HomeMy WebLinkAboutASRC-PHO-RSA PHO Public works USDW 2012-EERichard S. Armstrong, PE, LLC
Comprehensive, Investment Grade Energy Audit
Point Hope USDW Building (aka Public Works or DMS Building)
Project
The North Slope Borough
Department of Public Works
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C
Co
Richard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive, Investment Grade Energy Audit
of
USDW Building (aka Public Works or DMS Building)
Project # ASRC-PHO-RSA-01
Prepared for:
The North Slope Borough
Department of Public Works
April 6, 2012
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C-6
Anchorage, Ak 99501
Co-Preparer: WHPacific, Inc.
1728 Ahkovak
Barrow, AK 99723
Point Hope Old USDW Building
Point Hope Old USDW Building Comprehensive Energy Audit
3
REPORT DISCLAIMERS
The information contained in this report, including any attachments, is
intended solely for use by the building owner and the AHFC. No others are
authorized to disclose, copy, distribute or retain this report, in whole or
part, without written authorization from Richard S. Armstrong, PE, LLC,
2321 Merrill Field Drive, C-6, Anchorage, Ak 99501. Additionally, this
report contains recommendations that, in the opinion of the auditor, will
cause the owner to realize energy savings over time. All recommendations
must be designed by a registered engineer, licensed in the State of
Alaska, in the appropriate discipline. Lighting recommendations should all
be first reviewed by running a lighting analysis to assure that the
recommended lighting upgrades will comply with State of Alaska Statue as
well as IES recommendations.
Payback periods may well vary from those forecast due to the uncertainty
of the final installed design, configuration, equipment selected, and
installation costs of recommended Energy Efficiency Measures (EEMs), or
the operating schedules and maintenance provided by the owner.
Furthermore, EEMs are typically interactive, so implementation of one
EEM may impact the cost savings from another EEM. Neither the auditor,
Richard S. Armstrong, PE, LLC, AHFC, or others involved in preparation of
this report will accept liability for financial loss due to EEMs that fail to
meet the forecasted payback periods.
This audit meets the criteria of an Investment Grade Audit (IGA) per the
Association of Energy Engineers definition, and is valid for one year. The
life of the IGA may be extended on a case-by-case basis, at the discretion
of the AHFC.
IGSs are the property of the State, and may be incorporated into AkWarm-
C, the Alaska Energy Data Inventory (ARIS), or other state and/or public
information system
Point Hope Old USDW Building Comprehensive Energy Audit
4
Investment Grade Energy Audit
Point Hope Old USDW Building
1. Executive Summary: The Point Hope Old USDW building, now
known as Public Works or DMS, was constructed in 1983 and has
seen no major remodels since then.
Table 1
2010 2011
Utility Consumption Cost/Year Consumption Cost/Year
Electricity-kWh 122,840 $29,482 120,580 $28,939
Fuel Oil - Gallons Not available 21,999 $139,694
Total Energy Costs $29,482* $168,633
*NOTE: assuming similar fuel oil use for 2010, the utility cost for
2010 was $169,176
A benchmark measure of energy use relative to other similar function
buildings in the area is the Energy Use Index (EUI), which takes the
total annual energy used by the facility divided by the square footage
area of the building, for a value expressed in terms of kBTU/SF. This
number can then be compared to other buildings to see if it is about
average, higher or lower than similar buildings in the area. Likewise,
the Energy Cost Index (ECI) is the cost of all energy used by the
building expressed in $/SF of building area. The comparative values
for the subject building are listed in Table 2 below:
Table 2
USDW Building PHO Average Warm Storage
Energy Use Index (EUI)
kBTU/SF Avg 2009, 2010
32 41 34
Energy Cost Index (ECI)
Average 2009, 2010
$2.79 $3.54 $3.10
Various Energy Efficiency Measures (EEMs) have been analyzed for
this building to determine if they would be applicable for energy
savings with reasonably good payback periods. Those EEMs that
have a payback period or those that are recommended for code
compliance, life cycle replacement, or other reasons are also
included. Also, where a lighting upgrade is recommended from T-12
lamps with magnetic ballasts to T-8 lamps with electronic ballasts,
then the entire facility should be re-lamped and re-ballasted to
Point Hope Old USDW Building Comprehensive Energy Audit
5
maintain a standard lighting parts inventory, regardless of the
payback. For example, a storage room that is infrequently used may
not show a very good payback for a lighting upgrade, but
consistency dictates a total upgrade.
