HomeMy WebLinkAboutCIRI-JVM-CAEC Sutton Glacier View K-12 2012-EEENERGY AUDIT FINAL REPORT
Glacier View K-12 School
65975 S. Wolverine Circle
Sutton, AK 99674
p (907) 861-5650
AkWarm ID No. CIRI-JVM-CAEC-01
800 F Street
Anchorage, AK 99501
p (907) 276-6664 f (907) 276-5042
Contact: Walter Heins, PE, CCP, CxA, CEA
32215 Lakefront Dr.
Soldotna, Alaska 99669
p (907) 260-5311
Contact: Jerry P. Herring, PE, CEA
Glacier View K-12 School Final Energy Audit Report
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Contents
I. Executive Summary .................................................................................................................. 1
II. Introduction .............................................................................................................................. 4
III. Energy Audit Process ............................................................................................................. 5
IV. Method of Analysis ................................................................................................................. 6
V. Building Description ................................................................................................................ 7
V.I ARCHITECTURAL DESCRIPTION ............................................................................................................................ 7
V.II MECHANICAL DESCRIPTION ............................................................................................................................... 8
V.III ELECTRICAL DESCRIPTION ................................................................................................................................ 9
V.IV GENERATOR STORAGE SHED DESCRIPTION ..................................................................................................... 10
VI. Historic Energy Consumption and Cost............................................................................. 11
VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 11
VI.II FUEL OIL CONSUMPTION DATA ...................................................................................................................... 11
VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 11
VII. Equipment Inventory and Photo Survey .......................................................................... 13
VIII. Energy Conservation Measures ....................................................................................... 14
VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 14
VIII.II GENERATOR STORAGE SHED ECMS ............................................................................................................. 18
VIII.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ....................................... 19
Appendices
Appendix A – Energy Benchmark Data
Appendix B – AkWarm Commercial Reports
Appendix C – Major Equipment List
Appendix D – Energy Conservation Measures – Glacier View K-12 School
Appendix E – Energy Conservation Measures – Generator Storage Shed
Appendix F – Site Survey Photos
Appendix G – Thermographic Photos
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Abbreviations
AHFC Alaska Housing & Finance Corporation
ARRA American Recovery & Reinvestment Act
ASHRAE American Society of Heating, Refrigeration, and Air-Conditioning Engineers
BTU British Thermal Unit
CCF One Hundred Cubic Feet
CFM Cubic Feet per Minute
DDC Direct Digital Control
ECI Energy Cost Index
ECM Energy Conservation Measure
EPDM Ethylene Propylene Diene Monomer
EUI Energy Utilization Index
F Fahrenheit
GVS Glacier View K-12 School
HP horsepower
HPS High Pressure Sodium
HVAC Heating, Ventilating, and Air-Conditioning
in inch(es)
IPLC Integrated Power & Load Circuit
kWh kilowatt-hour
LED Light-Emitting Diode
MSBSD Matanuska Susitna Borough School District
O&M Operations & Maintenance
sf square feet
SIR Savings-to-Investment Ratio
V Volts
W Watts
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List of Figures
Fig. 1 – Energy Audit Clients ....................................................................................................................... 1
Fig. 2 – Energy Benchmark Data .................................................................................................................. 1
Fig. 3 – Glacier View K-12 School, Alaska – Google Maps ........................................................................ 4
Fig. 4 – Glacier View School – Google Maps .............................................................................................. 4
Fig. 5 – Glacier View School Floor Plan ...................................................................................................... 7
List of Tables
Table 1 – Recommended Energy Conservation Measures, Glacier View School ........................................ 2
Table 2 – Recommended Energy Conservation Measures, Generator Storage Shed ................................... 3
Table 3 – Energy Cost and Consumption Data ........................................................................................... 11
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REPORT DISCLAIMER
Privacy
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.
Limitations of Study
This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the
savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a
Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning
Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA
may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted
with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of
input data provided. Not all data could be verified and no destructive testing or investigations were undertaken.
Some data may have been incomplete.
This report is not intended to be a final design document. Any modifications or changes made to a building to realize
the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting
upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska
Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including
but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design.
Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work
performed as a result of this report.
Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration,
equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided
by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the
performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the
forecasted financial ratios.
The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings.
Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting
quality. The new generation lighting systems have significantly longer life leading to long term labor savings,
especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any
fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7
years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the
performance of students and workers in the built environment. New lighting systems can be designed to address all
of the above benefits.
US Government Disclaimer
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.
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I. Executive Summary
This report presents the findings of an energy audit conducted at Glacier View K-12 School as part of a
contract for:
Alaska Housing Finance Corporation
Contact: Rebekah Luhrs
4300 Boniface Parkway
Anchorage, AK 99510
Email: rluhrs@ahfc.us
Matanuska-Susitna Borough School District
Contact: Rick Jensen
501 N Gulkana Street
Palmer, AK 99645
Email: ricky.jensen@matsuk12.us
Fig. 1 – Energy Audit Clients
This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the
use of innovation and technology to solve energy and environmental problems in a way that improves the
State of Alaska’s economy. This can be achieved through the wiser and more efficient use of energy.
The average January 2009-December 2010 documented annual utility costs at this facility are as follows:
Electricity $21,370
#2 Fuel Oil $28,535
Total $49,905
January 2009-December 2010 Energy Utilization Index (EUI) = 98.4 kBtu/sf
January 2009-December 2010 Energy Cost Index = 2.45 $/sf
Fig. 2 – Energy Benchmark Data
Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive
Summary Table with the energy analyst’s best opinion of probable cost, savings, and investment returns.
Be aware that the measures are not additive because of the interrelation of several of the measures. The
cost of each measure for this level of auditing is ± 30% until detailed engineering, specifications, and hard
proposals are obtained. See section VIII for detailed descriptions of all cost effective ECMs.
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Table 1 – Recommended Energy Conservation Measures, Glacier View School
Executive Summary – Recommended ECMs
Glacier View School
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
GVS-1a Refrigerators Replace residential & light
commercial refrigerators/freezers
older than 5 years old
-- - <10
GVS-2 Setback
Thermostat
Implement a heating temperature
unoccupied setback to 60.0 deg F
for the School
$4,902 $3,600 18.48 1.4
GVS-3 Ventilation Install carbon dioxide sensors for
demand ventilation control
$2,395 $8,000 4.06 3.3
GVS-4 Lighting:
Restrooms
Add new occupancy sensors. $34 $300 1.67 8.8
GVS-5 Lighting:
Locker
Rooms
Add new occupancy sensors $76 $700 1.59 9.2
GVS-6 Lighting:
Corridors
Replace the Metal Halide light
fixture, and keyed wall switches.
Add new occupancy sensors.
$252 $2,410 1.48 9.6
GVS-7 Lighting:
Office
Add new occupancy sensors $88 $910 1.43 10.3
GVS-8 Lighting:
Classrooms
Add new occupancy sensors to
(3) classrooms
$43 $450 1.39 10.5
GVS-9 Lighting:
Custodian
and Storage
Rooms
Replace T12 lighting with T8
fixtures, and add new occupancy
sensors.
$71 $750 1.39 10.6
GVS-10 Lighting:
MPR and
Stage
Replace MPR high bay lighting
with T5HO fixtures. Replace
incandescent lamps with
Parabolic Aluminized Reflector
LED lamps.
$1,006 $11,600 1.27 11.5
GVS-11 Air
Tightening
Perform air sealing to reduce air
leakage by 20%
$1,397 $11,000 1.18 7.9
Notes:
a Due to advances in refrigerators in the previous 5 years, new Energy Star refrigerators are much more efficient and
result in viable energy savings.
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Table 2 – Recommended Energy Conservation Measures, Generator Storage Shed
Executive Summary – Recommended Energy Conservation Measures (ECMs)
Generator Storage Shed (GSS)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
GSS-1 Turndown
Thermostat
Turndown the thermostat
to 55.0 deg F for the
Generator Shed
$247 $1 - 0
GSS-2 Air
Tightening
Perform air sealing to
reduce air leakage by 20%.
$38 $300 1.07 7.9
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II. Introduction
This energy audit was conducted at Glacier View K-12 School (GVS) for AHFC and Matanuska-Susitna
Borough School District. The school is a 21,027 square foot (sf) campus that includes a 20,835 sf school
and a 192 sf generator storage building. The school areas include classrooms, locker rooms, restrooms,
administrative offices, a library, and a multipurpose room. The location of the school is shown in the
following regional and overhead images. The energy audit was conducted in order to evaluate areas and
equipment where energy savings can be realized. The savings are then compared to a baseline and
evaluated for reasonable project financial ratios and payback.
