhead & Profit (26.5%):Design Cost (6%):7. Energy Savingsa. Assumptions:1. This ECO considers replacing existing motors with NEMA premium efficiency motors.2. Existing motors & efficiencies: (2) 2-hp @ 84%; (2) 3-hp @ 84%3. Proposed motors & efficiencies: (2) 2-hp @ 86.5%; (2) 3-hp @ 89.5%Subtotal: Total Installed Cost:Sales Tax (0%): Bond (0%):Subcontractor Contingency (0%):Labor Rates ($/Hr)Total Labor CostSubtotal:U/MUnit Labor-HrsTotal Cost3 horseMaterial CostTotal Material CostTotal M&L Cost2 horseDescriptionUnit QtyPremium MotorRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 14Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 08.Rabbit Creek Elementary7.10 6.76 0.34 Electrical Consumption (kWh) =49,790.17 Electrical Consumption (kWh) =47,135.62 2,655 Fuel Consumption (mmBtu) =- Fuel Consumption (mmBtu) =- Fuel Savings (mmBtu) =- Water Consumption (kGal) =- Water Consumption (kGal) =- Water Savings (kGal) =- Demand Cost =82$ Demand Cost =78$ Demand Cost Savings =4$ Electrical Consumption Cost =4,412$ Electrical Consumption Cost =4,177$ Electrical Consumption Cost Savings =235$ Fuel Consumption Cost =-$ Fuel Consumption Cost =-$ Fuel Cost Savings =-$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =239$ c. Calculations:Baseline Condition:Proposed Condition:Demand (kW) =Demand (kW) =Demand Savings (kW) =Electrical Consumption Savings (kWh) =2. Existing/Proposed Motor Consumption (kWh) = (Motor Demand) x (Diversity Factor) x (Annual Hours)3. kW Savings = [(Baseline kW) - ( Proposed kW)] x 124. kWh Savings = (Baseline kWh) - ( Proposed kWh)5. Energy Cost Savings = Energy Savings (kW or kWh) x (Energy Unit Cost)1. Existing/Proposed Motor Demand (kW) = (Motor HP) x (Load Factor) x (0.746 kW/HP)/ Motor Efficiencyb. Equations:Premium MotorRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 15Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 09ECO Description:Install Primary/Secondary PumpingRabbit Creek 1. Energy & Cost Savings SummarykW kW $ kWh kWh $ mmBtu $kGal$ mmBtu $18 203$ 11,618 1,030$ - -$ - - 40 1,232$ 2. Installation Cost SummaryExisting NewLabor Material-$ -$ -$ 1,232$ 6,397$ 4,870$ 1,408$ 12,675$ 3. Eliminated Operation and Maintenance CostEA0.5 - Electrician30$ -$ -$ -$ -$ - LS0.5 - Electrician30$ -$ -$ -$ -$ - LS1.0 - Electrician-$ -$ 7$ -$ -$ - - - -$ -$ -$ -$ -$ -$ 4. New Operation and Maintenance CostEA0.3 - Electrician30$ -$ -$ -$ -$ - LS0.5 - Electrician30$ -$ -$ -$ -$ - LS1.0 - Electrician-$ -$ 7$ -$ -$ - - - -$ -$ -$ -$ -$ -$ Applicable Building:Unit Labor-Hrs Net Labor-HrsTotal CostMaterial CostLabor Rates ($/Hr)Net Labor-HrsDaily O&MUnit Labor-HrsMaterial Cost for PMAnnual CostLabor Rates ($/Hr)Total Labor CostMaterial Cost Net Material CostAnnual CostTotal CostNet Material CostTotal Labor CostO&M TasksTradeAnnual PMUnit QtyWater SavingsU/MInstallation CostsTotal Cost SavingsTotal Energy SavingsAnnual PMMaterial Cost for PMTotal Installed CostTradeElectric SavingsNatural Gas SavingsM&V CostDaily O&MO&M TasksUnit QtyConstruction CostsU/MO&M CostVariable Secondary PumpingRabbit Creek Audit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 16Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 095. Cost EstimateVFD 3 HP2 EA 10.0 Electrician 74$ 1,484$ 1,000$ 2,000$ 3,484$ 1 LS30.0 Mechanical84$ 2,534$ 1,800$ 1,800$ 4,334$ 1 LS10.0 Electrician74$ 742$ 50$ 50$ 792$ 2 2.0 Electrician74$ 297$ -$ -$ 297$ Total Cost5,057$ 3,850$ 8,907$ 6. Project Markups-$ -$ -$ 11,267$ 8,907$ 732$ 2,360$ 676$ 11,267$ 12,675$ Subcontractor Contingency (0%):Subtotal:Subcontractor Overhead & Profit (26.5%):Subtotal:Subtotal:Total M&L CostTotal Labor CostTotal Material CostUnit Labor-HrsMaterial CostDesign Cost (6%):TradeSales Tax (0%):Total Installed Cost:Bond (0%):Supervision, Inspection & Overhead (6.5%):Controls SetupMisc. piping & InstrumentationDescriptionU/MUnit QtyLabor Rates ($/Hr)Pump Motor WiringVariable Secondary PumpingRabbit Creek Audit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 17Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 094. The heating water system operates 2106.4 hours per year.3. Motor Load Factor = (Chilled Water Load (%) / 100%)^325.5 7.9 17.7 18,138 6,520 11,618 - - -$ - - - 293$ 90$ 203$ 1,607$ 578$ 1,030$ -$ -$ -$ -$ 1,232$ 7. Electrical demand costs = $8.89/kW.2. Existing pumping system is rated at 3 hp with flow of 256 gpm, 33 ft. of head, and 86.5% efficiency.6. Electrical consumption costs = $0.0356/kWh.1. 30-year weather bin data for Anchorage AK (nearest available NOAA station) applies.a. Assumptions:3. Proposed pump system will be a 0 hp primary pump with 0 ft of head and a 3 hp secondary pump with 33 ft of head. The secondary pump will operate with a VFD to modulate flow based on heating water demand.7. Energy SavingsElectrical Consumption Cost =Propane Consumption (Gal) =Demand Savings (kW) =Proposed Condition:Demand (kW) =Demand (kW) =Electrical Consumption (kWh) =Baseline Condition:c. Calculations:1. Pump horsepower (hp) = (Pump flow (gpm) x Total Dynamic Head (ft.)) / (3960 x Pump Eff.)b. Equations:2. Baseline Usage (kWh) = Baseline Pump HP x 0.746 x Operating HoursSavings:4. Proposed Usage= (Primary Pump HP x 0.746 x Hours) + (Secondary Pump HP x 0.746 X Hours x Motor Load Factor)7. Monthly Demand Savings = Baseline Demand - Demand at Peak OAT for MonthDemand Cost =Electrical Consumption (kWh) =Total Cost Savings =Electrical Consumption Cost =Natural Gas Cost Savings =Natural Gas Consumption Cost =Water Cost Savings =Electrical Consumption Cost Savings =Propane Savings (Gal) =Water Consumption Cost = Water Consumption Cost =Natural Gas Consumption Cost =Electrical Consumption Savings (kWh) = Propane Consumption (Gal) =Water Savings (kGal) =Water Consumption (kGal) =Demand Cost Savings =Water Consumption (kGal) =Demand Cost =5. kWh Saved = Existing kWh Usage - Proposed kWh Usage6. Annual Cost Savings = kWh Saved x kWh Unit Cost5. The heating water demand is 100% of capacity at the design OAT and 0% at 62°F, and the load profile is linear between these points.Variable Secondary PumpingRabbit Creek Audit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 18Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 10.Rabbit CreekECO Description:Boiler Upgrade (Bldg Rabbit Creek)Applicable Building:Rabbit Creek1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $kGal$ mmBtu $- -$ - -$ 4,118 2,812$ - - 412 2,812$ 2. Installation Cost SummaryO&M CostExisting New Labor Material2,166$ -$ -$ 4,978$ 13,674$ 101,144$ 14,352$ 129,171$ 2,166$ 3. Eliminated Operation and Maintenance Cost120 EA0.5 60.0 --$ -$ -$ -$ -$ 1 LS40.0 40.0 --$ -$ -$ -$ -$ 1 LS1.0 1.0 --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost120 EA0.5 54.0 --$ -$ -$ -$ -$ 1 LS36.0 36.0 --$ -$ -$ -$ -$ 1 LS1.0 1.0 --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ Avoided CostTotal Installed CostUnit Labor-HrsNet Labor-HrsMaterial CostTradeTradeNet Material CostTotal Cost SavingsMaterial Cost for PMAnnual PMM&V CostUnit Qty U/MNet Material CostMaterial CostTotal Labor CostLabor Rates ($/Hr)Labor Rates ($/Hr)Total Labor CostO&M TasksDaily O&MElectric SavingsDaily O&MO&M TasksAnnual PMMaterial Cost for PMInstallation CostsUnit QtyTotal Energy SavingsWater SavingsNatural Gas SavingsNet Labor-HrsUnit Labor-HrsConstruction CostsAnnual CostU/MAnnual CostBoiler UpgradeRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 19Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 10.Rabbit Creek5. Cost Estimate3 EA - Mechanical 84$ -$ 26,652$ 79,956$ 79,956$ 1 LS 128.0 Mechanical 84$ 10,810$ -$ -$ 10,810$ Total Cost10,810$ 79,956$ 90,766$ 6. Avoided Cost Savings1 LS - Mechanical 84$ -$ 2,166$ 2,166$ 2,166$ -$ 2,166$ 2,166$ 7. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - Total Material CostTotal M&L CostAnnualized Avoided Replacement CostMaterial CostThermal Soultions Evo EVAM-2500DescriptionTotal Labor CostDescriptionUnit Qty U/MUnit Labor-HrsTotalTotal M&L CostTest OperationReportTotal CostTradeLabor Rates ($/Hr)DutiesDemolitionTradeRecord OperationInspect EquipmentLabor Requirement (Hours)Total Material CostLabor Rates ($/Hr)Total Labor CostMaterial CostUnit Qty U/MUnit Labor-HrsBoiler UpgradeRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 20Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 10.Rabbit Creek8. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:114,818$ Subtotal:90,766$ Supervision, Inspection & Overhead (6.5%): 7,463$ Subcontractor Overhead & Profit (26.5%): 24,053$ Design Cost (6%):6,889$ Subtotal:114,818$ Total Installed Cost:129,171$ 9. Energy Savingsa. Assumptions:2. Annualized Avoided Replacement Cost is based on a 25 year lifecycle and a 20 year length of study at a discount rate of 3.0%. Units less than 5 years old are excluded.3. Annualized Avoided Replacement Cost is included in O&M savings2 11 199711. Fuel Oil accounts for less than 7% of basewide heating fuel consumption. For uniformity of calculation among buildings, this ECO assumes all fuel use is gas.9. No cooling occurs above 62°F OAT.3. Existing boiler measured efficiency = 79.9%4. Proposed boiler efficiency = 88.0%5. Existing standby losses = 1.0%6. Proposed standby losses = 1.0%7. It was assumed that the annual building heating kbtu/sqft is in line with EIA regional averages. The heating load at design temperature is adjusted to 23.6% of the max output of the boiler system based on these averages and the heating load decreases linearly with increased outdoor air temperature.8. Unoccupied temperature setpoint = 60°F9. Heating setpoint = 68°F10. Natural Gas costs = $0.68279/CCFRemaining LifeUnit ReplacedWeil McLain 13881. 30-year weather bin data for Anchorage AK applies.QuantityYear Installed 1-for-1 Replacement Cost New Unit22,298.17Thermal Soultions Evo EVAM-2500Boiler UpgradeRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 21Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 10.Rabbit Creekc. Calculations:Baseline Condition:Proposed Condition:Demand (kW) =- Demand (kW) =- Demand Savings (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption Savings (kWh) =- Natural Gas Consumption (CCF) =50,155 Natural Gas Consumption (CCF) =46,036 Natural Gas Savings (CCF) =4,118 Water Consumption (kGal) =- Water Consumption (kGal) =- Water Savings (kGal) =- Demand Cost =-$ Demand Cost =-$ Demand Cost Savings =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost Savings =-$ Natural Gas Consumption Cost =34,245$ Natural Gas Consumption Cost =31,433$ Natural Gas Cost Savings =2,812$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =2,812$ b. Equations:1. Building Heat Load = Building Load Factor x Max Boiler Output2. Existing mmBtu Usage = Heat Load x Bin Hrs / Existing Efficiency5. Annual Cost Savings = mmBtu Saved x mmBtu Unit Cost3. Proposed mmBtu Usage = Heat Load x Bin Hrs / Proposed Efficiency4. mmBtu Saved = Existing mmBtu Usage - Proposed mmBtu UsageBoiler UpgradeRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 22Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisECO 11 - WeatherstrippingECO NO:ECO 11.Rabbit CreekECO Description:Weatherstripping (Bldg Rabbit Creek)Applicable Building:Rabbit Creek1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $ kGal$ mmBtu $- -$ - -$ 469 320$ - - 469 320$ 2. Installation Cost SummaryO&M CostExisting New Labor Material-$ -$ -$ 320$ 2,785$ 4,627$ 445$ 7,857$ 3. Eliminated Operation and Maintenance Cost- EA- - Electrician74$ -$ -$ -$ -$ - EA- - Electrician74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost- EA- - Electrician74$ -$ -$ -$ -$ EA- - Electrician74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ Electric SavingsCCFWater Savings Total Energy SavingsM&V CostTotal Cost SavingsInstallation CostsNet Material CostConstruction CostsTotal Installed CostO&M TasksUnit Qty U/MUnit Labor-HrsNet Labor-Hrs TradeO&M TasksUnit Labor-HrsLabor Rates ($/Hr)Total Labor CostMaterial CostNet Material CostAnnual CostAnnual CostDaily O&MTradeLabor Rates ($/Hr)Annual PMMaterial Cost for PMTotal Labor CostDaily O&MAnnual PMUnit Qty U/MMaterial CostMaterial Cost for PMNet Labor-HrsWeatherstrippingRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 23Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisECO 11 - WeatherstrippingECO NO:ECO 11.Rabbit Creek5. Cost Estimate20 EA 1.00 Carpenter 68$ 1,356$ 113$ 2,254$ 3,609$ 7 EA1.50 Carpenter68$ 712$ 169$ 1,181$ 1,892$ - EA2.50 Carpenter68$ -$ --$ -$ - - --$ -$ -$ -$ -$ - - --$ -$ -$ -$ -$ - - --$ -$ -$ -$ -$ Total Cost2,067$ 3,434$ 5,502$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (6.5%):452$ Subcontractor Contingency (26.5%):1,458$ Subtotal:7,412$ Subtotal:6,959$ Supervision, Inspection & Overhead (6%):445$ Subcontractor Overhead & Profit (0%):-$ Design Cost (0%):-$ Subtotal:6,959$ Total Installed Cost:7,857$ Total Labor CostDescriptionUnit QtyTotal Material CostTotal M&L CostU/MUnit Labor-HrsTradeLabor Rates ($/Hr)Unit Material CostDutiesLabor Requirement (Hours)Door Gasket Material Single DoorDoor Gasket Material Double DoorDoor Gasket Material Overhead DoorTotalInspect EquipmentRecord OperationTest OperationReportWeatherstrippingRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 24Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisECO 11 - WeatherstrippingECO NO:ECO 11.Rabbit Creek8. Energy Savings3. Existing total door perimeter is 640. ft.a. Heating setpoint = 68b. Cooling setpoint = 72c. Total boiler efficiency = 