Specific EEMs recommended for this facility are summarized below,
and are detailed in the attached AkWarm Energy Audit Report along
with specific payback times, as well as estimated installation costs
and estimated energy savings. Several of the EEMs are not modeled
in the AkWarm-C program because they will require engineering to
determine costs and payback once the technical savings are
estimated. The higher priority items are summarized below:
a. Air Infiltration: In mixed use, vehicle maintenance and
storage facilities such as the subject building, it is typical that
the overhead doors are opened and left open for long periods
of time, even during the winter months. A single overhead door
left open will cause a vehicle bay’s heaters to run at full
capacity in an attempt to maintain temperature. All this heat is
lost to the outside as long as the door is open. This is an
effective loss of half a gallon of fuel oil per hour per unit heater
or H&V (Heating and Ventilation) unit. It is recommended to
add automatic door closers with integral personnel safety
sensors, set to close the overhead door 1-3 minutes after
opening. This increased frequency of door opening and
closings will increase energy usage by the door openers, and
this offset is considered in the AkWarm-C Report in Appendix
B.
b. Thermostat Setbacks: With a few exceptions, all rooms in this
building have thermostats which control room and/or zone
temperatures. It is recommended that setback thermostats be
installed and programmed to reduce room temperatures to 55
°F during unoccupied periods.
c. Fluorescent Lighting Upgrades: The offices and other low
spaces have a mixture of T12 and T8 lamps with mostly
magnetic ballasts. The AkWarm-C program models these
lamps and shows the payback period if all lamps are changed
to T8s with electronic programmable ballasts. It is
Point Hope Old USDW Building Comprehensive Energy Audit
6
recommended that all T12 lamps be retrofitted to T8 with
electronic ballasts for lamp and ballast standardization
regardless of the payback period. Typical savings in power
consumption varies 10-30% with this upgrade.
d. Lighting Control Upgrades: During the audit, almost all of the
building’s lights were found to be left on with nobody in the
space. Occupant controls sense the presence of occupants,
turn the lights on at a pre-determined level, and then turn the
lights off after a programmed time period of no occupancy. It is
recommended that motion-sensing occupancy sensors be
installed in the existing duplex switch boxes for all offices,
corridors, and stairwells, and that ceiling-mounted dual-
technology sensors be installed where obstacles may interfere
with line-of-sight sensors, such as in lavatories, corridors,
vehicle bays, and storage areas. The second technology in
these sensors activates lighting based on sound. These
controls can reduce total kWh consumption for the lighting in
the order of 30-90%, depending on the amount of time the
lights are manually left on.
e. High-Bay Lighting: The vehicle bays are illuminated with 250-
Watt HPS fixtures, which take several minutes to restrike. This
means they are typically left on at all times, which wastes a
large amount of electrical energy. It is recommended that these
HPS lamps be replaced with 5-tube HO (High-Output) T5
fixtures with fixture-mounted, dual-technology occupancy
sensors. There is a negligible energy savings resulting directly
from the fixture/lamp change, but because T5 lamps have no
warm-up time, they allow the use of occupancy sensors which
can result in up to 80-90% reduction in on-time and energy
use. Multiple “night lights” could also be wired to be on
continuously if desired.
f. Exterior Lighting Upgrades: The exterior high pressure
sodium lights operate during periods of darkness, which is
about half of the year. It is estimated that the use of LED
exterior lights can reduce the power consumption by 60% and
extend bulb replacement frequency to 5-10 years, yielding an
even better payback by reducing maintenance costs.