Fig. 3 – Glacier View K-12 School, Alaska – Google Maps
Fig. 4 – Glacier View School – Google Maps
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III. Energy Audit Process
Prior to visiting the school, the first task was to collect and review two years of utility data for electricity
and fuel oil usage. This information was used to analyze operational characteristics, calculate energy
benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to
monitor the effectiveness of implemented energy conservation measures. A spreadsheet was used to enter,
sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary
benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see
Section VI).
After gathering the utility data and calculating the EUI, the next step in the audit process was to review
the architectural and engineering drawings to develop a building profile which documented building age,
type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating,
and Air Conditioning (HVAC), water heating, refrigeration, and etc. The building profile is utilized to
generate, and answer, all possible questions regarding the facility’s energy usage. These questions were
then compared to the energy usage profiles developed during the utility data gathering step. After this
information was gathered, the next step in the process was to conduct a site survey.
A site survey was completed on March 12, 2012. The audit included inspecting the building systems that
impact energy consumption and answering questions from the preliminary review of the school. The on-
site contact during the investigation was Mr. Rick Jensen of the MSBSD Maintenance Department1. The
following information was also collected while on site: occupancy schedules, O&M practices, building
energy management program, and other information that has an impact on energy consumption.
The following energy audit includes an evaluation of the information gathered, the researching of possible
conservation opportunities, organizing the energy audit into a comprehensive report, and making ECM
recommendations for mechanical, electrical, and building envelope improvements.
1 Mr. Rick Jensen, (907) 354-0348 (mobile), (907) 864-2007 (office)
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IV. Method of Analysis
Having completed the preliminary energy audit tasks, Coffman Engineers, Inc., (CEI) conducted a site
survey. The site survey provides critical input in deciphering where energy savings opportunities exist
within a facility. The audit team from CEI walked the entire site to inventory and investigate the building
envelope and major equipment, including: HVAC, water heating, lighting, and equipment located in
locker rooms, the kitchen, the library, the multipurpose room, offices, and classrooms. An understanding
of how the equipment is used is determined during the site survey.
The collected data was entered into AkWarm Commercial™ software, an energy calculating program for
buildings. The data was processed by AkWarm to model a baseline from which ECMs could be
considered. The model was compared to actual utility costs to ensure the quality of the baseline and
proposed energy modeling performed by AkWarm. The recommended ECMs focus on the building
envelope, HVAC, lighting, water heating, and other electrical measures that will reduce annual energy
consumption.
ECMs are evaluated based on building use and processes, local climate conditions, building construction
type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment
is proposed, energy consumption is calculated based on the manufacturer’s cataloged information. Energy
savings are calculated by AkWarm.
Implementation of more than one ECM often affects the savings of other ECMs. The savings may in
some cases be relatively higher for an ECM implemented individually than when that ECM is just one of
multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient
lighting systems may result in a given savings. Also implementing a more efficient lighting system will
add to the savings, but less than the efficient lighting would alone because there is less energy to be saved
when the lights are on a reduced operating schedule. Thus, if multiple ECM’s are recommended, the
combined savings are calculated and identified appropriately in groups.
In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM,
which is based on the typical life of the equipment being replaced or altered. The energy savings are
extrapolated throughout the simple lifetime of the ECM. The total energy savings is calculated as the total
lifetime multiplied by the yearly energy savings.
The cost savings and installation costs are used to calculate simple payback2 and the Savings to
Investment Ratio3 (SIR). These are listed in Appendix D and summarized in the Executive Summary
Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed
cost. Cost savings is calculated based on the historical energy costs for the building. Installation costs
include labor and equipment to evaluate the initial investment required to implement an ECM. These are
applied to each recommendation with simple paybacks calculated. The energy analyst’s opinions of
probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors
and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net
savings.
2 The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost
divided by Savings).
3 Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is
how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over
the life of the measure minus PV of maintenance costs.
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V. Building Description
Glacier View School is a single story building with a heated outbuilding housing an emergency generator.
The school was originally built in 1981. The school building square footage was dramatically expanded in
1995 with the addition of classrooms, administrative offices, a library, a technology room, a music room
and stage. A floor plan of the school building is shown in Figure 3 below.
Fig. 5 – Glacier View School Floor Plan
Glacier View School is occupied by approximately 55 people from 7 a.m. until 4 p.m., five days a week
during the school year with afterschool activities lasting until 8pm. The school building is open on
weekends for school sports and community activities. The MSBSD school year starts in August and ends
in May.
There are three additional buildings on the property. Two of the buildings are not heated and provide the
school with cold storage space. The third building is a 16’x12’ generator storage shed that is heated by an
electric unit heater supplied from the school’s main electric supply. There is no regular occupancy of any
of these buildings. A separate model was created in AkWarm to investigate energy savings for the
generator storage shed. Results from this AkWarm model are presented in Appendix E.
V.I Architectural Description
Details of the wall, floor and roof construction were obtained from the architectural drawings. Most of the
school building walls are constructed of 2x4 metal studs on 24” centers with R-13 fiberglass batt
insulation infill, 1/2” plywood sheathing, 2” rigid insulation, 1-1/4” air space, and 4” brick veneer for a
composite R-value of R-21. Exterior walls surrounding the original construction are constructed of 8”
concrete masonry unit (CMU) block wall, 3/4” air space, 2x6 metal studs on 24” centers with R-19
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fiberglass batt insulation infill, 1/2” plywood sheathing, 2” rigid insulation, 1-1/4” air space, and 4” brick
veneer for a composite R-value of R-25.9. An approximately 4’ earth berm surrounds the original
construction building along the north face of the school. Exterior, below-grade walls in this section are
comprised of an existing 8” concrete masonry unit (CMU) block wall and 2” rigid insulation overlaid
with 6” CMU blocks for a composite R-value of R-13.2. There is a total of 9,365 sf of total wall area.
The school has 4” thick concrete slab-on grade floors with 2” rigid foam insulation, which begins below
the slab edge and extends down to a depth of 4’ below grade. The estimated R-value of the floor is R-8.6.
There is approximately 19,925 sf of slab-on grade footprint area. The total usable square footage of the
school, 21,027 sf, is greater than the building footprint as the school has two second floor fan rooms and a
heated 192 sf generator storage shed.
The roof is constructed of a metal deck covered by 5/8” gypsum wall board, 3.5” rigid insulation, 2x4
horizontal furring with 1.5” rigid insulation infill and a standing seam metal roof. While the roof
insulation could not be accessed, it was estimated that the composite R-value for the roof system is R-
28.4. The flat roof over the multipurpose room is constructed of a steel deck over steel joists, a vapor
barrier, a roofing membrane, 5/8” gypsum wall board sheathing and 5” rigid insulation under concrete
pavers for an estimated R-value of R-28.5. There is approximately 24,104 sf of roof area which is larger
than the building footprint due to a sloped roof.
Typical window construction consists of double pane windows with 1/2” air space and wood frames.
Both fixed and operable windows were observed. The windows were installed in 1995 and are
approximately 17 years old. The weather stripping and gaskets around the majority of the operable
windows throughout the building were in good condition. An insulating value of R-2.0 was estimated for
the windows. There is a total of 1,437 sf of window area, with 588 sf of south facing window area.
Glacier View K-12 School has eight solid, insulated, metal doors with an estimated R-value of R-2.7.
There are seven insulated metal doors with quarter lite windows for an estimated R-value of R-2.0. The
school entrances contain a total of four metal doors with half-light glass for an R-value of R-1.7. There is
a total of 399 sf of door area.
V.II Mechanical Description
The school building is heated with two oil-fired Weil-McLain 878-WF boilers, each with an input rating
of 990 MBH. The heating system medium is glycol. Conduction and infiltration heating loads are
accomplished with radiant floor panels and a perimeter baseboard heating system with cabinet unit
heaters and horizontal unit heaters where required. An eave heat trace system is supplied with heated
glycol from the central heating system to provide snow melt for the roof. Ventilation heating is provided
by heating coils using glycol, which is heated by the central heating. No mechanical cooling is provided
for any systems in the facility.
Fuel oil is stored in a buried 2,000 gallon storage tank and a 50 gallon above grade day tank. The buried
tank serves the day tank which provides fuel oil to the heating equipment.
Heating water is circulated throughout the building’s hydronic systems, including terminal units, radiant
floor panels and heating coils, by four heating water circulation pumps. CP-1, CP-1A, CP-2 and CP-2A
are 1.5 HP, inline pumps that supply hydronic heating water. CP-3 and CP-4 are 3/4 HP, inline pumps
that provide boiler bypass.
