HomeMy WebLinkAboutCIRI-ANC-CAEC Old Transit-Paratransit 2012-EE
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ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 2 of 59
Project # CIRI-ANC-CAEC-33
Prepared for:
The Municipality of Anchorage
Old Transit Maintenance Building
(formerly called Radio Shop)
3601 Dr. Martin Luther King St
Anchorage, AK 99507
Paratransit Administration Building
3625A Dr. Martin Luther King St
Anchorage, AK 99507
Audit performed by:
Energy Audits of Alaska
P.O. Box 220215
Anchorage, AK 98522
Contact: Jim Fowler, PE, CEA#1705
Jim@jim-fowler.com
206.954.3614
Prime Contractor:
Central Alaska Engineering Company
32215 Lakefront Drive
Soldotna, AK 99699
Contact: Jerry Herring, PE, CEA#1484
AKEngineers@starband.net
907.260.5311
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 3 of 59
TABLE OF CONTENTS
1. Executive Summary 5
2. Audit and Analysis Background 13
3. Acknowledgements 15
4. Building Description & Function 16
5. Historic Energy Consumption 20
6. Interactive Effects of Projects 20
7. Loan Program 21
APPENDICES
Appendix A: Photos 22
Appendix B: AkWarm-C Report 29
Appendix C: Equipment Schedules 35
Appendix D: Additional, Building-Specific EEM detail 43
Appendix E: Specifications supporting EEM’s 46
Appendix F: Benchmark data 50
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 4 of 59
REPORT DISCLAIMERS
This audit was performed using American Recovery and Reinvestment Act (ARRA) funds,
managed by the Alaska Housing Finance Corporation (AHFC).
This energy audit is intended to identify and recommend potential areas of energy savings,
estimate the value of the savings and approximate the costs to implement the
recommendations. 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 recommendations should all be first analyzed through a thorough lighting analysis
to assure that the recommended lighting upgrades will comply with State of Alaska Statute
as well as Illuminating Engineering Society (IES) recommendations. Energy Audits of
Alaska, LLC and Central Alaska Engineering Company bear no responsibility for work
performed as a result of this report.
Payback periods may vary from those forecasted 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, Central Alaska
Engineering Company, 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.
AkWarm-C is a building energy modeling software developed under contract by AHFC.
This material is based upon work supported by the Department of Energy under Award
Number DE-EE0000095. This report was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States Government nor any
agency thereof, nor any of their employees, makes any warranty, express or implied, or
assumes any legal liability or responsibility for the accuracy, completeness, or usefulness
of any information, apparatus, product, or process disclosed, or represents that its use
would not infringe privately owned rights. Reference herein to any specific commercial
product, process, or service by trade name, trademark, manufacturer, or otherwise does
not necessarily constitute or imply its endorsement, recommendation, or favoring by the
United States Government or any agency thereof. The views and opinions of authors
expressed herein do not necessarily state or reflect those of the United States Government
or any agency thereof.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 5 of 59
1. Executive Summary
Building Owner:
Municipality of Anchorage (MOA)
3640 East Tudor
Anchorage, AK 99507
Building contact:
John Huzey
Manager Facility Maintenance
907-343-8312 office
Huzeyjm@ci.anchorage.ak.us
Alaska Housing Finance Corporation
P.O. Box 10120
Anchorage, AK 99510-1020
Contact:
Rebekah Luhrs
Energy Specialist
907-330-8141
rluhrs@ahfc.us
Guidance to the reader:
The Executive Summary is designed to contain all the information the building
owner/operator should need to determine how the subject building’s energy
efficiency compares with other similar use buildings, which energy improvements
should be implemented, approximately how much they will cost and their estimated
annual savings. Sections 2 through 7 of this report and the Appendices, are back-up
and provide much more detailed information should the owner/operator, or their
staff, desire to investigate further
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’s economy. The audit and
this report are pre-requisites to access AHFC’s Retrofit Energy Assessment Loans
(REAL) program, which is available to the building’s owner.
The purpose of the energy audit is to identify cost-effective system and facility
modifications, adjustments, alterations, additions and retrofits. Systems investigated
during the audit included heating, ventilation, and air conditioning (HVAC), interior
and exterior lighting, motors, building envelope, and energy management control
systems (EMCS).