Point Hope Old USDW Building Comprehensive Energy Audit
7
g. Headbolt Heater Controls: Studies have shown that leaving a
vehicle plugged in for more than four hours is an unnecessary
waste of energy regardless of outside temperature, as the
engine’s temperature typically stabilizes after that. Leaving
block, oil pan, and battery heaters energized when not needed
may waste up to $300 per year per car in electricity costs. To
reduce this cost, microprocessor-controlled duplex receptacles
have been developed that cycle power to the heaters based on
outside temperature. It is recommended that the existing
headbolt heater receptacles be replaced with these
temperature-controlled receptacles at a cost of $200 each.
h. Refrigerator: Newer Energy Star refrigerators use about 411
watts, compared to 1990 versions that used 1,044 watts. It is
recommended that, at EOL (End Of Life), the existing
refrigerators be replaced with an Energy Star equivalent unit.
The cost difference is about $75 per unit, which will be realized
in energy savings in less than two years.
In addition to EEMs, various Energy Conservation Measures (ECMs)
are recommended since they are policies or procedures that are
followed by management and employees that require no capital
outlay. Examples of recommended ECMs for this facility include:
• Turn off lights when leaving a room that is not controlled by an
occupancy sensor that automatically turns off lights.
• Turn off computers, monitors, printers, faxes, coffee makers,
etc when leaving the office for the day.
• Keep overhead doors closed except when they are required to
be open for movement of vehicles.
The 21 priority recommendations in the detailed report estimate to save
$38,197/year, with an installed cost of $55,687. This does not include
design or CA services, but overall it does indicate a cost effective
energy savings program.
Point Hope Old USDW Building Comprehensive Energy Audit
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2. Audit and Analysis Background:
a. Program Description: This audit included services to identify,
develop, and evaluate energy efficiency measures at the
subject building. The scope of this project included evaluating
the building shell, lighting, other electrical systems, and
heating, ventilating, and air conditioning (HVAC) equipment.
Measures were selected such that an overall simple payback
period of 8 years or less could be achieved.
b. Audit Description and Methodology: Preliminary audit
information was gathered in preparation for the site survey,
including benchmark utility consumption data, floor and lighting
plans, and equipment schedules where available. A site visit is
then performed to inventory and evaluate the actual building
condition, including:
i. Building envelope (roof, windows, etc)
ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
v. Plumbing systems
c. Method of Analysis: The information gathered prior to the site
visit and at the site visit is entered into AkWarm-C, an energy
modeling developed for Alaska Housing Finance Corporation
(AHFC) specifically to identify forecasted energy consumption
which can be compared to actual energy consumption.
AkWarm-C also has some pre-programmed EEM retrofit
options that can be analyzed with energy savings forecasted
based on occupancy schedules, utility rates, building
construction type, building function, existing conditions, and
climatic data that is already uploaded to the program based on
the zip code of the building. When new equipment is proposed,
energy consumption is calculated based on manufacturer’s
cataloged information.
Cost savings are calculated based on the historical energy
costs for the building. Installation costs include labor and
equipment to estimate the full up-front investment required to
implement a change, but design and construction management
Point Hope Old USDW Building Comprehensive Energy Audit
9
costs are excluded. Costs are derived from Means Cost Data,
industry publications, experience of the auditor, local
contractors and equipment suppliers. Maintenance savings are
calculated were applicable and are added to the energy
savings for each EEM.
The cost and savings are applied and a simple payback and
simple return on investment (ROI) is calculated. The simple
payback is based on the number of years that it takes for the
savings to pay back the net installation cost (Net Installation
divided by Net Savings.)
A simple life-time calculation is shown for each EEM. The life-
time for each EEM is estimated based on the typical life of the
equipment being replaced or altered. The energy savings is
extrapolated throughout the life-time of the EEM. The total
energy savings is calculated as the total life-time multiplied by
the yearly savings.
d. Limitations of the Study: All results are dependent on the
quality of input data provided, and can only act as an
approximation. In some instances, several methods may
achieve the identified savings. This report is not intended as a
final design document. A design professional, licensed to
practice in Alaska and in the appropriate discipline, who is
following the recommendations, shall accept full responsibility
and liability for the results. Budgetary estimates for engineering
and design of these projects in not included in the cost
estimate for each measure, but these costs generally run
around 15% of the cost of the work.