Domestic hot water for the building is supplied by two oil-fired PVI 5.0-N-125-A-O water heaters each
with a storage capacity of 125 gallons and an input of 720 MBH. An electric State PV-40-20RT water
heater with a storage capacity of 40 gallons and an input of 4.5 kilowatt (kW) provides domestic hot
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water to the kitchen at 140 deg F. Domestic hot water is recirculated throughout the building using a
Grundfos UP15-18-SF pump.
There are four air handling units (AHU) that provide tempered ventilation air to the classrooms and
offices, multipurpose room, kitchen, and the technology room. The classrooms and offices are served by
AHU-1, a variable air volume unit equipped with a 10 horsepower (HP) VFD-controlled motor. It is
capable of serving up to 12,600 cubic feet per minute (CFM) of conditioned air. AHU-2 is a constant
volume unit equipped with a 3 HP motor serving approximately 7,000 CFM of air to the multipurpose
room. AHU-3 is a make-up air unit for the kitchen and is equipped with a 1.5 HP motor serving 2,250
CFM of air to the space. AHU-4 is a make-up air unit for the technology room and is equipped with a 3
HP motor serving 4,000 CFM of air to the space. All of the AHUs utilize hydronic heating coils to heat
the supply air. VF-1 is a 3/4 HP fan located in the boiler room which provides approximately 2,200 CFM
of ventilation air to the space. A detailed list of all fans within the school is provided in Appendix C.
The school’s building energy management and control system is a hybrid system. Top level control is
provided through direct digital control (DDC), which controls the pneumatic system with DDC electro-
pneumatic transducers. The system has been well maintained and appeared to be in good working order.
However, it was noticed that several of the 3-way pneumatic control valves showed minor glycol leakage
around their valve stems. Pneumatic systems, however, are considered outdated due to the vast
improvements in monitoring, control and operating efficiencies available from the modern genre of
electronic control systems.
V.III Electrical Description
The school is served by a 400 Amp (A), 120/240 Volt (V), single-phase, three-wire, underground
electrical service connected to a pad-mounted utility transformer. The school has a standby diesel
generator used to power selected loads in the event of a power outage. Single phase power is used for
receptacle loads, lighting, computers, and kitchen equipment. Two 25-HP Phasemaster™ rotary phase
converters are used to convert the single-phase electricity to three phase electricity to serve large
mechanical loads. These units are typically 95% efficient at full load.
The school is primarily illuminated by fluorescent T8 light fixtures with electronic ballasts. Two and
three-lamp T8 fixtures are the primary lighting source for the classrooms and shop. All of the three-lamp
fixtures have bi-level switching and most of these fixtures have occupancy sensor control. The lighting
throughout the classroom spaces was slightly in excess of the values recommended by the Illumination
Engineering Society of North America (IESNA) and the three lamp fixtures may be converted to two-
lamp fixtures with no loss in the performance of the space.
The corridors, vestibules, and the main lobby area are illuminated by a mix of metal halide (MH), and
compact fluorescent lamp CFL down lights, and 4' and U-lamp T8 fluorescent fixtures. The MH fixture
was observed to be in poor condition. The corridor lighting circuits are typically small and controlled by
keyed wall mounted switches. The number of keyed switches make it inconvenient for the custodial staff
to switch the corridor fixtures so lights are left on for long periods of time even if the space is unoccupied.
The multi-purpose room (MPR) is illuminated by 400W MH light fixtures. The lights are controlled by a
bank of keyed wall switches. Due to the long strike times associated with MH fixtures, these fixtures
typically remain on for convenience even if the space is unoccupied for extended periods.
The building mounted exterior lighting consists of 70W wall pack and 100W canopy light fixtures. Area
lighting is provided by 400W pole-mounted fixtures. All of the lighting is high pressure sodium (HPS).
These lights are controlled by an on/off photo switch that turns the lights off during the day and a timer
that shuts the lights off between 9:30 PM and 7:00 AM..
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Other electricity-using equipment not previously described in the mechanical or electrical sections include
a shop tools, microwaves, various kitchen equipment, and various user equipment such as projectors,
computers, and printers.
V.IV Generator Storage Shed Description
The school campus includes a 192 sf heated generator storage shed that is heated year round by an electric
unit heater. The generator shed is not a regularly occupied space. A separate AkWarm model was created
for the generator storage shed. The recommended ECMs for the generator storage shed are located in
Appendix E.
The generator storage shed housing an Emerson Diesel A.C. generator is 12’ x 16’, with wall construction
consisting of 2x6 walls, 8’ in height, with R-19 batt insulation and wood siding for a composite R-value
of R-16.7. The floor consists of plywood sheathing on 4x6 floor joists with no insulation for an R-value
of R-5.8. The roof construction consists of roofing shingles, plywood sheathing, and 2x8 framing with a
layer of R-25 batt insulation for an estimated insulating value of R-26.3. The only door to the shed is a
3’x 7’ windowless, insulated, hollow metal door with an estimated R-value of R-3.2. The shed is heated
by an electrical, wall mounted unit heater with a dial thermostat. The space is provided an electrical
service from the adjacent school building to power the unit heater, convenience receptacles, and two
incandescent light fixtures.
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VI. Historic Energy Consumption and Cost
Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and fuel oil
energy usage for the surveyed facility from January 2009 to December 2010. Matanuska Electric
Association provides the electricity and Marathon provides the fuel oil to the building. Both utility
companies bill the facility using a commercial rate schedule. The actual utility bills were not provided to
be able to verify the data received to assure 100 percent accuracy of the data.
The AkWarm model of the facility was built to match the facility’s average annual electric and heating oil
consumption, so that a realistic model could be created. The monthly energy consumption of the AkWarm
model matches the actual average monthly consumption of the facility within 25%, which is adequate for
this level of modeling. Overall, the energy consumption trends of the AkWarm model and the actual
facility match appropriately. Graphical representations of the monthly energy consumption are included
in Appendix A.
VI.I Electrical Consumption Data
The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage
charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the
customer's usage as measured in kilowatt-hours (kWh). The usage (kWh) is determined by load wattage
divided by 1,000, times hours running. For example, a 1,000 watt space heater operating for one hour will
use 1 kWh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp
operating for 10 hours. One kWh is equivalent to 3,413 BTU. Utility data used in this report reflects the
historical data provided for the building in a summarized format.
VI.II Fuel Oil Consumption Data
The fuel oil company delivers fuel monthly to fill the tanks and charges for gallons delivered. The
average heat value of fuel oil #2 is 132,000 BTUs per gallon. Fuel oil is sold to the customer in units of
gallons which is equal to approximately 1.32 Therms of energy, or 132,000 BTUs.
VI.III Overall Energy Consumption Data
The overall cost for energy use is calculated by dividing the total cost by the total usage. Based on the
electric and fuel oil utility data provided, the average cost for the energy and consumption calculations at
the surveyed facility are summarized in the table below.
Table 3 – Energy Cost and Consumption Data
Energy Cost and Consumption Data
2009 2010 Average
Electric 0.14 $/kWh 0.12 $/kWh 0.13 $/kWh
#2 Fuel Oil 1.76 $/Gal 2.17 $/Gal 1.96 $/Gal
Total Cost $52,050 $47,759 $49,904
ECI 2.48 $/sf 2.27 $/sf 2.37 $/sf
Electric EUI 25.9 kBtu/sf 27.4 kBtu/sf 26.7 kBtu/sf
#2 Fuel Oil EUI 76.4 kBtu/sf 60.8 kBtu/sf 68.6 kBtu/sf
Building EUI 102.3 kBtu/sf 88.2 kBtu/sf 95.2 kBtu/sf
The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The
building square footage was calculated to be approximately 21,027 square feet. This area includes the
20,835 sf main school building in addition to the 192 sf heated generator storage shed.
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The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kBtu/sf) and can be
used to compare energy consumption of similar building types or to track consumption from year to year
in the same building. The EUI is calculated by converting annual consumption of all fuels used to Btu’s
and then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator
of the relative potential for energy savings. A comparatively low EUI indicates less potential for large
energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to
calculate and verify the gross area of the facility. The gross area was confirmed on the physical site
investigation.
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VII. Equipment Inventory and Photo Survey
Following the completion of the field survey a detailed equipment list was created and is attached as
Appendix C. The major equipment listed are considered to be the major energy consuming equipment in
the building whose replacement could yield substantial energy savings.
An approximate age was assigned to the equipment if a manufactured date was not shown on the
equipment’s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37,
Table 4, the service life for the equipment along with the remaining useful life in accordance to the
ASHRAE standard are also noted in the equipment list.
Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an
indication that maintenance costs are likely on the rise and more efficient replacement equipment is
available which will lower the operating costs of the unit. Maintenance costs should also fall with the
replacement.
Additionally, photos of various equipment and the building construction were taken during the site visit.
Several photos are included in Appendix F.
CEI made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This
is not a thermographic study, but rather just a few snapshots to illustrate easy-to-identify heat losses.
These thermographic photos are included in Appendix G.
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VIII. Energy Conservation Measures
The following ECMs described here have been calculated by AkWarm Commercial and considered by the
energy audit team as viable projects. ECMs provided below are considered to have viable financial ratios
(SIR>1) or to add value to the building or building operational profiles. For a full list of ECMs considered
and calculated by the energy audit team, including ECMs not recommended at this time, please see
Appendix D.
VIII.I School Energy Conservation Measures
ECM# GVS-1 – Replace residential & light commercial refrigerators/freezers older than 5 years
old
Annual Energy Savings Installed Cost SIR Payback (years)
---<10 years
Due to advances in refrigerators in the previous five years, new Energy Star residential-type and light
commercial-type refrigerators and freezers are much more efficient and result in viable energy savings.
Built-in refrigerators and freezers should be evaluated independently. Replacing existing refrigerators,
which are older than five years old, with new energy star models will typically have paybacks of less than
10 years.
ECM# GVS-2 – Setback Thermostat for School
Annual Energy Savings Installed Cost SIR Payback (years)
$4,902 $3,600 18.48 1.4
Significant energy savings exist by reducing the room temperatures in the school during unoccupied
times. By reducing the temperature of these spaces to 60°F during unoccupied times, the heating load
required will be reduced. The cost of this ECM includes the cost of replacing 18 existing thermostats with
new programmable thermostats and programming them with a night setback at a cost of $200 per
thermostat. See items 1, 2, and 3 in Appendix D for more information.
ECM # GVS-3– Install Carbon Dioxide Sensors
Annual Energy Savings Installed Cost SIR Payback (years)
$2,395 $8,000 4.06 3.3
A large portion of the building’s heating load is comprised of heating outside air (OA) brought into the
building for ventilation and indoor air quality purposes. Using CO2 sensors and demand ventilation
control to reduce outside air rate will result in significant energy savings. Currently, AHU-1 and AHU-2
have a minimum of 15% OA rates. With demand ventilation control, OA rates will vary from 0% - 100%
based on indoor air quality conditions. During unoccupied or low occupancy periods, outdoor air
ventilation rates for AHU-1 and AHU-2 would adjust proportionally to the occupancy rates within the
classrooms and multipurpose spaces respectively. The cost of this ECM includes the cost of installing two
CO2 sensors, connecting the sensors to the existing DDC system, and the cost for a DDC system
contractor to program the DDC system to read the sensors. A DDC contractor will need to evaluate the
existing DDC system to determine if other infrastructure improvements are necessary. See item 4 in
Appendix D for more information.
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ECM # GVS-4 –Upgrade Restroom Lighting Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$34 $300 1.67 8.8
There are (9) restroom areas in the building, (7) are small single toilet restrooms and (2) are large multi-
stall rooms. The lighting in these areas consists of (7) two-lamp T8 fixtures that are controlled by wall
mounted rocker switches, and (6) two-lamp T8 fixtures that are controlled by wall mounted keyed
switches. It is recommended that one ceiling mounted occupancy sensor be installed in each large
restroom. Installing occupancy sensors in the small restrooms was not shown to provide an SIR greater
than 1. See items 11 & 26 in appendix D for more information.
ECM # GVS-5 – Upgrade Locker Room Lighting Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$76 $700 1.59 9.2
The locker rooms are illuminated by approximately (15) two-lamp T8 light fixtures that are controlled by
wall mounted keyed switches. It is recommended that two ceiling mounted occupancy sensors are
installed in each locker room for lighting control. The sensors would control the lighting unless
overridden off by the keyed switches. See item 12 in Appendix D for more information.
ECM# GVS-6 - Corridor Lighting and Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$252 $2,410 1.48 9.6
The lighting in the corridors consists of (1) recessed 32W MH down light fixture, (2) recessed two-lamp
26W CFL down light fixtures, (22) two-lamp T8 fixtures, (10) three-lamp T8 fixtures, and (1) 2'x2' T8
troffer with two U-lamps. An occupancy sensor is used to control three of these fixtures, wall mounted
rocker switches are used to control 13 fixtures, while the remaining 20 fixtures are controlled by wall
mounted keyed switches. It is recommended that the MH down light is replaced by a LED down light of
about 17W. It is also recommended that the five keyed wall switches are replaced by wall mounted rocker
switches, and that approximately (6) new ceiling mounted occupancy sensors are installed to control the
corridor lighting. See items 6, 7, 8, 14, 15, 17, 21, and 32 in Appendix D for more details.
ECM # GVS-7 – Upgrade Office Lighting Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$88 $910 1.43 10.3
One of the offices was observed to use an occupancy sensor for lighting control, the remaining (7) offices
were observed to use wall mounted rocker switches for lighting control. Due to the occupancy of the
reception office, it is not recommended that this space be provided with an occupancy sensor for lighting
control. However, one ceiling mounted occupancy sensor should be installed in each of the other (6)
offices that are controlled by wall switches. See items 5, 13, 16, and 20 in Appendix D for more
information.
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ECM # GVS-8 – Upgrade Classroom Lighting Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$43 $450 1.39 10.5
Illumination in the classrooms and music practice rooms is provided by (3) recessed two-lamp 26W CFL
down lights, (29) two-lamp T8 fixtures, (73) three-lamp T8 fixtures, and (2) four-lamp T8 fixtures. Of
these fixtures, (17) two-lamp fixtures are used to illuminate the school's shop room, and (2) four-lamp
fixtures illuminate the small home economics kitchen. Occupancy sensors are used to control all of the
CFL fixtures, (9) of the two-lamp T8 fixtures, and (65) of the three-lamp fixtures in (7) rooms. The rest of
the fixtures in the remaining (8) rooms use wall mounted rocker switches for lighting controls. It is
recommended that (2) new ceiling mounted occupancy sensors are installed in rooms 129 and 154 to
control (7) three-lamp fixtures with bi-level control, and that the wall switched three-lamp fixture in room
147 is switched with the rest of the local occupancy sensor controlled lighting circuit. CEI recommends
against installing new occupancy sensors in the shop and home economics rooms due to safety hazards
posed by nuisance tripping. See items 9 and 24 in Appendix D for more information.
Additional upgrades were considered for this ECM, including adding new occupancy sensors for lighting
control in the practice rooms, and retrofitting the three-lamp T8 fixtures with two-lamp T8 volumetric
troffer kits. However due to the relatively high costs, these did not have an SIR's above 1.0 and were
eliminated.
ECM # GVS-9 – Upgrade Custodian and Storage Room Lighting and Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$71 $750 1.39 10.6
The lighting in the custodian's office is provided by (3) two-lamp T12HO light fixtures. The (2) storage
rooms are illuminated by (7) two-lamp T8 fixtures. The (3) T12 fixtures and (1) of the T8 fixtures are
controlled by wall mounted rocker switches, the remaining (6) fixtures are controlled by an occupancy
sensor. It is recommended that the T12 fixtures are replaced one-for-one by two-lamp T8 fixtures of
similar type, and that (1) ceiling mounted occupancy sensor be installed in both the custodian's office and
the storage room for lighting control. See items 10 and 33 in Appendix D for more information.
ECM # GVS-10 – Upgrade MPR and Stage Lighting and Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$1,006 $11,600 1.27 11.5
The MPR is illuminated by (14) 400W MH high bay light fixtures that are controlled by a bank of keyed
wall switches. Because of the long strike time associated with MH lamps, the fixtures are usually left on
all day even if the space is un-occupied for long periods. The adjacent stage is illuminated by (8) 150W
incandescent light fixtures that are also controlled by keyed wall switches. It is recommended that the MH
high bay fixtures are replaced one-for-one with six-lamp T5HO light fixtures and that an occupancy
sensor control system is installed in the MPR. The stage lighting should also be upgraded by re-lamping
the 150W incandescent lamps with LED PAR 38 lamps. See items 18 and 22 in Appendix D for more
information.
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ECM# GVS-11 – Perform Air Sealing to Reduce Air Leakage by 20%
Annual Energy Savings Installed Cost SIR Payback (years)
$1,397 $11,000 1.18 7.9
Unconditioned infiltration air, leaking through doors, windows, and other building envelope penetrations
contributes to the heating load of the building. Methods to decrease the air infiltration into the building
include: sealing around roof and wall penetrations with caulking and insulation, gasketing mechanical
louvers or hoods, providing gaskets to all exterior cover plates, and adding weather stripping around
exterior doors and operable windows. To achieve a viable economic benefit, $10,000 can be invested and
still achieve an SIR >1 by reducing air leakage by 20%. Details of the ECM are shown in item 19 in
Appendix D.