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
The site visit to subject building occurred on December 5th, 2011.
The Transit Maintenance (TM) building was originally constructed in 1975 to house
signal and transit vehicle administration, operations, maintenance and wash
facilities. It currently houses these functions as well as a communications repair and
maintenance shop (ie. Radio Shop).
In 2008 the Paratransit Administration (PTA) building was constructed, attached to
the northwest corner of the subject building and sharing utilities. The north half of
the old wash bay was incorporated into the new PTA building and the wash bay was
renovated. There have been no other significant modifications other than a roof
replacement on the TM building in 1996.
The interior of the TM building is in average condition, while its exterior is in good
condition, considering its age. The PTA building is in excellent condition inside and
out.
Energy Consumption and Benchmark Data
This building uses natural gas provided by Enstar Natural Gas Co., and electricity
provided by Chugach Electric Association, Inc. Benchmark utility data for 2009 and
2010, obtained by the auditor is summarized in Tables 1 and 2 below and found in
detail in Appendix F.
Table 1
2009 2010
Consumption Cost Consumption Cost
Electricity ‐ kWh 466,288 $ 60,666 453,730 $ 48,184
Natural Gas ‐ CCF 75,895 $117,834 53,287 $ 45,906
Totals $178,500 $ 94,090
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 shown in Table 2
below.
Table 2
Subject
Building
New Transit
Maintenance
Building
(next door)
Northwood
Street
Maintenance
Building
Energy Use Index (EUI) ‐ kBTU/SF 196 209 282
Energy Cost Index (ECI) ‐ $/SF $3.33 $2.99 $3.70
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 7 of 59
The EUI’s in Table 2 can be compared to similar use buildings. It is in line with the
New Transit Maintenance building next door, and substantially lower than the
Northwood Street Maintenance building nearby (scheduled by MOA to be audited
later this year).
Various Energy Efficiency Measures (EEMs) have been analyzed for this building to
determine if they would provide energy savings with reasonably good payback
periods. EEMs are recommended for reasons including:
1.) they have a reasonably good payback period
2.) for code compliance
3.) end of life (EOL) replacement
4.) reasons pertaining to building management strategy, operations,
maintenance and/or safety
All the EEMs considered for this facility are detailed in the attached AkWarm-C
Energy Audit Report in Appendix B and in Appendix D. Each EEM includes payback
times, estimated installation costs and estimated energy savings.
The summary EEM’s that follow are the only EEM’s that are recommended for
this building. Others have been considered but are not deemed to be justified or
cost effective. The recommended EEM’s were selected based on consideration
from three perspectives: overall efficiency of building management, reduction in
energy consumption and return on investment (ROI).
Efficient building management dictates, as an example: that all lights be upgraded,
that lamp inventory variations be minimized and that all appropriate rooms have
similar occupancy controls and setback thermostats - despite the fact that a single or
several rooms may have an unjustifiably long payback on their individual lighting or
controls upgrade.
Some of the summary EEM’s below contain individual EEM’s that are grouped by
type (i.e. all relevant lighting upgrades are summed and listed as a single upgrade,
all thermostat setback retrofits are grouped together and listed as a single upgrade,
etc.). They are prioritized as a group, with the highest ROI (shortest payback) listed
first. Table 3 at the end of this section summarizes these EEM’s and Appendix B
(the AkWarm-C detailed report) and Appendix D provide additional detail pertaining
to each individual recommendation
A.) SETBACK THERMOSTATS – TRANSIT BUILDING
With few exceptions, all bays and rooms in the TM building have
thermostats which control room and/or zone temperatures. (The PTM
HVAC system is presumed to have temperature setbacks programmed
into its DDC control system and digital thermostats) It is recommended
that setback thermostats be installed and programmed to reduce room
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 8 of 59
temperatures to 55F during unoccupied periods. This summary EEM
combines the AkWarm-C retrofits detailed in Appendix B, items 2, 3, 5
& 15. They reflect the incorporation of unoccupied setback
temperatures of 55 deg F in all appropriate rooms.
