HomeMy WebLinkAboutASRC-BRW-RSA Barrow Municipal Bus Barn 2012-EE1
Richard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
Barrow Municipal Bus Barn
1685 Okpik Street, Barrow, Alaska
Project # ASRC-BRW-RSA-04B
Prepared for:
The North Slope Borough
School District
August 2, 2011
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C-6
Anchorage, AK 99501
and
Energy Audits of Alaska
P.O. Box 220215
Anchorage, AK 98522
2
TABLE OF CONTENTS
1. Executive Summary 4
2. Audit and Analysis Background 7
3. Acknowledgements 8
4. Building Description & Function 9
5. Historic Energy Consumption 10
6. Interactive Effects of Projects 11
7. Loan Program 11
Appendix A: Photos 12
Appendix B: AkWarm-C Report 14
Appendix C: Equipment Schedules 19
Appendix D: Building Plan 23
Appendix E: Lighting Plan 26
Appendix F: Mechanical Schematic 30
Performed by: __________________________ __________
Jeff Fondy, CEA #1625 Date
Reviewed by: __________________________ __________
Richard Armstrong, PE, CEM Date
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 analyzed through a thorough lighting analysis to assure that the
recommended lighting upgrades will comply with State of Alaska Statue as well as
IES recommendations.
Payback periods may 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 any other party
involved in preparation of this report accepts 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.
IGA’s 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.
4
1. Executive Summary
This Comprehensive Energy Audit is performed in connection with AHFC’s
Retrofit Energy Assessment for Loans (REAL) program.
Subject Building:
Barrow School District Bus Barn and Shops
1683 Okpik
Barrow, AK 99723
Building Owner: North Slope Borough School District (NSBSD)
School District Contacts:
Mark McCumber, Assistant Director
Linda Janousek, Transportation manager
The site visit to subject building occurred on July 20th.
The subject building was originally constructed in 1995. The facility contains
vehicle storage and maintenance bays, as well as offices, storage room and break
room. The 2009 and 2010 annual utility energy consumption reported by BUECI
and collected as benchmark data by Nortec Engineering is displayed in Table 1
below:
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 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 1
2009 2010
Consumption Cost Consumption Cost
Electricity ‐ kWh 86,480 $ 10,129 82,489 $ 9,837
Natural Gas ‐ CCF 48,285 $ 15,213 46,792 $ 12,417
Total $ 25,342 $ 22,254
5
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. EEMs are recommended for reasons including: 1.) they have a
payback period of less than 8 years, 2.) for code compliance, 3.) life cycle
replacement or 4.) reasons pertaining to operations and maintenance. For
example, 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 maintain a standard lighting parts
inventory, regardless of the payback. An individual storage room that is
infrequently used may not show a very good payback for a lighting upgrade, but
consistency and ease of maintenance dictates a total upgrade.
Specific EEMs recommended for this facility are detailed in the attached AkWarm
Energy Audit Report. Each EEM includes payback times, estimated installation
costs and estimated energy savings.
The following list summarizes the cost and savings of the higher priority EEM’s
included in this audit:
Lighting Upgrades: In general, this facility has T12 lighting in the
offices and vehicle bays, in addition to High Pressure Sodium (HPS)
pendants in vehicle bays – all with magnetic ballasts. Replacing the
T12 lamps with high efficiency T8 lamps and magnetic ballasts saves
20-40% in power consumption. Replacing the HPS warehouse lights
with T5 High Output high bay lighting further reduces power
consumption and maintains a flatter lighting depreciation curve over
time.
Lighting Control Upgrades: Many lights were found to be left on with
nobody in the space. Occupant controls can sense the presence of
workers, and turn the lights on. The controller can then turn the lights
off after a programmed time period of no occupancy. 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.
Table 2
Subject
Building
Barrow
Average School District Bus Barn
Energy Use Index (EUI) ‐ kBTU/SF 557 211 251
Energy Cost Index (ECI) ‐ $/SF $2.63 $1.68 $2.15
6
Exterior Lighting Upgrades: The exterior high pressure sodium lights
operate during periods of darkness, which is about half of a year. It is
estimated that the use of LED exterior lights can reduce the power
consumption by 60%.
Boiler and Unit Heaters: It is recommended that the (1) office furnace
and (8) vehicle bay unit heaters be replaced at their end of life (EOL).
Boiler replacement will be with an equivalent unit, the (8) unit heaters
should be replaced with higher efficiency units. The AKWarm model
considers the incremental difference in cost between (8) equivalent
units and (8) high efficiency units ($1,000 per unit, total cost of
$8000). The total cost to replace the (8) units is estimated at
$32,000. The payback on the incremental difference in cost is 1.4
years.