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VIII.II Generator Storage Shed ECMs
ECM# GSS-1 – Turn Down Thermostat
Annual Energy Savings Installed Cost SIR Payback (years)
$247 $1 -0
Significant energy savings exist by reducing the room temperature of the unoccupied storage shed. By
reducing the temperature of the space to 55°F, the heating load required by the space will be reduced. The
cost assigned to this ECM includes the cost of the building operations staff lowering the unit heater
thermostat from 65°F to 55°F. See item 1 in Appendix E for more information.
ECM# GSS-2 – Perform Air Sealing to Reduce Air Leakage by 20%
Annual Energy Savings Installed Cost SIR Payback (years)
$38 $300 1.07 7.9
By tightening the building envelope with air sealing improvements, infiltration into the generator storage
shed will be reduced. This in turn will reduce the heating load required by the shed and reduce the amount
of electricity being used by the unit heater. While a blower door test was not completed, it is anticipated
that air leakage is occurring around the door, through spaces between the batt insulation in the roof, and
through wall penetrations. Methods to decrease the infiltration into the building include: installing a door
frame, sealing around the door with caulking and insulation, adding new weather stripping to the door,
providing gaskets to all exterior cover plates and sealing all roof and wall penetrations. To achieve a
viable economic benefit, $300 can be invested and still achieve an SIR ≥ 1by reducing air leakage by
20%. See item 2 in Appendix E for more information.
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VIII.III Administrative Controls for Energy Conservation and Optimization
While the intent of many energy conservation measures is to increase the efficiency of fuel-burning and
electrical equipment, an important factor of energy consumption lies in the operational profiles which
control the equipment usage. Such profiles can be managed by administrative controls and departmental
leadership. They determine how and when fuel-burning and electrical equipment are used, and therefore
have a greater impact on energy savings potential than simply equipment upgrades alone. Significant
energy cost savings can be realized when ECMs are combined with efficient-minded operational profiles.
Operational profiles may be outlined by organization policy or developed naturally or historically. These
profiles include, but are not limited to: operating schedules, equipment setpoints and control strategies,
maintenance schedules, and site and equipment selection.
Optimization of operational profiles can be accomplished by numerous methods so long as the intent is
reduction in energy-using equipment runtime. Due to the numerous methods of optimization, energy cost
savings solely as a result of operational optimization are difficult to predict. Quantification, however, is
easy to accomplish by metering energy usage during and/or after implementation of energy-saving
operational profiles and ECMs. Shown below are some examples which have proven successful for other
organizations.
Optimization of site selection includes scheduling and location of events. If several buildings in a given
neighborhood are all lightly used after regularly occupied hours, energy savings can be found when after-
hours events are consolidated and held within the most energy efficient buildings available for use. As a
result, unoccupied buildings could be shut down to the greatest extent possible to reduce energy
consumption.
Two operational behaviors which can be combined with equipment upgrades are operating schedules and
equipment control strategies including setpoints. Occupancy and daylight sensors can be programmed to
automatically shut off or dim lighting when rooms are unoccupied or sufficiently lit from the sun.
Operating schedules can be optimized to run equipment only during regular or high-occupancy periods.
Also, through a central control system, or with digital programmable thermostats, temperature setpoints
can be reduced during low-occupancy hours to maximize savings. In addition, sporadically used
equipment can be shut down during unoccupied hours to further save energy. In general, having
equipment operating in areas where no occupants are present is inefficient, and presents an opportunity
for energy savings.
Operational profiles can also be implemented to take advantage of no- or low-cost ECMs. Examples
include heating plant optimizations (boiler section cleaning, boiler flush-through cleaning) and tighter
controls of equipment setbacks and shutdowns (unoccupied zones equipment shutdown, easier access to
and finer control of equipment for after-hours control). In a large facility management program,
implementation of these measures across many or all sites will realize dramatic savings due to the
quantity of equipment involved.
Changes to building operational profiles can only be realized while simultaneously addressing health,
safety, user comfort, and user requirements first. It is impractical to expect users to occupy a building or
implement operational behaviors which do not meet such considerations. That said, it is quite practical for
management groups to implement administrative controls which reduce losses brought about by excess
and sub-optimum usage.
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Appendix A
Energy Benchmark Data
Glacier View K12 School Draft Energy Audit Report
First Name Last Name Middle Name Phone
Rick Jensen 907-376-0806
State Zip
AK 99645
Monday-
Friday
Saturday Sunday Holidays
24-7 24-7 24-7 24-7
Average # of
Occupants
During
55 20 20 20
Renovations / Notes
Date
20,835 sf
192 sf
Original 1981 building plus 1995 addition
Generator Building
99674
Email
ricky.jensen@matsuk12.us
Details
65975 S. Wolverine Cir.
Contact Person
City
Palmer501 N. Gulkana St
Mailing Address
Primary
Operating
Hours
Sutton
REAL Preliminary Benchmark Data Form
PART I – FACILITY INFORMATION
Facility Owner
Mat-Su School District
21,027
Building Square Footage
Facility Owned By Date
03/09/11Municipal Government/Subdivision
Building Name/ Identifier Building Usage
Education
Facility Address
Building Type
School
Glacier View K-12
Year Built
1995
Facility Zip
88,379
Community Population
Facility City
192 sf
21,027 sf
PART II – ENERGY SOURCES
Heating Oil Electricity Natural Gas Propane Wood Coal
$ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton
Other energy
sources?
Describe
2. Provide utilities bills for the most recent two-year period for each energy source you use.
Total
1. Please check every energy source you use in the table below. If known, please enter the base rate you pay
for the energy source.
Generator Building
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Glacier View K12 School Draft Energy Audit Report
Glacier View K12
Buiding Size Input (sf) =21,027
2009 Electric Consumption (kWh)159,440
2009 Electric Cost ($)22,808
2009 Oil Consumption (Therms)16,065
2009 Oil Cost ($)29,242
2009 Total Energy Use (kBtu)2,150,648
2009 Total Energy Cost ($)52,050
Annual Energy Use Intensity (EUI)
2009 Electricity (kBtu/sf)25.9
2009 Oil (kBtu/sf) 76.4
2009 Energy Utilization Index (kBtu/sf)102.3
Annual Energy Cost Index (ECI)
2009 Electric Cost Index ($/sf)1.08
2009 Oil Cost Index ($/sf)1.39
2009 Energy Cost Index ($/sf)2.48
2010 Electric Consumption (kWh)168,960
2010 Electric Cost ($)19,932
2010 Oil Consumption (Therms)12,7792010 Oil Consumption (Therms)12,779