Combined Setback Thermostat EEM’s:
Estimated cost $4,000
Annual Savings $5,282
Payback 9 months
B.) DE-STRATIFICATION FANS
In high bay spaces there is a typical temperature differential of 5F-10F
between the ceiling and the thermostat. De-strat fans typically save from
12%-23% in high-ceiling space-heating costs, depending on this temperature
difference and the ceiling height, by moving the warm air down to the
occupied space. It is recommended to add de-stratification fans to the vehicle
maintenance and west service bays. See Appendix D-4 for more detail.
De-Stratification Fan EEM:
Estimated cost $4,800
Annual Savings $3,680
Payback 1.3 years
C.) AIR INFILTRATION
It does not appear that automatic overhead door closers are in use at
this facility. In mixed use, vehicle maintenance and storage facilities
such as the TM 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 for 1 hour can result in up to
2.5 air changes in the vehicle bay. During the spring and autumn
months, this translates to $14 per open door per hour during in natural
gas heating costs, and in the winter months, $33 per open door per
hour. It is recommended to add automatic door closers with integral
personnel safety sensors, set to close the (10) overhead 1-3 minutes
after opening. Appendix E contains a product specification for
industrial grade personnel/vehicle/motion sensing safety devices for
automatic overhead door closers. For detail see Appendix D-2.
Air Infiltration EEM:
Estimated cost $10,000
Annual Savings $ 3,107
Payback 3.2 years
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 9 of 59
D.) LIGHTING AND LIGHTING CONTROLS
Interior Office Lighting – The TM building offices have inconsistent
lighting, which adds to maintenance and inventory costs as well as
occupant discomfort and reduces productivity. It appears that fixtures
have been upgraded from magnetic to electronic ballasts, and from
T12 to T8 lamps as the original fixtures and lamps burned out. There
is a large potential savings, from both energy consumption and
maintenance standpoints. It is recommended that all T12 lamps and
magnetic ballasts be replaced with T8-28watt lamps and high
efficiency electronic ballasts.
Additionally, in the interest of energy and building management and
occupant comfort, at the next building re-lamp (or during the retrofit
from T12 to T8) all the existing T8-32 watt lamps should be replaced
with T8-28 watt, energy saver lamps which result in a 4% reduction in
light output (typically not noticeable), and more importantly, a 12%
reduction in energy consumption.
High Bay Vehicle Maintenance Lighting – in either 2009 or 2010 the
(43) 150W high pressure sodium (HPS) lamps in the vehicle bay were
replaced with (246) T5-54 watt lamps. Although the quality of lighting
is greatly enhanced, the upgrade consumes approximately 6150
KWh/yr more electricity ($870/yr) than the old HPS fixtures. In order
for this kind of lighting upgrade to be cost effective, occupancy controls
must be installed to take advantage the on/off capability of T5 lighting.
Zoned occupancy controls are recommended and included in this
summary EEM.
Lighting Controls: 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 to
install motion sensing occupancy sensors in the existing duplex
switch boxes for all offices, corridors and stairwells, and to install
ceiling mounted, dual technology sensors 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. Zoned occupancy
controls are typically recommended for corridors, large vehicle bays
and storage areas. Zoned controls are designed to activate and de-
activate lighting by zone, or by row, based on the location of the
occupant. Occupancy sensors can reduce power consumption by 25-
60%. Paybacks on occupancy sensors range from 1 to 3 years,
depending on the light fixture consumption and occupancy of the room.
This EEM combines Appendix B, items 4, 6-14, 17-21 and 23. See
these items for detailed cost estimates, savings and paybacks on the
specific lighting retrofits recommended
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 10 of 59
Combined Lighting and Lighting Control EEM’s:
Estimated cost $41,211
Annual Savings $ 8,586
Payback 4.8 years
E.) BUILDING SHELL INSULATION
There are over 7000 square feet of walls (per plans – most of this wall
section is in the APD evidence bay and not accessible) in the TM
building that are bare CMU’s which have an R value of 1.0. It is
recommended to fur out the inside walls and add R-15 rigid insulation.
See Appendix D-3 for detail.
Building Shell Insulation EEM:
Estimated cost $31,000
Annual Savings $ 6,887
Payback 4.6 years
F.) MOTORS
It Is recommended that all motors 3HP or larger, operating for 1500
hours or longer at continuous speed, be replaced at EOL with premium
efficiency motors. Typical payback for the incremental cost difference
at EOL of a premium efficiency motor is 2-10 years, while the motor life
is 20+ years. See table 4 in Appendix D-5 for complete motor listing
and recommended premium upgrades.