3. Acknowledgements: We wish to acknowledge the help of
numerous individuals who have contributed information that was
used to prepare this report, including:
a. Alaska Housing Finance Corporation (Grantor): AHFC
provided the grant funds, contracting agreements, guidelines,
and technical direction for providing the audits. AHFC reviewed
and approved the final short list of buildings to be audited
Point Hope Old USDW Building Comprehensive Energy Audit
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based on the recommendation of the Technical Service
Provider (TSP).
b. North Slope Borough (Owner): The NSB provided building
sizing information, two years energy billing data, building
schedules and functions, as well as building age. Price Brower,
manager of the facility, was very helpful in offering any
assistance requested during the audit.
c. Nortech Engineering (Benchmark TSP): Nortech
Engineering compiled the data received from the NSB and
entered that data into the statewide building database, called
the Alaska Retrofit Information System (ARIS).
d. Richard S. Armstrong, PE, LLC (Audit TSP): This is the TSP
who was awarded the projects in the Arctic Slope Regional
Corporation, Bering Straits area, and the Nana area. The firm
gathered all relevant benchmark information provided to them
by Nortech, cataloged which buildings would have the greatest
potential payback, and prioritized buildings to be audited based
on numerous factors, including the Energy Use Index (EUI),
the Energy Cost Index (ECI), the age of the building, the size
of the building, the location of the building, the function of the
building, and the availability of plans for the building. They also
trained their selected sub-contracted auditors, assigned
auditors to the selected buildings, and performed quality
control reviews of the resulting audits. They prepared a listing
of potential EEMs that each auditor must consider, as well as
the potential EEMs that the individual auditor may notice in the
course of his audit. Richard S. Armstrong, PE, LLC also
performed some of the audits to assure current knowledge of
existing conditions.
e. WHPacific, Inc (Audit Preparer): This firm specializes in
mechanical, electrical, and civil design, and has a mechanical
EIT who is a Certified Energy Auditor in Training. This CEIT
has received additional training from Richard S. Armstrong,
PE, LLC to acquire further specific information regarding audit
requirements and potential EEM applications. WHPacific
Point Hope Old USDW Building Comprehensive Energy Audit
11
prepared this audit and submitted it for review by Richard S.
Armstrong, PE, LLC.
4. Building Description and Function: The subject structure is called
the Point Hope Public Works Building, and was formerly known as
the Point Hope USDW building. It was constructed in 1983 and has
seen no major remodels since then. The building is a mixture of one
story high-bay spaces and two story office/storage areas. This
building serves as a shop and storage space for the North Slope
Borough School District, the NSB Roads division, the NSB power
and Light Division, and the NSB Water and Sewer Division. It also
provides office space for the Point Hope public works office.
a. Heating System: The building heating system consists of two
Burnham 1,552 MBH cast iron boilers. The boilers provide heat
to the make-up air system, offices, shops, and storage areas.
The boilers were installed after 2001. Hot glycol is circulated in
three loops using six pumps. Pumps 1, 3, and 5 are Grundfos
UPS50-160F circ pumps, and the three old B&G pumps (CP-2,
4, and 6) are inoperative or missing. Because of this, there is
no redundancy in the circulation system, and if one of the
pumps fails, a portion of the building or heat trace will lose
heat. These pumps should be replaced with the new models as
soon as possible to avoid such failure.
b. Ventilation System: There are 10 H&V (Heating and
Ventilation) units and 10 exhaust fans in this building. All
together, the exhaust fans can draw over 7500 cfm of
conditioned air from the building. Careful attention should be
paid to the control system governing these fans. Since there
are typically only 3 or 4 occupants in this building, very little air
exchanges are needed in a building this size, and the
ventilation system can potentially waste a great deal of heat.
c. Plumbing System: Toilets with lavs, showers, and clothes
washing facilities are provided for the workers, in addition to a
break sink. Each bay is equipped with a drain system to a
sump which pumps the graywater into the sewage system.