2010 Oil Cost ($)27,828
2010 Total Energy Use (kBtu)1,854,513
2010 Total Energy Cost ($)47,759
Annual Energy Use Intensity (EUI)
2010 Electricity (kBtu/sf)27.4
2010 Oil (kBtu/sf)60.8
2010 Energy Utilization Index (kBtu/sf)88.2
Annual Energy Cost Index (ECI)
2010 Electric Cost Index ($/sf)0.95
2010 Oil Cost Index ($/sf)1.32
20010 Energy Cost Index ($/sf)2.27
Note:
1 kWh = 3,413 Btu's
1 Therm = 100,000 Btu's
1 CF ≈ 1,000 Btu's
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Glacier View K12 SchoolDraft Energy Audit ReportGlacier View K12ElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)MEA E27001 Jan-09 12/28/2008 1/27/20093016,480562$2,580$0.16MEA E27001 Feb-09 1/27/2009 2/25/20092916,160552$2,531$0.16MEA E27001 Mar-09 2/25/2009 3/25/20092813,600464$2,139$0.16MEA E27001 Apr-09 3/25/2009 4/27/20093317,040582$2,446$0.14MEA E27001 May-09 4/27/2009 5/27/20093014,320489$2,065$0.14MEA E27001 Jun-09 5/27/2009 6/28/2009324,080139$625$0.15MEA E27001 Jul-09 6/28/2009 7/28/2009304,160142$608$0.15MEA E27001 Aug-09 7/28/2009 8/27/20093011,120380$1,536$0.14MEA E27001 Sep-09 8/27/2009 9/28/20093215,200519$2,078$0.14MEA E27001 Oct-09 9/28/2009 10/27/20092915,120516$1,986$0.13MEA E27001 Nov-09 10/27/2009 11/29/20093317,760606$2,322$0.13MEA E27001 Dec-09 11/29/2009 12/27/20092814,400491$1,894$0.13MEA E27001 Jan-10 12/27/2009 1/26/20103016,640568$2,022$0.12MEA E27001 Feb-10 1/26/2010 2/22/20102716,720571$2,032$0.12MEA E27001 Mar-10 2/22/2010 3/28/20103421,760743$2,626$0.12MEA E27001 Apr-10 3/28/2010 4/27/20103019,440663$2,191$0.11MEA E27001 May-10 4/27/2010 5/26/20102916,160552$1,831$0.11MEAE27001Jun-105/26/20106/29/2010343,920134$483$0.12MEAE27001Jun-105/26/20106/29/2010343,920134$483$0.12MEA E27001 Jul-10 6/29/2010 7/27/2010283,440117$433$0.13MEA E27001 Aug-10 7/27/2010 8/28/2010329,840336$1,147$0.12MEA E27001 Sep-10 8/28/2010 9/27/20103013,360456$1,535$0.11MEA E27001 Oct-10 9/27/2010 10/26/20102915,040513$1,780$0.12MEA E27001 Nov-10 10/26/2010 11/28/20103317,280590$2,036$0.12MEA E27001 Dec-10 11/28/2010 12/27/20102915,360524$1,816$0.12Jan - 09 to Dec - 09 total:159,4405,4420$22,808$0Jan - 10 to Dec - 10 total:168,9605,7670$19,932$0$0.14$0.12Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Coffman Engineers, Inc.AkWarm No. CIRIJVMCAEC01Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Glacier View K12 SchoolDraft Energy Audit Report$1,000$1,500$2,000$2,500$3,00010,00015,00020,00025,000Electric Cost ($)Electric Consumption (kWh)Glacier View K-12 - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$50005,000Date (Mon - Yr)Coffman Engineers, Inc.AkWarm No. CIRIJVMCAEC01Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Glacier View K12 SchoolDraft Energy Audit ReportGlacier View K12OilBtus/Gal =132,000Provider Customer # Month Start Date End Date Billing Days Consumption (Gal) Consumption (Therms) Demand Use Oil Cost ($) Unit Cost ($/Therm) Demand Cost ($)MARATHONFO-GVE Jan-09 1/1/2009 2/1/2009312,2692,995$4,8841.63MARATHONFO-GVE Feb-09 2/1/2009 3/1/2009281,8982,505$4,0841.63MARATHONFO-GVE Mar-09 3/1/2009 4/1/2009311,7552,317$3,7781.63MARATHONFO-GVE Apr-09 4/1/2009 5/1/2009308751,155$1,8841.63MARATHONFO-GVE May-09 5/1/2009 6/1/200931264349$5691.63MARATHONFO-GVE Jun-09 6/1/2009 7/1/20093082108$1761.63MARATHONFO-GVE Jul-09 7/1/2009 8/1/20093157$111.64MARATHONFO-GVE Aug-09 8/1/2009 9/1/2009315775$1221.63MARATHONFO-GVE Sep-09 9/1/2009 10/1/200930336444$7241.63MARATHONFO-GVE Oct-09 10/1/2009 11/1/2009317641,008$2,1482.13MARATHONFO-GVE Nov-09 11/1/2009 12/1/2009301,8912,496$5,3162.13MARATHONFO-GVE Dec-09 12/1/2009 1/1/2010311,9732,604$5,5462.13MARATHONFO-GVE Jan-10 1/1/2010 2/1/2010312,1012,773$5,9062.13MARATHONFO-GVE Feb-10 2/1/2010 3/1/2010281,3611,796$3,8252.13MARATHONFO-GVE Mar-10 3/1/2010 4/1/2010311,4851,961$4,1752.13MARATHONFO-GVE Apr-10 4/1/2010 5/1/2010308411,110$2,3632.13MARATHONFO-GVE May-10 5/1/2010 6/1/201031307405$8632.13MARATHONFO-GVEJun-106/1/20107/1/20103089117$2492.13MARATHONFO-GVEJun-106/1/20107/1/20103089117$2492.13MARATHONFO-GVEJul-107/1/20108/1/2010312634$722.13MARATHONFO-GVEAug-108/1/20109/1/2010313445$962.13MARATHONFO-GVESep-109/1/201010/1/201030309407$8682.13MARATHONFO-GVEOct-1010/1/201011/1/201031559737$1,6802.28MARATHONFO-GVENov-1011/1/201012/1/2010309751,287$2,9322.28MARATHONFO-GVEDec-1012/1/20101/1/2011311,5962,106$4,7992.28Jan - 09 to Dec - 09 total:12,17016,0650$29,242$0Jan - 10 to Dec - 10 total:9,68112,7790$27,828$0Jan - 09 to Dec - 09 avg:2.40Jan - 10 to Dec - 10 avg:2.87Coffman Engineers, Inc.AkWarm No. CIRIJVMCAEC01Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Glacier View K12 SchoolDraft Energy Audit Report$2,000.00 $3,000.00 $4,000.00 $5,000.00 $6,000.00 $7,000.00 1,0001,5002,0002,5003,0003,500Oil Cost ($)Oil Consumption (Therms)Glacier View K-12 - Oil Consumption (Therms) vs. Oil Cost ($)Oil Consumption (Therms)Oil Cost ($)$0.00 $1,000.00 0500Date (Mon - Yr)Coffman Engineers, Inc.AkWarm No. CIRIJVMCAEC01Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix B
AkWarm Commercial Reports
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
School
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 3/23/2012 9:44 AM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Glacier View K-12 Auditor Company: Coffman Engineers, Inc.
Address: 65975 S. Wolverine Cir. Auditor Name: Walter Heins, PE, CCP, CxA, CEA
City: Sutton Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Rick Jensen
Client Address: 3901 E. Bogard
Wasilla, AK 99654
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 864-2007 Auditor Comment:
Client FAX:
Design Data
Building Area: 20,835 square feet
Note: This square footage does not include the generator
storage shed area.
Design Heating Load: Design Loss at Space: 503,624
Btu/hour
with Distribution Losses: 530,131 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 808,126 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 46 people Design Indoor Temperature: 70 deg F (building average)
Actual City: Sutton Design Outdoor Temperature: -18 deg F
Weather/Fuel City: Sutton Heating Degree Days: 10,451 deg F-days
Utility Information
Electric Utility: Matanuska Electric Assn. - Commercial -
Lg
Natural Gas Provider: None
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 School Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Other Electrical Cooking Clothes Drying Vent Fans Service Fees Total Cost Existing Building $26,237 $0 $2,341 $7,737 $8,706 $0 $0 $2,634 $0 $47,655 With Proposed Retrofits $17,540 $0 $2,341 $5,150 $8,706 $0 $0 $2,634 $0 $36,372 SAVINGS $8,697 $0 $0 $2,587 $0 $0 $0 $0 $0 $11,283
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 School $0 $2,000 $4,000 $6,000 $8,000 $10,000 $12,000 $14,000FloorWall/DoorWindowCeilingAirExistingRetrofitAnnual Space Heating Cost by Component
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 School Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Fuel Oil #2 (Right) Consumption (Orange).
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 School Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange).
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 School Monthly Modeled Consumption (Blue compared to Actual Fuel Oil #2 Consumption (Orange)
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Generator Storage Shed
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 3/20/2012 9:46 AM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Glacier View K-12 School - Generator Storage
Shed
Auditor Company: Coffman Engineers, Inc.