Summarized Motor Replacement EEM:
Estimated cost $ 500
Annual Savings $ 90
Payback 5.5 years
The total estimated cost and estimated annual savings of the six (A. through
F.) summary EEM’s listed above.
Table 3
Combined total of priority, high‐ROI,
strategically recommended EEM’s listed above:
Estimated total cost $ 91,511
Annual Savings $ 27,632
Simple payback 3.3 years
Does not include design or construction management costs
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 11 of 59
G.) HVAC SYSTEM
These HVAC recommendations are included in the executive summary
for planning & budgetary purposes. The resulting capital expenditure
for the TM building could be large, and although energy savings will
eventually result from the EEM, this particular capital investment is not
expected to provide a high return. Furthermore, it is expected that the
payback from a systems adjustment in the PTA building will be seen
more in occupant comfort and performance, rather than in direct
energy savings.
Transit Building HVAC System:
The various HVAC systems in the Transit building are not well
integrated from a building systems standpoint. Heat is generated by a
disconnected set of horizontal furnaces and gas fired radiators
supplying the vehicle bays and a boiler supplying building hydronics.
The system appears to be marginally dysfunctional (as demonstrated
by an air conditioning unit blowing exhaust air down the hallway); it
was reported by occupants to be uncomfortable and is undoubtedly
inefficient. This EEM recommends an overall, systems level
engineering evaluation of the buildings HVAC, and development of a
5-10 year strategy (if not already in place) to upgrade the system as
components reach their EOL. Several HVAC components appear to
be nearing EOL, including the V-1 Rupp furnace, the H-4 Multi-Temp
boiler, the V-7 air handler and the V-5 exhaust fan.
Paratransit Building HVAC System:
This is a new system, but based on occupant feedback and auditor
observations, appears to require adjustment. Presumably the VAV
boxes serving each room, and their hydronic valves are controlled by
room thermostats, which should allow occupants of any room to control
temperature. This does not appear to be fully functional, or control
system lockout parameters are precluding desired occupant control.
Occupants reported the building to be consistently cold, as
demonstrated by the 5 personal heaters in 10 offices visited. This
EEM recommends that a HVAC controls audit be performed to adjust
system parameters to enhance occupant comfort and assure optimal
system operation.
Combined HVAC System EEM’s for both buildings:
Estimated cost of engineering evaluation
and PT HVAC adjustments: $15,000
Annual Savings unknown
Payback unknown
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 12 of 59
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. 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.
4. Close overhead doors immediately after entering the vehicle bay.
The total of all 28 recommendations listed in Appendix’s B and D of this report,
estimate to save $29,283/year, with an installed cost of $98,986. The combined
payback on this investment is 3.4 years. This does not include design or
construction management services,
Some of the costs totaling $98,986 are incremental costs for higher efficiency
replacements, so actual budgetary costs for unit replacements will be higher. See
individual EEM’s for further detail.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 13 of 59
2. Audit and Analysis Background
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, hot water generation, and
heating, ventilating, and air conditioning (HVAC) equipment. The auditor may or
may not identify system deficiencies if they exist. The auditors role is to identify
areas of potential savings, many of which may require more detailed investigation
and analysis by other qualified professionals.
a. 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
b. Benchmark Utility Data Validation: Benchmark utility data provided through
AHFC’s initial phase of their REAL program is validated, confirming that meter
numbers on the subject building match the meters from which the energy
consumption and cost data were collected. If the data is inaccurate or missing,
new benchmark data is obtained. In the event that there are inconsistencies or
gaps in the data, the existing data is evaluated and missing data points are
interpolated.