Point Hope Old USDW Building Comprehensive Energy Audit
12
d. Domestic Hot Water: Hot water is generated using a sidearm
water heater that draws heat from the boilers. A 4.5 kW electric
water heater is also installed, but this was not energized during
the audit, and it is unknown how much it is used.
e. Lighting: Lighting throughout the building is comprised of a
mixture of T12 and T8 fixtures with mostly magnetic ballasts in
the offices and low spaces. The hangar area is lit using 250
watt HPS lighting fixtures, and exterior lights are typically 250
watt HPS wall packs.
5. Historic Energy Consumption: Energy consumption is modeled
within the AkWarm-C program. The program only analyzes 12
months of data, so where 24 months of data are available, the data
is averaged and input to AkWarm-C to provide more accuracy. The
energy consumption data is presented and graphed in the attached
AkWarm-C program results.
The average electric consumption for the building is 121,710
kWh/year at an average cost of $29,210/year. The average #2 fuel
oil consumption was 21,999/year, at an average annual cost of
$139,693/year.
6. Energy Efficiency Measures considered or recommended: The
building was examined for application of a multitude of potential
EEMs. Those EEMs that appear to have an application for the
subject building are further analyzed for estimated payback periods,
either within the AkWarm-C program or separately within this report.
General EEM categories were discussed in this report’s executive
summary. Each specific EEM is detailed in the attached AkWarm-C
report that comprises Appendix B.
The accuracy of the cost estimates and paybacks varies
significantly due to a multitude of conditions, but is estimated to be
approximately +/- 25%. Assumptions made regarding energy costs
and the life of the EEM, noting that post-construction measurement
and verification are based on energy savings, not energy cost
savings. Many of the selected EEMs are analyzed within the
Point Hope Old USDW Building Comprehensive Energy Audit
13
AkWarm-C program using the schedules and estimated costs input
into the model.
7. Interactive Effects of Projects: The AkWarm-C program calculates
savings assuming that all recommended EEM are implemented. If
some EEMs are not implemented, savings for the remaining EEMs
will be affected, in some cases positively, and in others, negatively.
For example, if the fan motors are not replaced with premium
efficiency motors, then the savings for the project to install variable
speed drives (VFDs) on the fans will be increased.
In general, all projects were evaluated sequentially so that energy
savings associated with one EEM would not be attributed to another
EEM as well. For example, the night setback EEM was analyzed
using the fan and heating load profile that will be achieved after
installation of the VFD project is completed. By modeling the
recommended projects sequentially, the analysis accounts for
interactive effects between the EEMs and does not “double count”
savings.
Interior lighting, plug loads, facility equipment, and occupants
generate heat within the building. When the building is in cooling
mode, these contribute to the overall cooling demands of the
building; therefore lighting efficiency improvements will reduce
cooling requirements on air conditioned buildings. Conversely,
lighting efficiency improvements are anticipated to increase heating
requirements slightly. Heating penalties are included in the lighting
project analysis that is performed by AkWarm-C.
8. Loan Program: The Alaska Housing Finance Corporation (AHFC)
Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State
of Alaska program enacted by the Alaska Sustainable Energy Act
(senate Bill 220, A.S. 18.56.855, “Energy Efficiency Revolving Loan
Fund). The AEERLF will provide loans for energy efficiency retrofits
to public facilities via the Retrofit Energy Assessment for Loan
System (REAL). As defined in 15 AAC 155.605, the program may
finance energy efficiency improvements to buildings owned by:
a. Regional educational attendance areas;
Point Hope Old USDW Building Comprehensive Energy Audit
14
b. Municipal governments, including political subdivisions of
municipal governments;
c. The University of Alaska;
d. Political subdivisions of the State of Alaska, or
e. The State of Alaska
Native corporations, tribal entities, and subsidiaries of the federal
government are not eligible for loans under this program.
Appendix A: Photos
The Public Works/Old USDW Building as seen from the southeast.