85. %d. Total chiller COP = 3e. Door Leakage Factor (in2/ft2)Non-WeatherstrippedWeatherstrippedSingle Door = 0.157Single Door = 0.114Double Door = 0.16Double Door = 0.114Electric Demand Savings (kW) =- Electric Consumption Savings (kWh) =- Natural Gas Savings (CCF) =469 Water Savings (kGal) =- Electric Demand Cost Savings =-$ Electric Consumption Cost Savings =-$ Natural Gas Cost Savings =320$ Water Cost Savings =-$ 320$ a. Assumptions:1. Weatherstripping will be applied to door perimeter to stop air infiltration.2. Window air infiltration is considered in a separate ECO.b. Equations:1. Door Leakage Area (in2) = Door Area x Door Leakage Factorc. Calculations:4. Calculations performed with RETScreen v45. Electric Demand costs $11.48/kW6. Electric Consumption costs $0.088612/kWh7. Natural Gas costs $0.68279/CCFTotal Cost Savings =2. Specific Infiltration (CFM/in2) = [ (Stack Coefficient x ΔT) + (Wind Coefficient x [Wind Speed]2 )]1/23. ΔT = Heating Setpoint Temp - Bin Temp4. Air Infiltration (CFM) = Specific Infiltration x Door Leakage Area5. Heat Loss Rate (Btu/hr) = 1.08 x Air Infiltration x ΔT6. Heating Load (mmBtu) = Heat Loss Rate x Bin Hours / 1,000,0007. Energy Savings = Baseline - ProposedWeatherstrippingRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 25Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:M13.Rabbit CreekECO Description:Domestic Hot Water Heater Upgrade (Bldg Rabbit Creek)Applicable Building:Rabbit Creek1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $ kGal$ mmBtu $- -$ - -$ 2,267 1,548$ - - 227 1,548$ 2. Installation Cost SummaryO&M CostExisting New Labor Material-$ -$ -$ 1,548$ 2,069$ 18,780$ 2,606$ 23,455$ 3. Eliminated Operation and Maintenance Cost- EA- - Plumber74$ -$ -$ -$ -$ - EA1.0 - Plumber74$ -$ -$ -$ -$ - LS- - Plumber74$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost- EA- - Plumber74$ -$ -$ -$ -$ - EA1.0 - Plumber74$ -$ -$ -$ -$ - LS- - Plumber74$ -$ -$ -$ -$ Total Cost-$ Electric SavingsNatural Gas Savings Water Savings Total Energy SavingsM&V CostTotal Cost SavingsInstallation CostsMaterial CostNet Material CostAnnual CostDaily O&MConstruction CostsTotal Installed CostO&M TasksUnit Qty U/MUnit Labor-HrsO&M TasksLabor Rates ($/Hr)Total Labor CostAnnual PMMaterial Cost for PMNet Labor-Hrs TradeNet Material CostAnnual CostDaily O&MAnnual PMUnit Qty U/MUnit Labor-HrsNet Labor-HrsTotal Labor CostMaterial CostMaterial Cost for PMTradeLabor Rates ($/Hr)Domestic Water HeaterBldg Rabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 26Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:M13.Rabbit Creek5. Cost Estimate1 EA 15.0 Plumber74$ 1,108$ 14,666$ 14,666$ 15,774$ 1 EA6.0 Plumber74$ 443$ 180$ 180$ 623$ 1 LS1.1 Plumber74$ 84$ -$ -$ 84$ - - - Other-$ -$ -$ -$ -$ - - - Other-$ -$ -$ -$ -$ 1 LS- Other-$ -$ -$ -$ -$ Total Cost1,636$ 14,846$ 16,481$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:20,849$ Subtotal:16,481$ Supervision, Inspection & Overhead (6.5%): 1,355$ Subcontractor Overhead & Profit (26.5%): 4,368$ Design Cost (6%):1,251$ Subtotal:20,849$ Total Installed Cost:23,455$ TradeLabor Rates ($/Hr)Inspect EquipmentRecord OperationDemolition WorkAvoided CostsDutiesLabor Requirement (Hours)Total Material CostTotal M&L CostSTATE SUF 130 500NEAFlue installation, pipe re-route, misc.U/MUnit Labor-HrsTotal Labor CostMaterial CostDescriptionUnit QtyTest OperationReportTotalDomestic Water HeaterBldg Rabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 27Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:M13.Rabbit Creek8. Energy Savingsa. Assumptions:2. Gas water heater sizing based on sum of sink and shower fixture GPM x 60% hot water use with a peak demand of 80% of total GPM5. Surface area of tanks calculated based on capacity and standard sizings.6. Existing water heaters have an R-value of 7.9. Existing annual usage split between existing heaters proportionally with tank size.10. Avoided Replacement Cost is based on a 20 year lifecycle at a discount rate of 3.0%. Units with more than 5 years remaining life are excluded from the calculation.12. Natural Gas consumption costs $0.68279/CCF120 1991 1.047.2 3378,76020,250,000 223,304,000 16,875,000b. Equations:1. Existing Standby Losses = 1/R x SurfaceArea x (Temp. tank- Temp. ambient)2. Energy Savings per year (kWh/yr.) = Standby Losses x hours /3413Baseline Condition:Proposed Condition:Savings Estiamtes:Demand (kW) =- Demand (kW) =- Demand Savings (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption Savings (kWh) =- Natural Gas Consumption (CCF) =2,436 Natural Gas Consumption (CCF) =169 Natural Gas Savings (CCF) =2,267 Water Consumption (kGal) =- Water Consumption (kGal) =- Water Savings (kGal) =- Demand Cost =-$ Demand Cost =-$ Demand Cost Savings =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost Savings =-$ Natural Gas Consumption Cost =1,663$ Natural Gas Consumption Cost =115$ Natural Gas Cost Savings =1,548$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =1,547.74$ Surface Area (sq. ft.)Existing Standby Losses (Btu/hr)1. Installed Gas Water Heaters based on STATE SUF 130 500NEA @ 70 deg F temperature rise3. Existing water heater temperature is 120 degrees F.4. The ambient temperature is 70 degrees F.Hours of Operation (hr)Existing Annual Usage (Btu.yr)Indirect Loop STATE SUF 130 500NEA7. Existing water heaters operate 8,760 hours per year.8. One bank of multiple instantaneous heater will replace each traditional tank heater.11. Electrical consumption costs $0.088612/kWh.Existing Water Heater Size (nominal gallons)Existing Water Heater TypeReplacement Water Heater TypeExisting Tank Year InstalledReplacement Value Factor (% of 1 for 1 replacement cost avoided)Summer Shutoff SavingsProposed Annual Usage (Btu.yr)3. Cost Savings = Energy Savings x $0.0360Domestic Water HeaterBldg Rabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 28Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 14.Rabbit Creek ElementaryECO Description:High-Efficiency Toilets (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $ kGal$ mmBtu $- -$ - -$ - -$ 471.15 3,637.30 - 3,637$ 2. Installation Cost SummaryO&M CostExisting New Labor Material-$ -$ -$ 3,637$ 8,510$ 12,941$ 2,681$ 24,132$ 3. Eliminated Operation and Maintenance Cost- EA - - Plumber74$ -$ -$ -$ -$ - EA- - Plumber74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost- EA - - Plumber74$ -$ -$ -$ -$ EA1.0 - Plumber74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ Total Energy SavingsWater SavingsNatural Gas SavingsElectric SavingsDaily O&MAnnual PMMaterial Cost for PMAnnual CostLabor Rates ($/Hr)Total Labor CostMaterial CostNet Material CostTradeTradeNet Material CostMaterial CostTotal Labor CostLabor Rates ($/Hr)O&M TasksUnit QtyNet Labor-HrsUnit Labor-HrsU/MDaily O&MUnit Labor-HrsNet Labor-HrsInstallation CostsM&V CostTotal Cost SavingsMaterial Cost for PMAnnual PMO&M TasksConstruction CostsTotal Installed CostAnnual CostUnit Qty U/MHigh Efficiency ToiletsRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 29Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 14.Rabbit Creek Elementary5. Cost Estimate33 EA2.8 Plumber74$ 6,727$ 310$ 10,230$ 16,957$ - - - Electrician74$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost6,727$ 10,230$ 16,957$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:21,451$ Subtotal:16,957$ Supervision, Inspection & Overhead (6.5%): 1,394$ Subcontractor Overhead & Profit (26.5%): 4,494$ Design Cost (6%):1,287$ Subtotal:21,451$ Total Installed Cost:24,132$ DutiesInstall Sloan 1.6 gpf flushometerInspect EquipmentLabor Requirement (Hours)Unit Qty U/MUnit Labor-HrsLabor Rates ($/Hr)Total Labor CostMaterial CostTotal Material CostTotalDescriptionTest OperationReportTradeTotal M&L CostRecord OperationHigh Efficiency ToiletsRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 30Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 14.Rabbit Creek Elementary8. Energy Savingsa. Assumptions:8. Domestic water cost = $4.09/kGal.9. Wastewater cost = $3.63/kGal.10. Electric Consumption costs $0.088612/kWh.11. Electric Demand costs $11.48/kW.12. Natural Gas costs $0.68279/gal.b. Equations:c. Calculations:Baseline Condition:Proposed Condition:Savings:Demand (kW) =- Demand (kW) =- Demand (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Natural Gas Consumption (CCF)- Natural Gas Consumption (CCF)- Natural Gas Consumption (CCF)- Water Consumption (kGal) =868 Water Consumption (kGal) =397 Water Consumption (kGal) =471 Demand Cost =-$ Demand Cost =-$ Demand Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Natural Gas Consumption Cost-$ Natural Gas Consumption Cost-$ Natural Gas Consumption Cost-$ Water Consumption Cost =6,700$ Water Consumption Cost =3,063$ Water Consumption Cost =3,637$ Total Cost Savings =3,637$ 5. Annual Water Savings (kGal) = Existing Annual Usage - Proposed Annual Usage6. Annual Cost Savings ($) = Annual Water Savings x Water & Sewer Unit Cost2. Annual Toilet Use = (Total Occupants) x (Annual Weekdays or special occasion Days)3. Existing Annual Water Usage (kGal) = [(Existing Toilet GPF) x (Avg Daily Toilet Use/Person)Weekday x (Annual Occupant Use)Weekday + (Existing Toilet GPF) x (Avg Daily Toilet Use/Person)special occasion x (Annual Occupant Use)special occasion] / 10004. Proposed Annual Water Usage (kGal) = [(Proposed Toilet GPF) x (Avg Daily Toilet Use/Person)Weekday x (Annual Occupant Use)Weekday + (Proposed Toilet GPF) x(Avg Daily Toilet Use/Person)special occasion x (Annual Occupant Use)special occasion] / 10006. Females use the toilet 5 times a day,1 time(s) for solid waste.7. Proposed flush avg. GPF = 1.62. 182 weekdays and 0 special occasion days annually.3. 227.5 male and 227 female occupants on workdays. 0 male and 0 female occupants on special occasion days.4. Restroom fixture usage rate = 5X per person per day (National average, AWWA).5. Males use the toilet 1 time(s) per day for solid waste.1. Avg Daily Toilet Use/Person = [(# Males) x (Male Daily Use Rate) + (# Females) x (Female Daily Use Rate)] / Total Occupants1. 33 existing commercial toilets @ 3.5 gpf.High Efficiency ToiletsRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 31Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 15.Rabbit Creek ElementaryECO Description:High-Efficiency Urinals (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykW kW $kWhkWh $ CCF $ kGal$ mmBtu $- -$ - -$ - -$ 165.98 1,281.40 - 1,281$ 2. Installation Cost SummaryO&M CostExisting New Labor Material6,655$ 6,655$ -$ 1,281$ 6,474$ 5,591$ 1,508$ 13,574$ 3. Eliminated Operation and Maintenance Cost1,300 EA 0.1 130.0 Janitor 36$ 4,709$ 0.02$ 26$ 4,735$ 26 EA1.0 26.0 Plumber74$ 1,920$ -$ -$ 1,920$ - LS- - Plumber74$ -$ -$ -$ -$ Total Cost6,655$ 4. New Operation and Maintenance Cost1,300 EA 0.1 130.0 Janitor 36$ 4,709$ 0.02$ 26$ 4,735$ 26 EA1.0 26.0 Plumber74$ 1,920$ -$ -$ 1,920$ - LS- - Plumber74$ -$ 58$ -$ -$ Total Cost6,655$ Electric SavingsNatural Gas SavingsWater SavingsTotal Energy SavingsM&V CostTotal Cost SavingsInstallation CostsConstruction CostsTotal Installed CostO&M TasksUnit Qty U/MUnit Labor-HrsNet Labor-Hrs TradeAnnual CostDaily O&MAnnual PMMaterial Cost for PMLabor Rates ($/Hr)Total Labor CostMaterial CostNet Material CostAnnual CostDaily O&MNet Labor-Hrs TradeLabor Rates ($/Hr)Total Labor CostO&M TasksUnit Qty U/MUnit Labor-HrsAnnual PMMaterial Cost for PMMaterial CostNet Material CostWaterless UrinalsBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 32Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 15.Rabbit Creek Elementary5. Cost Estimate13 EA5.3 Plumber74$ 5,118$ 340$ 4,420$ 9,538$ 13 EA1.1 Plumber74$ 1,098$ -$ -$ 1,098$ Total Cost5,118$ 4,420$ 9,538$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- DailyWeekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:12,065$ Subtotal:9,538$ Supervision, Inspection & Overhead (6.5%):784$ Subcontractor Overhead & Profit (26.5%):2,528$ Design Cost (6%):724$ Subtotal:12,065$ Total Installed Cost:13,574$ DescriptionUnit QtyTotal Material CostTotal M&L CostU/MUnit Labor-HrsTradeLabor Rates ($/Hr)Install High Efficiency UrinalDemo Existing UrinalDutiesLabor Requirement (Hours)Total Labor CostMaterial CostTotalInspect EquipmentRecord OperationTest OperationReportWaterless UrinalsBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 33Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 15.Rabbit Creek Elementary8. Energy Savingsa. Assumptions:7. Domestic water cost = $4.09/kGal.8. Wastewater cost = $3.63/kGal.9. Electric Consumption costs $0.088612/kWh.10. Electric Demand costs $11.48/kW.11. Natural Gas costs $0.68279/gal.b. Equations:c. Calculations:Baseline Condition:Proposed Condition:Savings:Demand (kW) =- Demand (kW) =- Demand Savings (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption Savings (kWh) =- Natural Gas Consumption (CCF) =- Natural Gas Consumption (CCF) =- Natural Gas Savings () =- Water Consumption (kGal) =249 Water Consumption (kGal) =83 Water Savings (kGal) =166 Demand Cost =-$ Demand Cost =-$ Demand Cost Savings =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost Savings =-$ Natural Gas Consumption Cost =-$ Natural Gas Consumption Cost =-$ Natural Gas Cost Savings =-$ Water Consumption Cost =1,922$ Water Consumption Cost =641$ Water Cost Savings =1,281$ Total Cost Savings =1,281$ 1. 13 existing urinal(s) @ 1.5 gpf.2. 182 weekdays and 0 special occasion days annually.3. 228 male occupants on workdays. 