Address: 65975 S. Wolverine Cir. Auditor Name: Walter Heins, PE, CCP, CxA, CEA
City: Sutton Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Rick Jensen
Client Address: 3901 E. Bogard
Wasilla, AK 99654
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 864-2007 Auditor Comment:
Client FAX:
Design Data
Building Area: 192 square feet Design Heating Load: Design Loss at Space: 7,554
Btu/hour
with Distribution Losses: 7,554 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 11,516 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 0 people Design Indoor Temperature: 65 deg F (building average)
Actual City: Sutton Design Outdoor Temperature: -18 deg F
Weather/Fuel City: Sutton Heating Degree Days: 10,451 deg F-days
Utility Information
Electric Utility: Matanuska Electric Assn. - Commercial -
Sm
Natural Gas Provider: None
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 Generator Storage Shed Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building $804 $0 $0 $3 $0 $0 $0 $0 $0 $0 $807 With Proposed Retrofits $507 $0 $0 $1 $0 $0 $0 $0 $0 $0 $508 SAVINGS $297 $0 $0 $2 $0 $0 $0 $0 $0 $0 $299
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 Generator Storage Shed $0$50$100 $150 $200 $250 $300FloorWall/DoorWindowCeilingAirExistingRetrofitAnnual Space Heating Cost by Component
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix C
Major Equipment List
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE (HP) ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) B-1 BOILER RM BUILDING HEATING WEIL-MCLAIN 878-WF CAST IRON #2 FUEL OIL 990 MBH ≈ 84% - 30 ≈ 17 B-2 BOILER RM BUILDING HEATING WEIL-MCLAIN 878-WF CAST IRON #2 FUEL OIL 990 MBH ≈ 84% - 30 ≈ 17 HW-1 BOILER RM DOMESTIC HOT WATER PVI 5.0-N-125-A-O #2 FUEL OIL 125 GAL 86% - 15 0 HW-2 BOILER RM DOMESTIC HOT WATER PVI 5.0-N-125-A-O #2 FUEL OIL 125 GAL 86% - 15 0 WH-3 BOILER RM KITCHEN HOT WATER AMERICAN - ELECTRIC 45 GAL 100% - 15 0 CP-1 BOILER RM HEATING WATER CIRC GRUNDFOS UPC 65-160 INLINE 80GPM 34' 80% 1.5 10 0 CP-1A BOILER RM HEATING WATER CIRC GRUNDFOS UPC 65-160 INLINE 80GPM 34' 80% 1.5 10 0 CP-2 BOILER RM HEATING WATER CIRC GRUNDFOS UPC 65-160 INLINE 80GPM 34' 80% 1.5 10 0 CP-2A BOILER RM HEATING WATER CIRC GRUNDFOS UPC 65-160 INLINE 80GPM 34' 80% 1.5 10 0 CP-3 BOILER RM BOILER RECIRC GRUNDFOS UPC 50-160 INLINE 50GPM 20’ 80% 3/4 10 0 CP-4 BOILER RM BOILER RECIRC GRUNDFOS UPC 50-160 INLINE 50GPM 20’ 80% 3/4 10 0 CP-5 BOILER RM DOMESTIC HOT WATER RECIRC GRUNDFOS UP 15-18 SF INLINE 5GPM 5’ 80% 1/25 10 0 WP-1 WATER WELL WELL WATER LIFT JACUZZI 5S49012-S2 INLINE 80GPM 167’ 80% 5 10 0
Glacier View K-12 School Final Energy Audit Report Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE (HP) ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) AHU-1 FAN RM CLASSROOM SUPPLY TEMPTROL WF-DH24P CENTRIFUGAL 12,600CFM 2.5" ≈ 86% 10 25 8 AHU-2 FAN RM MPR SUPPLY TEMPTROL WF-DH17M CENTRIFUGAL 7,000CFM 1.5" ≈ 86% 3 25 8 AHU-3 ABOVE LOCKER RM KITCHEN MAKE UP TEMPTROL WF-DH5S CENTRIFUGAL 2,250CFM 1.5" ≈ 86% 1.5 25 8 AHU-4 FAN RM TECH RM SUPPLY TEMPTROL WF-DH8S CENTRIFUGAL 4,000CFM 1.5" ≈ 86% 3 25 8 VF-1 BOILER RM BOILER RM SUPPLY FARR 71600202 CENTRIFUGAL 2,200CFM 0.75" ≈ 86% 3/4 25 8 AC-1 BOILER RM PNEUMATIC SUPPLY INGERSOL RAND T30 AIR COMPRESSOR - ≈ 87% 1.5 20 9 EF-1 FAN RM MPR EXHAUST COOK 150 CPFB CENTRIFUGAL 2,710CFM 1.0" 66% 1.5 25 8 EF-2 ROOF TOP KITCHEN EXHAUST GREENHECK CUBE 160 CENTRIFUGAL 2,600CFM 1.0" ≈ 80% 1.0 25 8 EF-3 LEARNING STUDIO CLASSROOM EXHAUST GREENHECK BCF-110 CABINET 2,000CFM .75" ≈ 80% 3/4 25 8 EF-4 ROOF TOP FUME HOOD EXHAUST GREENHECK CUBE 100 CENTRIFUGAL 780CFM .75” ≈ 80% 1/4 25 8 EF-5 PAINT BOOTH WELDING EXHAUST CAR-MON CMB-122 CENTRIFUGAL 2,000CFM 1.0" ≈ 80% 1.0 25 8 EF-6 PAINT BOOTH PAINT BOOTH EXHAUST DEVILBLISS - PROPELLER 4,500CFM .65" ≈ 80% 1.0 15 0
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix D
Energy Conservation Measures
Glacier View K-12 School
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
The following tables consist of raw output data from the AkWarm Commercial program used to model
energy costs and calculate energy savings and financial ratios. These tables represent all of the energy
conservation measures calculated and considered by the energy audit team. However, ECMs included in
the Executive Summary and Section VIII are recommended by the energy audit team due to their viable
financial ratios (SIR>1) or due to their value added.
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback Thermostat:
Storage/Utility/Inter
mittent
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the
Storage/Utility/Intermittent
space.
$2,258 $1,000 30.64 0.4
2 Setback Thermostat:
Classroom/Office
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Classroom/Office
space.
$2,087 $1,800 15.73 0.9
3 Setback Thermostat:
Multipurpose
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Multipurpose space.
$557 $800 9.45 1.4
4 Ventilation Install Carbon Dioxide
Sensors
$2,395 $8,000 4.06 3.3
5 Lighting: Office Add new Occupancy
Sensor
$23 $160 2.14 6.8
6 Lighting: Corridor Add new Occupancy
Sensor
$63 $450 2.03 7.2
7 Lighting: Corridor Add new Occupancy
Sensor and Improve
Manual Switching
$23 $165 2.00 7.3
8 Lighting: Corridor Add new Occupancy
Sensor and Improve
Manual Switching
$119 $950 1.83 8
9 Lighting: Class Add new Occupancy
Sensor
$35 $300 1.72 8.5
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
10 Lighting: Custodian Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic and
Add new Occupancy
Sensor
$69 $600 1.69 8.6
11 Lighting: Restroom
Large
Add new Occupancy
Sensor
$34 $300 1.67 8.7
12 Lighting: Locker
Room
Add new Occupancy
Sensor and Improve
Manual Switching
$76 $700 1.59 9.2
13 Lighting: Office Add new Occupancy
Sensor
$12 $110 1.54 9.5
14 Lighting: Corridor Improve Manual Switching $5 $50 1.50 9.7
15 Lighting: Corridor Add new Occupancy
Sensor
$17 $170 1.47 9.9
16 Lighting: Office Add new Occupancy
Sensor
$30 $320 1.38 10.6
17 Lighting: Corridor Add new Occupancy
Sensor
$10 $115 1.33 11
18 Lighting: MPR/Gym Replace with 14 FLUOR
(6) T5 45.2" F54W/T5 HO
Standard (2) StdElectronic
and Add new Occupancy
Sensor
$955 $10,800 1.29 11.3
19 Air Tightening Perform air sealing to
reduce air leakage by 20%.
$1,399 $11,000 1.18 7.9
20 Lighting: Office Add new Occupancy
Sensor
$23 $320 1.07 13.6
21 Lighting: Corridor Add new Occupancy
Sensor and Improve
Manual Switching
$7 $110 0.99 14.8
22 Lighting: MPR Stage Replace with 8 LED 35W
Module StdElectronic
$51 $800 0.93 15.8
23 Lighting: Exterior
Building
Replace with 7 LED 50W
Module StdElectronic
$118 $2,100 0.82 17.7
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
24 Lighting: Class Replace with FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$8 $150 0.73 20
25 Lighting: Exterior
Building
Replace with 5 LED 35W
Module StdElectronic
$65 $1,500 0.63 23.2
26 Lighting: Restroom
Small
Add new Occupancy
Sensor
$40 $1,050 0.56 26.2
27 Lighting: Exterior
Site
Replace with 6 LED 150W
Module StdElectronic
$429 $12,000 0.52 28
28 Lighting: Class Replace with 7 FLUOR (2)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
$33 $1,050 0.47 31.4
29 Lighting: Class Replace with 65 FLUOR
(2) T8 4' F32T8 32W
Standard (2) Program
StdElectronic
$311 $9,750 0.47 31.4
30 Lighting: Class
Practice
Add new Occupancy
Sensor
$12 $450 0.38 38.3
31 Lighting: Class Add new Occupancy
Sensor
$4 $150 0.38 38.4
32 Lighting: Corridor Replace with LED 17W
Module StdElectronic and
Improve Manual Switching
$8 $400 0.29 50.2
33 Lighting: Storage Add new Occupancy
Sensor
$2 $150 0.17 85.3
34 Lighting: Utility Replace with 2 LED 20W
Module StdElectronic
$4 $350 0.15 97.2
TOTAL $11,283 $68,120 2.2 6
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
19 Air Tightness estimated as: 0.93
cfm/ft2 of above-grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 20%.