Looking from the southwest.
Appendix A: Photos
In the 2nd floor boiler room. The burner on boiler #2 was being repaired during the audit.
Glycol circ pumps #1-6. Each loop has only one operable pump.
Appendix A: Photos
New building compressor waiting to be installed in the 2nd floor boiler room.
Backup genset in the 1st floor mechanical room. Tested weekly.
Appendix A: Photos
Most thermostat controls are inoperable and have been hard wired for full heating capacity.
Inoperable used oil burner. This is a good source of “free” heat if it is repaired.
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 1
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 4/9/2012 4:29 AM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: USDW Building (Public Works Building) Auditor Company: Richard S. Armstrong, PE, LLC
Address: 901 Ippiq St Auditor Name: Richard S. Armstrong, David Robbins
City: Point Hope Auditor Address: 2321 Merrill Field Drive C-6
Anchorage, Ak 99501 Client Name: John Long
Client Address: PO Box 129
901 Ippiq St
Point Hope, AK 99766
Atqasuk, AK 99791
Auditor Phone: (907) 229-0331
Auditor FAX:
Client Phone: (907) 368-2613 Auditor Comment:
Client FAX:
Design Data
Building Area: 13,850 square feet Design Heating Load: Design Loss at Space: 1,993,807
Btu/hour
with Distribution Losses: 2,190,996 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 3,339,933 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 8 people Design Indoor Temperature: 70 deg F (building average)
Actual City: Point Hope Design Outdoor Temperature: -39.7 deg F
Weather/Fuel City: Point Hope Heating Degree Days: 16,501 deg F-days
Utility Information
Electric Utility: North Slope Borough Utilities -
Commercial - Lg
Natural Gas Provider: None
Average Annual Cost/kWh: $0.296/kWh Average Annual Cost/ccf: $0.000/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting Refrige
ration
Other
Electric
al
Cooking Clothes
Drying
Ventilatio
n Fans
Service
Fees Total Cost
Existing
Building
$154,25
0
$0 $923 $14,730 $0 $5,073 $0 $245 $1,314 $180 $176,715
With
Proposed
Retrofits
$125,78
1
$0 $2,800 $4,103 $0 $4,231 $0 $240 $1,283 $180 $138,617
SAVINGS $28,469 $0 -$1,877 $10,628 $0 $842 $0 $6 $31 $0 $38,098
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 2
$0
$50,000
$100,000
$150,000
$200,000
Existing Retrofit
Service Fees
Ventilation and Fans
Space Heating
Other Electrical
Lighting
Domestic Hot Water
Clothes Drying
Annual Energy Costs by End Use
$0
$50,000
$100,000
$150,000
$200,000
Existing Retrofit
#2 Oil Electricity
Annual Energy Costs by Fuel
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 3
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback Thermostat:
Equipment bays
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Equipment bays space.
$13,868 $600 313.79 0
2 Setback Thermostat:
Storage and
warehouse
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Storage and
warehouse space.
$12,291 $1,200 139.05 0.1
3 Setback Thermostat:
Overnight residences
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Overnight residences
space.
$2,516 $600 56.93 0.2
4 Setback Thermostat:
Offices, corridors,
stairwells
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Offices, corridors,
stairwells space.