0 male occupants on special occasion days.2. Existing or Proposed Annual Urinal Usage (kGal) = ( [(Avg Daily Use/Person)Weekday x (Urinal GPF) x (Annual Urinal Use)Weekday] + [(Avg Daily Use/Person)special occasionday x (Urinal GPF) x (Annual Urinal Use)special occasionday] ) / 10003. Annual Water or Fuel Savings = Existing Annual Usage - Proposed Annual Usage4. Annual Cost Savings ($) = Annual Water Savings x Utility Unit Cost4. Restroom fixture usage rate = 5X per person per day (National average, AWWA).5. Males use the urinal 4 time(s) per day for liquid waste.6. Proposed flush avg. GPF = 0.51. Annual Urinal Use = [(Total Male Occupants) x (Total Days)]Weekday or special occasion DaysWaterless UrinalsBldg Rabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 34Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 16.Rabbit Creek ElementaryECO Description:Low Flow Faucets (Bldg Rabbit Creek Elementary)Applicable Building:Rabbit Creek Elementary1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $kGal$ mmBtu $- -$ - -$ 44 30$ 9.94 76.72 4 107$ 2. Installation Cost SummaryO&M CostExisting NewLabor Material-$ -$ -$ 107$ 514$ 668$ 148$ 1,330$ 3. Eliminated Operation and Maintenance Cost- EA - - Electrician 74$ -$ -$ -$ -$ - EA- - Electrician74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost- EA - - Electrician 74$ -$ -$ -$ -$ - EA1.0 - Electrician74$ -$ -$ -$ -$ - LS- - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost-$ Total Energy SavingsWater SavingsNatural Gas SavingsElectric SavingsDaily O&MAnnual PMMaterial Cost for PMAnnual CostLabor Rates ($/Hr)Total Labor CostMaterial CostNet Material CostTradeTradeNet Material CostMaterial CostTotal Labor CostLabor Rates ($/Hr)O&M TasksUnit QtyNet Labor-HrsUnit Labor-HrsU/MDaily O&MUnit Labor-HrsNet Labor-HrsInstallation CostsM&V CostTotal Cost SavingsMaterial Cost for PMAnnual PMO&M TasksConstruction CostsTotal Installed CostAnnual CostUnit Qty U/MLow Flow FaucetsRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 35Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 16.Rabbit Creek Elementary5. Cost Estimate- EA 0.2 Plumber 74$ -$ 15$ -$ -$ 33 EA0.2 Plumber74$ 406$ 16$ 528$ 934$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ - - - --$ -$ -$ -$ -$ Total Cost406$ 528$ 934$ 6. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - 7. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:1,182$ Subtotal:934$ Supervision, Inspection & Overhead (6.5%):77$ Subcontractor Overhead & Profit (26.5%):248$ Design Cost (6%):71$ Subtotal:1,182$ Total Installed Cost:1,330$ DutiesInspect EquipmentLabor Requirement (Hours)Ultra Low Flow Faucet AeratorKitchen Faucet Swivel AeratorUnit Qty U/MUnit Labor-HrsLabor Rates ($/Hr)Total Labor CostMaterial CostTotal Material CostTotalDescriptionTest OperationReportTradeTotal M&L CostRecord OperationLow Flow FaucetsRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 36Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 16.Rabbit Creek Elementary8. Energy Savingsa. Assumptions:1. 0 existing lavatory faucets @ 0 gpm; 33 kitchen faucet @ 2.2 gpm.2. 182 weekdays and 24 special occasion days annually.3. 455 occupant on workdays and 0 on special occasion days.4. Avg daily use/person: lav faucet = 3 mins, kitchen faucet = 1 min5. Estimate of 20% of occupants use the kitchen faucet once daily.6. Proposed lav faucet @ 0.5 gpm; kitchen faucet @ 1 gpm.7. 60% of domestic water is heated hotwater; 80 temp rise; 90% water heater efficiency.8. Domestic water cost = $4.09/kGal.9. Wastewater cost = $3.63/kGal.10. Electric Consumption costs $0.088612/kWh.11. Electric Demand costs $11.48/kW.12. Natural Gas costs $0.68279/gal.b. Equations:1. Annual Lav Faucet Use = [(Total Occupants) x (Total Days)]Weekday or special occasion Days2. Annual Kitchen Faucet Use = [(Total Occupants) x (Total Days) x (Kitchen Use Use Factor)]Weekday or special occasion Days3. Existing or Proposed Annual Lav Faucet Usage (kGal) = ( [(Avg Daily Use/Person)Weekday x (Annual Lav Faucet Use)Weekday x (Faucet GPM)] + [(Avg Daily Use/Person)special occasionday x (Annual Lav Faucet Use)special occasionday x (Faucet GPM)] ) / 10004. Existing or Proposed Annual Kitchen Faucet Usage (kGal) = ( [(Avg Daily Use/Person)Weekday x (Annual Kitchen Faucet Use)Weekday x (Faucet GPM)] + [(Avg Daily Use/Person)special occasionday x (Annual Kitchen Faucet Use)special occasionday x (Faucet GPM)] ) / 10005. Annual Water Usage (kGal) = [(Annual Lav Use) + (Annual Kit Use)]Existing/Proposed6. Annual DHW Capacity (kGal) = (% DHW) x (Annual Water Usage)Existing/Proposed7. Heating Energy (mmBtu) = DHW Gal x (8.33 lb/gal) x (1 Btu/lb-°F) x ΔT / 1,000,0008. Fuel Required (mmBtu) = Heating Energy / Boiler Efficiency9. Annual Water or Fuel Savings = Existing Annual Usage - Proposed Annual Usage10. Annual Cost Savings ($) = Annual Savings x Utility Unit Costc. Calculations:Baseline Condition:Proposed Condition:Demand (kW) =- Demand (kW) =- Demand (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Natural Gas Consumption (CCF)162 Natural Gas Consumption (CCF)118 Natural Gas Consumption (CCF)44 Water Consumption (kGal) =36 Water Consumption (kGal) =26 Water Consumption (kGal) =10 Demand Cost =-$ Demand Cost =-$ Demand Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Natural Gas Consumption Cost111$ Natural Gas Consumption Cost80$ Natural Gas Consumption Cost30$ Water Consumption Cost =281$ Water Consumption Cost =205$ Water Consumption Cost =77$ Total Cost Savings =107$ Low Flow FaucetsRabbit Creek ElementaryAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 37Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 18.Rabbit CreekECO Description:Boiler Upgrade (Bldg Rabbit Creek)Applicable Building:Rabbit Creek1. Energy & Cost Savings SummarykW kW $ kWh kWh $ CCF $ kGal$ mmBtu $- -$ - -$ 6,620 4,520$ - - 662 4,520$ 2. Installation Cost SummaryO&M CostExisting New Labor Material2,166$ -$ -$ 6,686$ 17,309$ 140,889$ 19,775$ 177,972$ 2,166$ 3. Eliminated Operation and Maintenance Cost120 EA0.5 60.0 --$ -$ -$ -$ -$ 1 LS40.0 40.0 --$ -$ -$ -$ -$ 1 LS1.0 1.0 --$ -$ -$ -$ -$ Total Cost-$ 4. New Operation and Maintenance Cost120 EA0.5 54.0 --$ -$ -$ -$ -$ 1 LS36.0 36.0 --$ -$ -$ -$ -$ 1 LS1.0 1.0 --$ -$ -$ -$ -$ Total Cost-$ U/MAnnual CostTotal Energy SavingsWater SavingsNatural Gas SavingsNet Labor-HrsUnit Labor-HrsConstruction CostsAnnual CostDaily O&MElectric SavingsDaily O&MO&M TasksAnnual PMMaterial Cost for PMInstallation CostsUnit Qty U/MNet Material CostMaterial CostTotal Labor CostLabor Rates ($/Hr)Labor Rates ($/Hr)Total Labor CostTotal Cost SavingsMaterial Cost for PMAnnual PMM&V CostO&M TasksUnit QtyUnit Labor-HrsNet Labor-HrsMaterial CostTradeTradeNet