Setback Thermostats in Office and Vehicle storage bays. The
thermostats were found to be set to 75+ degrees F, 24/7. It is
recommended that lockable setback thermostats be installed and
programmed for occupied temperatures of 72 deg F, and unoccupied
temperatures of 55 deg F. This has an estimated payback of less
than 6 months.
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:
1. Turning lights off when leaving a room that is not controlled by an
occupancy sensor.
2. Keeping roll-up doors closed as much as possible. All man-doors,
roll-up doors and windows should be properly maintained and
adjusted to close and function properly.
3. Turn off computers, printers, faxes, etc. when leaving the office.
The 6 recommendations in the detailed report are estimated to save $9,254/year,
with an installed, replacement cost of $52,629; this is a payback of 5.7 years.
These figures do not include design or CA services, but overall they indicate a cost
effective energy savings program.
7
2. Audit and Analysis Background
a. Program Description: This audit included services to identify, develop, and
evaluate energy efficiency measures for 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.
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 (walls, doors, windows, etc)
ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
v. Plumbing Systems
c. Benchmark Utility Data Validation: Benchmark utility data provided
through AHFC’s initial phase of their REAL program is validated, confirming
that electrical and gas meter numbers on the subject building match the
meters from which the energy consumption and cost data were collected. In
the event that the data is inaccurate, new benchmark utility data is obtained.
d. Method of Analysis:
The information gathered prior to the site visit and at the site visit is entered
into AkWarm-C, an energy modeling software program 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 projected energy savings based on
occupancy schedules, utility rates, building construction type, building
function, existing conditions, and climatic data 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.
Energy cost savings are calculated based on the historical energy costs for
the building. Installation costs include the labor and equipment required to
implement an EEM retrofit, but design and construction management costs
are excluded. Costs are derived from one or more of the following: Means
Cost Data, industry publications, experience of the auditor, local contractors
and equipment suppliers. Haakensen Electric, in Anchorage was consulted
for some of the lighting retrofit costs. Maintenance savings are calculated,
where applicable, and are added to the energy savings for each EEM.
The costs and savings are considered and a simple payback period and
return on investment (ROI) is calculated. The simple payback period is
8
based on the number of years that it takes for the savings to pay back the
net installation cost (Net Installation costs 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.
e. Limitations of the Study: All results are dependent on the quality of input
data provided, and may 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 EEM recommendation, but these
costs can be approximated at 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 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.
c. Benchmark Utility Data Validation: Benchmark utility data provided
through AHFC’s initial phase of their REAL program is validated, confirming
that electrical and gas meter numbers on the subject building match the
meters from which the energy consumption and cost data were collected. In
the event that the data is inaccurate, new benchmark utility data is obtained.
d. 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).
e. 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
9
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.
f. Energy Audits of Alaska (energy auditor): This firm has been selected to
provide audits under this contract in addition to RSA Engineering. The firm
has two mechanical engineers, certified as energy auditors or professional
engineers and has also received additional training from Richard S.
Armstrong, PE, LLC to acquire further specific information regarding audit
requirements and potential EEM applications.
4. Building Description and Function:
The site visit and survey of subject building occurred on July 20th. The building is
one story, and consists of 9038 square feet of space, approximately 5530 of which
is shop/workspace, the remaining 3508 square feet are office space. The building
is used by Building Maintenance division and the Fuels Division.
An inspection of the exterior and interior of the building revealed that the overall
condition of the building is in average to below average considering its age.
Original building plans were not available at the time of the audit, but were
subsequently obtained from NSB Public Works. It appears that the original
building was constructed in 1995 on a passively cooled concrete slab, using 2x6
construction with T-111 plywood exterior siding.
Benchmark utility data provided by AHFC was found to be inaccurate, as building
square footage and meter numbers did not correspond to the actual electric and
gas meters on subject building. Accurate data for the years 2009 and 2010,
corresponding to subject building meter numbers, was obtained from the Barrow
Utilities & Electric Co-op, Inc (BUECI) subsequent to the site visit. Building
dimensions in this report are accurate per drawings obtained from the NSB Public
Works archives, and confirmed by a sampling of exterior building measurements
made on site.