$3,363 $1,200 38.05 0.4
5 Other Electrical:
Pump 10 - sewage
ejector
Remove Manual Switching
and Add new Clock Timer
or Other Scheduling
Control
$162 $100 9.24 0.6
6 Lighting: T12-1 lamp
interior lighting -
bathrooms
Remove Manual Switching
and Add new Occupancy
Sensor
$240 $150 9.16 0.6
7 Other Electrical:
Refrigerators
Replace with standard
sized refrigerator
$38 $75 2.87 2
8 Lighting: Exterior
lighting - 250W HPS
door lights
Replace with 5 LED 100W
Module StdElectronic
$784 $3,000 2.45 3.8
9 Other Electrical:
Head bolt heaters - 4
of 7 typically in use
Remove Manual Switching
and Add new Other
Controls
$531 $1,400 2.35 2.6
10 Lighting: T12-4 lamp
Interior lighting; add
OS
Replace with 17 FLUOR (4)
T8 4' F32T8 28W Energy-
Saver Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor, Multi-
Level Switch
$947 $2,700 1.99 2.9
11 Lighting: Exterior
lighting - 150W HPS
wall packs
Replace with LED 34W
Module StdElectronic
$124 $800 1.90 6.4
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
12 Lighting: T12-2 lamp
Interior lighting -
vestibules, offices,
storage areas, etc;
add OS
Replace with 126 FLUOR
(2) T8 4' F32T8 28W
Energy-Saver Instant
StdElectronic and Remove
Manual Switching and Add
new Occupancy Sensor,
Multi-Level Switch
$2,108 $18,950 1.55 9
13 Lighting: Interior
lighting -
incandescent bulbs
Replace with FLUOR CFL, A
Lamp 20W
$2 $10 1.36 4.2
14 Lighting: T12-1 lamp
Interior lighting -
vestibules, offices,
storage areas, etc;
add OS
Replace with 31 FLUOR T8
4' F32T8 28W Energy-
Saver Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor, Multi-
Level Switch
$188 $8,550 1.14 45.5
15 Lighting: Interior
lighting - high bay
Public Works bay -
250W HPS fixtures
Replace with 13 FLUOR (4)
T5 45.2" F54W/T5 HO
Energy-Saver HighLight
StdElectronic and Remove
Manual Switching and Add
new Occupancy Sensor
$611 $7,501 1.04 12.3
16 Lighting: T8-4 lamp
Interior lighting; add
OS
Replace with 2 FLUOR (4)
T8 4' F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$62 $450 0.77 7.3
17 Lighting: Exterior
lighting - 250W HPS
wall packs
Replace with 5 LED 48W
Module StdElectronic
$268 $6,000 0.59 22.4
18 Lighting: T12-1 lamp
interior lighting -
bathrooms
Replace with 2 FLUOR T8
4' F32T8 32W Standard
Instant StdElectronic
$16 $200 0.44 12.7
19 Lighting: T8-1 lamp
Interior lighting; add
OS
Replace with FLUOR T8 4'
F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor, Multi-Level Switch
$12 $450 0.14 39
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 5
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
20 Lighting: T8-2 lamp
Interior lighting; add
OS
Replace with FLUOR (2) T8
4' F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$17 $1,750 0.05 102.6
21 Other Electrical:
Overhead door
openers
Improve Manual Switching -$50 $1 -282.63 0
TOTAL $38,098 $55,687 9.08 1.5
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R-Value Recommendation Type/R-
Value
Installed
Cost
Annual
Energy
Savings
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 6
1 Equipment bays Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Equipment bays space.
$600 $13,868
2 Storage and
warehouse
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Storage and warehouse
space.
$1,200 $12,291
3 Overnight
residences
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Overnight residences
space.
$600 $2,516
4 Offices, corridors,
stairwells
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the Offices, corridors,
stairwells space.