Material CostTotal Installed CostAvoided CostCO BoilerRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 38Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 18.Rabbit Creek5. Cost Estimate2 EA - Mechanical 84$ -$ 45,448$ 90,895$ 90,895$ 1 EA - Mechanical 84$ -$ 16,887$ 16,887$ 16,887$ 1 LS - Mechanical 84$ 1,796$ 3,592$ 3,592$ 5,388$ 1 LS - Mechanical 84$ 1,077$ -$ -$ 1,077$ 1 LS 128.0 Mechanical 84$ 10,810$ -$ -$ 10,810$ Total Cost13,683$ 111,374$ 125,057$ 6. Avoided Cost Savings1 LS - Mechanical 84$ -$ 2,166$ 2,166$ 2,166$ -$ 2,166$ 2,166$ 7. Measurement and Verification CostAnnual Labor Requirement (Hrs):- Daily Weekly Monthly Quarterly Semi-Annual Annual Total Labor Rate ($Hr):50$ - - - - - - - Annual Labor Cost ($):-$ - - - - - - - Annual Material/Equipment Cost ($):-$ - - - - - - - Total Annual M&V Cost ($):-$ - - - - - - - - - - - - - - ControllerRecord OperationUnit Qty U/MUnit Labor-HrsLabor Rates ($/Hr)Total Labor CostMaterial CostTotal Material CostInspect EquipmentLabor Requirement (Hours)DutiesDemolitionTotal Labor CostTradeTotalTotal M&L CostTest OperationReportAERCO BMK750Total CostTradeLabor Rates ($/Hr)DescriptionUnit Qty U/MUnit Labor-HrsStartupTotal Material CostTotal M&L CostAnnualized Avoided Replacement CostMaterial CostAERCO BMK3.0 LN & AERCO BMK75DescriptionCO BoilerRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 39Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 18.Rabbit Creek8. Project MarkupsSales Tax (0%):-$ Bond (0%):-$ Subcontractor Contingency (0%):-$ Subtotal:158,197$ Subtotal:125,057$ Supervision, Inspection & Overhead (6.5%): 10,283$ Subcontractor Overhead & Profit (26.5%): 33,140$ Design Cost (6%):9,492$ Subtotal:158,197$ Total Installed Cost:177,972$ 9. Energy Savingsa. Assumptions:2. Annualized Avoided Replacement Cost is based on a 25 year lifecycle and a 20 year length of study at a discount rate of 3.0%. Units less than 5 years old are excluded.3. Annualized Avoided Replacement Cost is included in O&M savings2 11 199711. Fuel Oil accounts for less than 7% of basewide heating fuel consumption. For uniformity of calculation among buildings, this ECO assumes all fuel use is gas.22,298.17 AERCO BMK3.0 LN & AERCO BMK750QuantityYear Installed 1-for-1 Replacement Cost New Unit1. 30-year weather bin data for Anchorage AK applies.AERCO BMK750Remaining LifeUnit ReplacedWeil McLain 13889. No cooling occurs above 62°F OAT.3. Existing boiler measured efficiency = 79.9%4. Proposed boiler efficiency = 93.0%5. Existing standby losses = 1.0%6. Proposed standby losses = 1.0%7. It was assumed that the annual building heating kbtu/sqft is in line with EIA regional averages. The heating load at design temperature is adjusted to 23.6% of the max output of the boiler system based on these averages and the heating load decreases linearly with increased outdoor air temperature.8. Unoccupied temperature setpoint = 60°F9. Heating setpoint = 68°F10. Natural Gas costs = $0.68279/CCFCO BoilerRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 40Level II Energy Audit Rabbit Creek ES Anchorage, AK
Energy Conservation Opportunity AnalysisASD, Anchorage, Alaska 99516ECO NO:ECO 18.Rabbit Creekc. Calculations:Baseline Condition:Proposed Condition:Demand (kW) =- Demand (kW) =- Demand Savings (kW) =- Electrical Consumption (kWh) =- Electrical Consumption (kWh) =- Electrical Consumption Savings (kWh) =- Natural Gas Consumption (CCF) =50,155 Natural Gas Consumption (CCF) =43,534 Natural Gas Savings (CCF) =6,620 Water Consumption (kGal) =- Water Consumption (kGal) =- Water Savings (kGal) =- Demand Cost =-$ Demand Cost =-$ Demand Cost Savings =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost =-$ Electrical Consumption Cost Savings =-$ Natural Gas Consumption Cost =34,245$ Natural Gas Consumption Cost =29,725$ Natural Gas Cost Savings =4,520$ Water Consumption Cost =-$ Water Consumption Cost =-$ Water Cost Savings =-$ Total Cost Savings =4,520$ 3. Proposed mmBtu Usage = Heat Load x Bin Hrs / Proposed Efficiency4. mmBtu Saved = Existing mmBtu Usage - Proposed mmBtu Usageb. Equations:1. Building Heat Load = Building Load Factor x Max Boiler Output2. Existing mmBtu Usage = Heat Load x Bin Hrs / Existing Efficiency5. Annual Cost Savings = mmBtu Saved x mmBtu Unit CostCO BoilerRabbit CreekAudit Report Ameresco Federal Solutions Appendix B - ECO Calculations, Page 41Level II Energy Audit Rabbit Creek ES Anchorage, AK
APPENDIX C
Major Equipment
Survey
Name Location Area ServedMakeModelTypeCapacityInstall YearNotesAHU-1 Mech Rm 200 CafeteriaGreenheck BCF-208-5WAHU-1 Mech Rm 211 Multi Purpose Room Greenheck BCF-208-5WB-1 Boiler Rm Whole Bldg Weil Mclain Series 88 1388Cast Iron Segmental 2843 MBH Output 199785.6% EfficientB-2 Boiler Rm Whole Bldg Weil Mclain Series 88 1388Cast Iron Segmental 2843 MBH Output 199785.6% EfficientET-1 Boiler Rm Whole Bldg Antrol L SeriesExpansion Tank211 gal 1997ET-2 Boiler Rm Whole Bldg Antrol L SeriesExpansion Tank211 gal 1997RH-1 RoofWhole Bldg Penn Ventilator30"x30" OpeningP-1 Boiler Rm Whole Bldg Bell and Gossettin-line2 HPP-2 Boiler Rm Whole Bldg Bell and Gossettin-line2 HPP-3A Boiler Rm Whole Bldg Bell and GossettBase Mounted3 HPSecondary Loop PumpsP-3B Boiler Rm Whole Bldg Bell and GossettBase Mounted3 HPSecondary Loop PumpsP-4 Boiler Rm Whole BldgPaco and PIPSubmersible1/3 HPP-5 Boiler Rm Whole Bldg Bell and Gossettin-line1/6 HPP-6 Boiler Rm Whole Bldg Bell and Gossettin-line1/6 HPP-7 Boiler Rm Whole Bldg Bell and Gossettin-line3/4 HPP-8 Boiler Rm Whole Bldg Bell and Gossettin-line3/4 HPP-9 Boiler Rm Whole Bldg Bell and Gossettin-line1/6 HPWH-1 Boiler Rm Whole BldgPUI20N125A-PGGas140 GalMechanical Equipment Summary
APPENDIX D
Thermal Image
Report
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:18:39 PMImage Date
IR_0415.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
14.2 change in termperature- picture depicts mostly
conductive heat loss
Description
Exterior Door
1 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:20:51 PMImage Date
IR_0419.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Heat loss on left side of operable window
Description
Operable window at lower-right corner
2 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:22:10 PMImage Date
IR_0421.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Convective heat loss
Description
3 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:23:46 PMImage Date
IR_0425.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Poor weather-stripping shown in red, around perimeter
of doors
Description
Exterior door systems
4 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:25:05 PMImage Date
IR_0429.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Good door system- minimal convective heat loss