Building details are as follows:
a. Heating System - offices: The office heating system consists of a
Weil McClain CG-5 series boiler rated at 140,000 Btu.hr input. Two
Grundfos UP-43-75F circulators provided glycol to a Gaylord air
handling unit, which provides 1240 CFM of conditioned air to the
10
office space as well as 2 glycol unit heaters in the fuels division
warehouse space.
b. Heating System – shops: Eight (8) gas fired unit heaters are
located in the bus barn storage and vehicle wash bay area. These
are controlled by a standard 24 V thermostat. Personnel on-site
stated they “never used” the make-up air units, MAU-1 and MAU-2,
so they were not considered in this audit.
c. Ventilation System: The shop is ventilated by a make-up are unit
above the shop/vehicle storage area, but no data was available. EAA
was informed that the MAU was no used. Four (4) ceiling mounted
de-stratification fans were mounted to the ceiling with manual
switching on the wall. Each toilet room has an exhaust fan.
d. Plumbing Fixtures: There are two bathrooms, both with a toilet and
sink, the Men’s room includes a urinal.
e. Domestic Hot Water: Hot water is generated using a 50 gallon,
Staten natural gas hot water heater, located in the boiler room
f. Appliances: A 300,000 Btu/hr Landa natural gas pressure washer is
located in the wash bay and is used for washing vehicles.
g. Head Bolt Heaters: There are eleven (11) head bold heaters (“bull
rail”) along the east and west sides of the building.
h. Interior Lighting - Shop: All fluorescent fixtures in this building
have magnetic ballasts except for the men’s washroom, which had
been recently upgraded to T8’s with an electronic ballast. Shop
lighting consists of (25) 400W HPS pendant fixtures, (12) 2-lamp
fixtures with T12 bulbs.
i. Interior Lighting – Office/Warehouse space: Thirty –two (32) 4’,
T12 strip lights fixtures in the warehouse space of the fuel division
and twenty-five (25) recessed 4’ 2 lamp-T12 fixtures in the various
offices and entry ways.
j. Exterior Lighting: Exterior lighting consists of (5) 250W High
Pressure Sodium (HPS) wall pack lights.
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 to provide more accuracy. The
energy consumption data is presented and graphed in the attached AkWarm-C
program results.
Energy consumption was analyzed using two factors: the Energy Cost Index (ECI)
and the Energy Use Index (ECU). The energy cost index takes the average cost of
gas and electrical energy over the surveyed period of time (typically 2 years) and
averages the cost, divided by the square footage of the building. The ECI for this
building is $2.63, the average ECI for all of the benchmarked buildings in Barrow is
$1.68/sq ft
The energy use index (EUI) is the total average electrical and heating energy
consumption per year expressed in thousands of BTUs/SF. The EUI for this
building is very high, 566 and 548 kBTU/sq ft, respectively for 2009 and 2010; the
average EUI for all of the benchmarked buildings in Barrow is 207 kBTU/sq ft.
11
6. 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.
7. 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;
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.
12
Appendix A
Photos
Municipal bus barn in foreground, School district bus barn on far right
Fuel division offices on left, detached fuel division repair facility on
right
13
Appendix A
Office Boiler
300,000 BTU large vehicle pressure washer/steam cleaner
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Barrow Municipal Bus Barn
Page 1
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 8/30/2011 5:11 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Barrow Municipal Bus Barn Auditor Company: Energy Audits of Alaska
Address: PO Box 69 Auditor Name: Jeff Fondy
City: Barrow Auditor Address: PO Box 220215
Anchorage Ak 99522
Client Name: Jim Snow
Client Address: Auditor Phone: (907) 223‐0717
Auditor FAX:
Client Phone: (907) 367‐3156 Auditor Comment:
Client FAX:
Design Data
Building Area: 9,038 square feet Design Heating Load: Design Loss at Space: 151,379 Btu/hour
with Distribution Losses: 172,404 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and 25%
Safety Margin: 262,811 Btu/hour
Note: Additional Capacity should be added for DHW load, if
served.
Typical Occupancy: 20 people Design Indoor Temperature: 68 deg F (building average)
Actual City: Barrow Design Outdoor Temperature: ‐41 deg F
Weather/Fuel City: Barrow Heating Degree Days: 20,370 deg F‐days
Utility Information
Electric Utility: Barrow Utilities & Electric‐elec ‐
Commercial ‐ Lg
Natural Gas Provider: Barrow Utilities & Electric‐gas ‐
Commercial ‐ Lg
Average Annual Cost/kWh: $0.114/kWh Average Annual Cost/ccf: $0.305/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting
Other
Electrica
l
Cooking Clothes
Drying
Ventilation
Fans
Service
Fees
Total
Cost
Existing
Building
$35,158 $0 $448 $8,236 $8,293 $0 $0 $0 $1,222 $53,358
With
Proposed
Retrofits
$29,591 $0 $200 $4,679 $4,146 $0 $0 $0 $1,222 $39,839
SAVINGS $5,567 $0 $248 $3,558 $4,146 $0 $0 $0 $0 $13,519
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Barrow Municipal Bus Barn
Page 2
$0
$20,000
$40,000
$60,000
Existing Retrofit
Service Fees
Space Heating
Other Electrical
Lighting
Domestic Hot Water
Annual Energy Costs by End Use
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Barrow Municipal Bus Barn
Page 3
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Lighting: Warehouse
Lighting
Add new Occupancy
Sensor
$991 $425 20.37 0.4
2 HVAC And DHW Replace Furncae for fuels
division with high efficincy
boiler and indirect hot
water heater to be sized
and design by a certified
and liscensed Mechanical
Engineer. evaluate
supplying tempered water
to NG pressure washer to
reduce fuel usage. Relace
Unit Heaters at end of
useful life with new 93%
efficient models.