$11,000 $1,399
2. Mechanical Equipment
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 Storage/Utility/Inte
rmittent
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the
Storage/Utility/Intermittent
space.
$1,000 $2,258
2 Classroom/Office Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Classroom/Office
space.
$1,800 $2,087
3 Multipurpose Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Multipurpose space.
$800 $557
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
4 Install Carbon Dioxide Sensors $8,000 $2,395
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
5 Office 3 FLUOR (4) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$160 $23
6 Corridor 8 FLUOR (3) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching, Multi-Level Switch
Add new Occupancy
Sensor
$450 $63
7 Corridor 2 FLUOR (3) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor and Improve
Manual Switching
$165 $23
8 Corridor 16 FLUOR (2) T8 4' F32T8
32W Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor and Improve
Manual Switching
$950 $119
9 Class 7 FLUOR (3) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching, Multi-Level Switch
Add new Occupancy
Sensor
$300 $35
10 Custodian 3 FLUOR (2) T12 4'
F48T12/HO 60W Standard
Magnetic with Manual
Switching
Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic and
Add new Occupancy
Sensor
$600 $69
11 Restroom Large 6 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$300 $34
12 Locker Room 15 FLUOR (2) T8 4' F32T8
32W Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor and Improve
Manual Switching
$700 $76
13 Office 2 FLUOR (3) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$110 $12
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
14 Corridor 3 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching, Occupancy Sensor
Improve Manual Switching $50 $5
15 Corridor 3 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$170 $17
16 Office 6 FLUOR (3) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching, Multi-Level Switch
Add new Occupancy
Sensor
$320 $30
17 Corridor 2 FLUOR (2) CFL, Plug-in
26W Quad Tube (2)
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$115 $10
18 MPR/Gym 14 MH 400 Watt Magnetic with
Manual Switching
Replace with 14 FLUOR
(6) T5 45.2" F54W/T5 HO
Standard (2) StdElectronic
and Add new Occupancy
Sensor
$10,800 $955
20 Office 6 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$320 $23
21 Corridor FLUOR (2) T8 F32T8 32W U-
Tube Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor and Improve
Manual Switching
$110 $7
22 MPR Stage 8 INCAN A Lamp, Std 150W
with Manual Switching
Replace with 8 LED 35W
Module StdElectronic
$800 $51
23 Exterior Building 7 MH 100 Watt Magnetic with
Manual Switching
Replace with 7 LED 50W
Module StdElectronic
$2,100 $118
24 Class FLUOR (3) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Replace with FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$150 $8
25 Exterior Building 5 MH 70 Watt Magnetic with
Manual Switching
Replace with 5 LED 35W
Module StdElectronic
$1,500 $65
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
26 Restroom Small 7 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$1,050 $40
27 Exterior Site 6 MH 400 Watt Magnetic with
Manual Switching
Replace with 6 LED 150W
Module StdElectronic
$12,000 $429
28 Class 7 FLUOR (3) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching, Multi-Level Switch
Replace with 7 FLUOR (2)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
$1,050 $33
29 Class 65 FLUOR (3) T8 4' F32T8
32W Standard (2) Program
StdElectronic with Manual
Switching, Occupancy Sensor,
Multi-Level Switch
Replace with 65 FLUOR
(2) T8 4' F32T8 32W
Standard (2) Program
StdElectronic
$9,750 $311
30 Class Practice 3 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$450 $12
31 Class FLUOR (3) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$150 $4
32 Corridor MH 50 Watt with Manual
Switching
Replace with LED 17W
Module StdElectronic and
Improve Manual Switching
$400 $8
33 Storage FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$150 $2
34 Utility 2 MH 50 Watt with Manual
Switching
Replace with 2 LED 20W
Module StdElectronic
$350 $4
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix E
Energy Conservation Measures
Glacier View Generator Storage Shed
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
The following tables consist of raw output data from the AkWarm Commercial program used to model
energy costs and calculate energy savings and financial ratios. These tables represent all of the energy
conservation measures calculated and considered by the energy audit team. However, ECMs included in
the Executive Summary and Section VIII are recommended by the energy audit team due to their viable
financial ratios (SIR>1) or due to their value added.
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback Thermostat:
Generator Storage
Shed
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Generator Storage Shed
space.
$247 $1 2899.32 0
2 Air Tightening Perform air sealing to
reduce air leakage by 20%.
$38 $300 1.07 7.8
3 Ceiling w/ Attic:
Ceiling
Add R-21 fiberglass batts
to attic with Standard
Truss.
$14 $782 0.34 56.8
4 Lighting: Generator
Shed Lighting
Replace with 2 FLUOR
CFL, Spiral 23 W
$0 $60 0.01 1125.4
5 Lighting: Generator
Shed Lighting
Add new Occupancy
Sensor
$0 $150 0.00 26859
TOTAL $299 $1,293 2.7 4.3
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
2. Building Envelope
Insulation
Rank Location Existing Type/R-Value Recommendation Type/R-
Value
Installed
Cost
Annual
Energy
Savings
3 Ceiling w/ Attic:
Ceiling
Framing Type: Standard
Framing Spacing: 16 inches
Insulated Sheathing: None
Bottom Insulation Layer: R-25
Batt:FG or RW, 8 inches
Top Insulation Layer: None
Modeled R-Value: 26.3
Add R-21 fiberglass batts to
attic with Standard Truss.
$782 $14
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
2 Air Tightness estimated as: 1.30
cfm/ft2 of above-grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 20%.
$300 $38
2. Mechanical Equipment
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 Generator Storage
Shed
Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Generator Storage Shed
space.
$1 $247
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
4 Generator Shed
Lighting
2 INCAN A Lamp, Std 75W
with Manual Switching
Replace with 2 FLUOR
CFL, Spiral 23 W
$60 $0
5 Generator Shed
Lighting
2 INCAN A Lamp, Std 75W
with Manual Switching
Add new Occupancy
Sensor
$150 $0
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix F
Site Survey Photos
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
1. Main Entrance, West face 2. School Building, South face
3. School Building, East face 4. School Building, North face
5. Generator Storage Shed 6. Typical Entryway Doors
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
7. Shop, Insulated Structural Beams along
Exterior Northeast Corner 8. Boilers B-1 and B-2 in Boiler Room
9. Heating water pumps, CP-1, CP-1A, CP-2
and CP-2A 10. Heating Water 3-way valve control
11. Air Compressor for Pneumatic Supply in
Boiler Room 12. Pneumatic Actuator on AHU-2 in Fan Room
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
13. Variable Frequency Drive on AHU-1 in Fan
Room 14. Exhaust Fan, EF-1, in Fan Room
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Appendix G
Thermographic Photos
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
Coffman Engineers made miscellaneous thermographic images of Glacier View K-12 School using a
FLIR T300 Infrared Camera. This is not a thermographic study, rather photographs to illustrate easy-to-
identify heat losses.
1. Optical Image, Main Entrance. Thermal Image is shown below.
2. Thermographic Image, Main Entrance. Temperatures indicated by color scale on right. Yellow
indicates heat leakage. The outside temperature was about -7°F.
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
3. Optical Image, West Windows. Thermal
Image to the right is indicated by the white
border.
4. Thermographic Image, West Windows. Heat
loss through windows is expected.
5. Optical Image, Southwest Deck. Thermal
Image is shown on the right.
6. Thermographic Image, Southwest Deck. No
unusual heat loss was observed. Solar heating
is observed on column and roof.
7. Optical Image, Technology Room North
Wall. Thermal Image to the right is shown
on the right.
8. Thermographic Image, Technology Room
North Wall. Heat loss occurring around
doors seals indicates a need for improved
weatherization. Heat observed along roof
edge is a result of heat trace.
Glacier View K-12 School Final Energy Audit Report
Coffman Engineers, Inc. 6/12/2012 AkWarm No. CIRI-JVM-CAEC-01
9. Optical Image, Boiler Room Door. Thermal
Image is shown on the right.
10. Thermographic Image, Boiler Room Door.
Heat loss occurring through wall seams is an
evidence of failed insulation. Heat loss along
the door seal indicates a need for improved
weatherization.
11. Optical Image, Generator Storage Shed.
Thermal Image is shown to the right.
12. Thermographic Image, Generator Storage
Shed. High surface temperatures are due to
solar heating.
End of Report