Description
5 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:29:02 PMImage Date
IR_0437.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Good door system- some covective heat loss shown in white
Description
6 (7)
Inspection Report
Report Date 11/21/2011
Company Ameresco Customer Anchorage School
District- Rabbit Creek ES
Address 6643 Brayton Drive Site Address 13650 Lake Otis Pkwy
Thermographer Ameresco Contact Person
Image and Object Parameters Text Comments
FLIR T300Camera Model
11/10/2011 5:29:33 PMImage Date
IR_0439.jpgImage Name
0.95Emissivity
68.0 °FReflected apparent
temperature
3.3 ftObject Distance
Open window
Description
7 (7)
APPENDIX E
ASHRAE Level II
Description
5
Levels of Effort
Depending on the physical and energy-use characteristics of a building and the
needs and resources of the owner, these steps can require different levels of effort. A
commercial building energy analysis can generally be classified into the following levels
of effort.
OVERVIEW
Preliminary Energy
Use Analysis
Analyze historic utility use and cost. Develop the Energy Utilization Index (EUI) of
the building. Compare the building EUI to similar buildings to determine if further engi-
neering study and analysis are likely to produce significant energy savings.
Level I—Walk-
Through Analysis
Assess a building’s energy cost and efficiency by analyzing energy bills and con-
ducting a brief on-site survey of the building. A Level I energy analysis will identify and
provide a savings and cost analysis of low-cost/no-cost measures. It will also provide a
listing of potential capital improvements that merit further consideration, and an initial
judgment of potential costs and savings. A walk-through analysis of a facility will utilize
all the forms in this publication except those in the section on “Building and Systems
Report.”
Level II—Energy
Survey and Analysis
This includes a more detailed building survey and energy analysis. A breakdown of
the energy use within the building is provided. A Level II energy analysis will identify
and provide the savings and cost analysis of all practical measures that meet the owner’s
constraints and economic criteria, along with a discussion of any changes to operation
and maintenance procedures. It may also provide a listing of potential capital-intensive
improvements that require more thorough data collection and engineering analysis, and
a judgment of potential costs and savings. This level of analysis will be adequate for
most buildings and measures.
Level III—Detailed
Analysis of
Capital-Intensive
Modifications
This level of engineering analysis focuses on potential capital-intensive projects
identified during the Level II analysis and involves more detailed field data gathering as
well as a more rigorous engineering analysis. It provides detailed project cost and sav-
ings calculations with a high level of confidence sufficient for major capital investment
decisions.
6 · Procedures for Commercial Building Energy Audits
Discussion There are not sharp boundaries between these levels. They are general categories for
identifying the type of information that can be expected and an indication of the level of
confidence in the results. It is possible that while performing an energy analysis in a par-
ticular building, various measures may be subjected to different levels of analysis.
Some readers of an energy analysis report may be unable to comprehend the techni-
cal analysis involved, while others may demand a full presentation of the analysis for
critique. Consequently, technical material should be presented in an appendix to the
report, while the body of the report guides the reader through the technical material and
summarizes the findings.
Information presented here outlines the engineering procedures that should be fol-
lowed while performing an energy analysis. It is assumed that the analyst is a knowl-
edgeable and competent individual. No attempt is made in this publication to prescribe
specific methods of data gathering or data analysis.
To assist with the organization of the data collected and the calculation procedures,
this publication contains guideline forms that suggest the type of data to be gathered and
its organization. It is recommended that the analyst develop and use appropriate data col-
lection and organization forms specific to the size and type of building(s) being ana-
lyzed.
The forms presented in the first two sections are building characteristic forms on
which basic building information and energy use can be recorded. Use of these forms by
all engineering analysts will result in a uniform procedure for reporting the results of an
analysis. It is recommended that these forms be completed without modification.
PRELIMINARY
ENERGY USE
ANALYSIS
Before any level of energy analysis is begun, it is valuable to perform a preliminary
energy use analysis to determine a building’s current energy and cost efficiency relative
to other, similar buildings. This is normally done by calculating the energy use and cost
per square foot per year, which can indicate the potential value of further levels of analy-
sis. This preliminary analysis generally includes the following steps.
1. Determine the building’s gross conditioned square footage and record this on
the building characteristics form. Classify the primary use of the building.
Ensure that the standard definition of gross area is used.
2. Assemble copies of all utility bills and summarize them for at least a one-year
period, preferably three years. Review the monthly bills for opportunities to
obtain a better price through taking advantage of different utility rate classes.
Review the monthly patterns for irregularities. Note if a bill is missing or if it is
estimated rather than actual consumption.
3. Complete the energy performance summary to develop the energy index and
the cost index for each fuel, or demand type, and their combined total using
ASHRAE Standard 105 methods.
4. Compare the Energy Utilization Index (EUI) and the cost index with buildings
having similar characteristics. The owner of the subject building may have sim-
ilar buildings for this comparison. Comparison should also be made with pub-
licly available energy indices of similar buildings. In all cases, care should be
taken to ensure that comparison is made with current data, using consistent def-
initions of building usage and floor area.
5. Derive target energy, demand, and cost indices for a building with the same
characteristics as this building. A range of methods are available for this work:
• Pick from any database of similar buildings those buildings with the
lowest energy index.