$5,815 $8,000 11.68 1.4
3 Other Electrical:
Head Bolt Heaters
Replace with 11 Headbolt
Heaters and Remove
Manual Switching and Add
new Other Controls
$4,146 $2,760 9.60 0.7
4 Lighting: Typical of
all entire office
space, fuel division
(except bathrooms)
Add new Occupancy
Sensor
$486 $400 7.76 0.8
5 Lighting: Exterior
Lighting
Replace with 14 LED 100W
Module StdElectronic
$1,080 $18,900 0.88 17.5
6 Lighting: Vehicle
Wash Bay
Replace with 12 FLUOR (2)
T8 4' F32T8 32W High
Lumen (3100 lum)
Program
HighEfficElectronic and
Add new Occupancy
Sensor
$230 $2,900 0.51 12.6
7 Lighting: Typical of
all entire office
space, fuel division
(except bathrooms)
Replace with 57 FLUOR (2)
T8 4' F32T8 32W Standard
Program
HighEfficElectronic
$605 $11,400 0.34 18.8
8 Lighting: Bathrooms Replace with 6 FLUOR (2)
T8 4' F32T8 32W Standard
Instant StdElectronic and
Add new Occupancy
Sensor
$30 $851 0.31 28.3
9 Lighting: Warehouse
Lighting
Replace with 25 FLUOR (5)
T5 45.2" F54W/T5 HO
Energy‐Saver (2) HighLight
HighEfficElectronic
$136 $25,290 0.05 185.8
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Barrow Municipal Bus Barn
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
TOTAL $13,519 $70,926 2.19 5.2
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
2 Replace Furncae for fuels division with high efficincy boiler and indirect hot water
heater to be sized and design by a certified and liscensed Mechanical Engineer.
evaluate supplying tempered water to NG pressure washer to reduce fuel usage.
Relace Unit Heaters at end of useful life with new 93% efficient models.
$8,000 $5,815
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Barrow Municipal Bus Barn
Page 5
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
1 Warehouse
Lighting
25 HPS 400 Watt Magnetic with
Manual Switching
Add new Occupancy Sensor $425 $991
4 Typical of all entire
office space, fuel
division (except
bathrooms)
57 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Add new Occupancy Sensor $400 $486
5 Exterior Lighting 14 HPS 250 Watt Magnetic with
Daylight Sensor
Replace with 14 LED 100W
Module StdElectronic
$18,900 $1,080
6 Vehicle Wash Bay 12 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 12 FLUOR (2)
T8 4' F32T8 32W High
Lumen (3100 lum) Program
HighEfficElectronic and Add
new Occupancy Sensor
$2,900 $230
7 Typical of all entire
office space, fuel
division (except
bathrooms)
57 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 57 FLUOR (2)
T8 4' F32T8 32W Standard
Program
HighEfficElectronic
$11,400 $605
8 Bathrooms 6 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Replace with 6 FLUOR (2)
T8 4' F32T8 32W Standard
Instant StdElectronic and
Add new Occupancy Sensor
$851 $30
9 Warehouse
Lighting
25 HPS 400 Watt Magnetic with
Manual Switching
Replace with 25 FLUOR (5)
T5 45.2" F54W/T5 HO
Energy‐Saver (2) HighLight
HighEfficElectronic
$25,290 $136
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
3 Head Bolt Heaters 11 Headbolt Heaters with
Manual Switching
Replace with 11 Headbolt
Heaters and Remove
Manual Switching and Add
new Other Controls
$2,760 $4,146
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
19
Appendix C
Equipment Schedule – Mechanical
ADDITIONAL GAS FIRED UNIT HEATERS ON-SITE, LOCATED IN VEHICLE
STORAGE BAY:
(8) Modine Model PAE125SG natural gas fired horizontal unit heaters, with 2.7A,
115V fan; 120,000 BTU/hr Input, 100,000 BTU/hr output
20
Appendix C
Equipment Schedule – Mechanical
21
Appendix C
Equipment Schedule – Mechanical
22
Appendix C
Equipment Schedule – Plumbing Fixtures
23 Appendix D Building Plan – Elevations
24 Appendix D Building Plan – First Floor
25
Appendix D
Building Plan – Second Floor
26 Appendix E Lighting Plan – First Floor
27
Appendix E
Lighting Plan – Second Floor
28 Appendix E Lighting Fixtures
29 Appendix E Lighting Fixtures
30
Appendix F
Mechanical Schematic