$1,200 $3,363
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
6 T12-1 lamp interior
lighting -
bathrooms
2 FLUOR T12 6' F72T12/HO
85W Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$150 $240
8 Exterior lighting -
250W HPS door
lights
5 HPS 250 Watt Magnetic with
Manual Switching
Replace with 5 LED 100W
Module StdElectronic
$3,000 $784
10 T12-4 lamp Interior
lighting; add OS
17 FLUOR (4) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 17 FLUOR (4)
T8 4' F32T8 28W Energy-
Saver Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor, Multi-
Level Switch
$2,700 $947
11 Exterior lighting -
150W HPS wall
packs
HPS 150 Watt Magnetic with
Daylight Sensor
Replace with LED 34W
Module StdElectronic
$800 $124
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 7
12 T12-2 lamp Interior
lighting -
vestibules, offices,
storage areas, etc;
add OS
126 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 126 FLUOR (2)
T8 4' F32T8 28W Energy-
Saver Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor, Multi-
Level Switch
$18,950 $2,108
13 Interior lighting -
incandescent bulbs
INCAN A Lamp, Std 60W with
Manual Switching
Replace with FLUOR CFL, A
Lamp 20W
$10 $2
14 T12-1 lamp Interior
lighting -
vestibules, offices,
storage areas, etc;
add OS
31 FLUOR T12 4' F40T12 40W
Standard Magnetic with
Manual Switching
Replace with 31 FLUOR T8
4' F32T8 28W Energy-Saver
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor, Multi-Level Switch
$8,550 $188
15 Interior lighting -
high bay Public
Works bay - 250W
HPS fixtures
13 HPS 250 Watt Magnetic with
Manual Switching
Replace with 13 FLUOR (4)
T5 45.2" F54W/T5 HO
Energy-Saver HighLight
StdElectronic and Remove
Manual Switching and Add
new Occupancy Sensor
$7,501 $611
16 T8-4 lamp Interior
lighting; add OS
2 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Replace with 2 FLUOR (4)
T8 4' F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$450 $62
17 Exterior lighting -
250W HPS wall
packs
5 HPS 100 Watt Magnetic with
Daylight Sensor
Replace with 5 LED 48W
Module StdElectronic
$6,000 $268
18 T12-1 lamp interior
lighting -
bathrooms
2 FLUOR T12 6' F72T12/HO
85W Standard Magnetic with
Manual Switching
Replace with 2 FLUOR T8 4'
F32T8 32W Standard
Instant StdElectronic
$200 $16
19 T8-1 lamp Interior
lighting; add OS
FLUOR T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Replace with FLUOR T8 4'
F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor, Multi-Level Switch
$450 $12
20 T8-2 lamp Interior
lighting; add OS
FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Replace with FLUOR (2) T8
4' F32T8 32W Standard
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$1,750 $17
Refrigeration
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 8
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
5 Pump 10 - sewage
ejector
Dayton .5/120/1 motor with
Manual Switching
Remove Manual Switching
and Add new Clock Timer
or Other Scheduling
Control
$100 $162
7 Refrigerators standard sized refrigerator with
Manual Switching
Replace with standard
sized refrigerator
$75 $38
9 Head bolt heaters -
4 of 7 typically in
use
4 Duplex receptacle head bolt
heaters with Manual Switching
Remove Manual Switching
and Add new Other
Controls
$1,400 $531
21 Overhead door
openers
7 PowerMaster openers, 3/4
HP, 115V single phase motors
with Manual Switching
Improve Manual Switching $1 -$50
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
Fire tube for boiler #2 (burner down for maintenance)
New air compressor in 2nd floor mech room. Awaiting installation.
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 9
Generator room on first floor.
Fire sprinkler system zone assembly
Cast iron Burnham Boilers #1 and #2
Circ pumps on the three glycol loops. Three have been replaced with
new grundfos pumps. The other three are inoperable.
View of the building from the east side (main entrance).
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 10
View of the building from the northeast corner (school district bays)
View of the building from the northwest corner. School Dist bays and
lineman bay visible.
view of the building from the southeast corner. lineman bay and DMS
bays visible.
thermister reading access panel.
hardwired temp control.
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 11
programmable building controls not in use/inoperable
H&V unit #2
Black Gold used oil burner inoperable.
South-facing bay door. Showing air infiltration at base and sides.
Close-up on bay door showing infiltration of -15F air.
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
USDW Building (Public Works Building)
Page 12
H&V unit #1 showing heating of incoming air at coil after mixing.
IR view of glycol pumps showing inoperative pumps.
------------------------------------------
AkWarmCalc Ver 2.1.4.2, Energy Lib 3/1/2012
Appendix C: Equipment Schedules - Mechanical
Appendix C: Equipment Schedules - Mechanical
Appendix D: Building Plan
Appendix E: Lighting Plan
Appendix E: Lighting Plan
Appendix F: Mechanical Schematics
Appendix F: Mechanical Schematics
Appendix F: Mechanical Schematics