• Pick an index based on the knowledge of an energy analyst experi-
enced with this type of building.
6. Compare the energy and cost savings for each fuel type if the building were to
reach the target Energy Utilization Index. Using these value(s), determine if
further engineering analysis is recommended.
Levels of Effort · 7
LEVEL I—
WALK-THROUGH
ANALYSIS
This process includes all of the work done for the preliminary energy use analysis,
plus the following.
1. Perform a brief walk-through survey of the facility to become familiar with its
construction, equipment, operation, and maintenance.
2. Meet with owner/operator and occupants to learn of special problems or needs
of the facility. Determine if any maintenance problems and/or practices may
affect efficiency.
3. Perform a space function analysis, guided by the forms in the “Walk-Through
Data” section. Determine if efficiency may be affected by functions that differ
from the original functional intent of the building.
4. Perform a rough estimate to determine the approximate breakdown of energy
use for significant end-use categories, including weather and non-weather-
related uses.
5. Identify low-cost/no-cost changes to the facility or to operating and mainte-
nance procedures, and determine the savings that will result from these
changes.
6. Identify potential capital improvements for further study, and provide an initial
estimate of potential costs and savings.
The report for a Level I analysis should contain the building characteristics and
energy use summary as well as the following.
1. Quantification of savings potential from changing to a different utility price
structure.
2. Discussion of irregularities found in the monthly energy use patterns, with sug-
gestions about their possible causes.
3. The energy index of similar buildings. Report the source, size, and date of the
sample used in this comparison. The names of comparable buildings should be
given if known.
4. The method used to develop the target indices. Where comparison is made to
other buildings, state their names. Where the experience of someone other than
the author is used to develop the target, provide the source. Where the target is
developed by calculation, show the calculation or quote the name and version
of software used and include both input and output data.
5. Total energy and demand cost by fuel type for the latest year and preceding two
years if available. Show potential savings in dollars using the energy index for-
mat of ASHRAE Standard 105.
6. The fraction of current costs that would be saved if the energy index were
brought to the target level.
7. A summary of any special problems or needs identified during the walk-
through survey, including possible revisions to operating and maintenance pro-
cedures.
8. A preliminary energy use breakdown by major end uses.
9. The listing of low-cost/no-cost changes with the savings for these improve-
ments.
10. The potential capital improvements, with an initial estimate of potential costs
and savings
LEVEL II—ENERGY
SURVEY AND
ENGINEERING
ANALYSIS
This analytical procedure is guided by Level I analysis and includes the following
additional work:
1. Review mechanical and electrical system design, installed condition, mainte-
nance practices, and operating methods. Where drawings have been kept up to
date, this task will be much easier.
8 · Procedures for Commercial Building Energy Audits
2. Review existing operating and maintenance problems. Determine planned build-
ing changes.
3. Measure key operating parameters and compare to design levels, for example,
operating schedules, heating/cooling water temperature, supply air temperature,
space temperature and humidity, ventilation quantities, and light level at the
task. Such measurements may be taken on a spot basis, or logged, manually or
electronically.
4. Prepare a breakdown of the total annual energy use into end-use components,
as illustrated in the 1999 ASHRAE Handbook—Applications, Chapter 34, Fig-
ure 4, or as shown in the section “Energy Analysis Summary and Recommen-
dations.” A number of calculation methods are available, ranging from
simplified manual calculations to fully detailed computer simulation of hour-
by-hour building operations for a full year.
5. List all possible modifications to equipment and operations that would save
energy. Select those that might be considered practical by the owner. List pre-
liminary cost and savings estimates.
6. Review the list of practical modifications with the owner/operator and select
those that will be analyzed further. Prioritize the modifications in the antici-
pated order of implementation.
7. For each practical measure, estimate the potential savings in energy cost and its
energy index. To account for interaction between modifications, assume that
modifications with the highest operational priority and/or best return on invest-
ment will be implemented first. A number of calculation methods are available,
ranging from simplified manual calculations to rerunning computer simula-
tions, if performed in Step 4, above.
8. Estimate the cost of each practical measure.
9. Estimate the impact of each practical measure on building operations, mainte-
nance costs, and non-energy operating costs.
10. Estimate the combined energy savings from implementing all of the practical
measures and compare to the potential derived in the Level I analysis. It should
be clearly stated that savings from each modification are based on the assump-
tion that all previous modifications have already been implemented and that the
total savings account for all of the interactions between modifications.
11. Prepare a financial evaluation of the estimated total potential investment using
the owner’s chosen techniques and criteria. These evaluations may be per-
formed for each practical measure.
12. Following submission of the report of the Level II analysis, meet with the
owner to discuss priorities and to help select measures for implementation or
further analysis.
The report for a Level II analysis should contain at least the following.
1. A summary of energy use and cost associated with each end-use. Show calcula-
tions performed or quote the name and version of software used and include
both input and output pages. Provide interpretation of differences between
actual total energy use and calculated or simulated end-use totals.
2. A description of the building, including typical floor plans and inventories of
major energy-using equipment. (This information may be included as an
appendix.)
3. A list of measures considered but felt to be impractical, with brief reasons for
rejecting each.
4. For each practical measure, provide
• a discussion of the existing situation and why it is using excess energy;
• an outline of the measure, including its impact on occupant health,
comfort, and safety;
Levels of Effort · 9
• a description of any repairs that are required for a measure to be effec-
tive;
• the impact on occupant service capabilities, such as ventilation for late
occupancy or year-round cooling;
• an outline of the impact on operating procedures, maintenance proce-
dures, and costs;
• expected life of new equipment, and the impact on the life of existing
equipment;
• an outline of any new skills required in operating staff and training or
hiring recommendations;
• calculations performed or provide the name and version of software
used and include both input and output data.
5. A table listing the estimated costs for all practical measures, the savings, and
financial performance indicator. For the cost of each measure, show the esti-
mated accuracy of the value quoted. This table should spell out the assumed
sequence of implementation and state that savings may be quite different if a
different implementation sequence is followed.
6. A discussion of any differences between the savings projected in this analysis
and the estimated potential derived in the Level I analysis.
7. Overall project economic evaluation.
8. Recommended measurement and verification method(s) that will be required to
determine the actual effectiveness of the recommended measures.
9. Discussion of feasible capital-intensive measures that may require a Level III
analysis.
LEVEL III—DETAILED
ANALYSIS OF
CAPITAL-INTENSIVE
MODIFICATIONS
This analytical procedure is guided by Levels I and II analyses and the owner’s
selection of measures for greater definition. It must follow such Level I and II work.
1. Expand definition of all modifications requiring further analysis.
2. Review measurement methods, and perform additional testing and monitoring
as required to allow determination of feasibility.
3. Perform accurate modeling of proposed modifications. Ensure that modeling
includes system interaction.
4. Prepare a schematic layout of each of the modifications.
5. Estimate the cost and savings of each modification.
6. Meet with owner to discuss/develop recommendations.
The report for a Level III analysis should include the following, as a minimum.
1. Include text, schematics, and equipment lists necessary to completely describe
all proposed changes to physical equipment. Matters of a final design nature
may be left to subsequent engineering as long as the cost of such engineering is
included in the budget. Firm price contractor quotations for key parts of any
measure may be included. Cost estimates shall show contingencies separately
and report the expected accuracy of the budget.
2. Prepare a financial evaluation of the estimated capital investment and projected
savings. Use the owner’s chosen techniques and criteria.