c. Method of Analysis: The information gathered prior to the site visit and during
the site visit is entered into AkWarm-C, an energy modeling software program
developed specifically for Alaska Housing Finance Corporation (AHFC) to identify
forecasted energy consumption. The forecasts can then 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. Cost estimates are +/- 30% for this level of audit, and are derived from
one or more of the following: Means Cost Data, industry publications, experience
of the auditor, local contractors and/or equipment suppliers. Brown Electric,
Haakensen Electric, Proctor Sales, Pioneer Door, and J.P. Sheldon, all in
Anchorage, were consulted for some of the lighting, boiler, overhead door and air
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 14 of 59
handling (respectively) retrofit and/or replacement 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 ROI is
calculated. The simple payback period is 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.) In cases where the EEM recommends replacement at
EOL, the incremental cost difference between the standard equipment in place,
and the higher efficiency equipment being recommended is used as the cost
basis for payback calculation. The SIR found in the AkWarm-C report is the
Savings to Investment Ratio, defined as the breakeven cost divided by the initial
installed cost.
A simple life-time calculation is included in the AkWarm-C calculation 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 may only act as an approximation. In some instances, several
methods may achieve the identified savings. This report is not a 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.
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PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 15 of 59
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. The Municipality of Anchorage (Owner): MOA provided a review and brief
history of the benchmarked buildings, building selection criteria, building plans,
equipment specifications, building entry and coordination with on-site personnel.
c. Central Alaska Engineering Company (Benchmark TSP): CAEC oversaw the
compilation of electrical and natural gas consumption data through their
subcontractor, Energy Audits of Alaska, LLC. CAEC also entered that data into
the statewide building database, called the Alaska Retrofit Information System
(ARIS). CAEC was awarded the auditing contract for this MOA building.
d. Energy Audits of Alaska (energy auditor): This firm has been selected to
provide audits under this contract. The firm has two mechanical engineers,
certified as energy auditors and/or professional engineers and has also received
additional training from CAEC and other TSP’s to acquire further specific
information regarding audit requirements and potential EEM applications.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
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4. Building Description and Function:
The site visit and survey of subject building occurred on December 5th, 2011. The
ambient temperature was 30F. The TM Building and PTA Buildings share a wall,
and when the PTA building was constructed, it annexed the north section of the
TM’s west bay – so the buildings are now “nested”. Simplified current floor plan:
North
Paratransit Building
The two buildings share a natural gas supply line. They have independent electric
meters, but it is not clear which meter supply’s which loads in the two story section
where the buildings are nested. For these reasons, the buildings and gas and
electric consumption were combined for this audit.
The TM’s vehicle maintenance bay includes approximately 21,000 square feet of
high bay space, of which 4525 square feet have been cordoned off with a wall, by
the Anchorage Police Department (APD) for evidence storage. The APD space is
heated by the TM’s radiant heaters and gas furnace, and uses the TM’s electrical
supply. It was not accessible during this audit.
The PT building has two floors of approximately 10,800 square feet of offices. There
are an additional 6890 square feet of offices on the two floors in the west section of
the TM building, and 2500 square feet of high bay vehicle service along the west
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 17 of 59
wall of this section. Total size of the building complex, calculated from plans is
40,950 square feet.
Both buildings are constructed on a mesh filled concrete slab on grade. The TM
building is constructed of 12” concrete masonry units (CMU) except the west wall,
which uses 8” steel studs finished with concrete stucco. It roof is supported by 38”
steel trusses 48” on center (OC) supported by 39” glue lam beams. The PTA
building walls are constructed of 6” steel studs, finished with a brick veneer, its roof
is supported by 16” steel joists 80” OC. All finished interior walls are gypsum.
Concrete plaster was used to finish the CMU walls in the wash bay. All windows
are in excellent condition, aluminum, double pane, and those in the TM building
appear to have been upgraded from their original 1975 installation.
Building details are as follows:
a. TM Heating System: Heat is supplied to the offices via hydronic
finned tube baseboards by a Multi-Temp 500 MBH gas fired, cast
iron sectional boiler. Storage spaces are supplied via hydronic
unit heaters running wild (i.e. no fluid control, local thermostat
controls fan only). The west service bay is heated by a Rupp gas
fired horizontal furnace with 1790 MBH capacity and ceiling
mounted, infra-red (IR), radiant tube using gas fired, in-line Ambi-
Rad burners (50 MBH ea per original plan schedules). The large
vehicle bay is heated by 2 ceiling mounted units presumed to be
gas fired furnaces. Original plans show 2 more Rupp units, but
they have since been replaced and neither nameplate data or
specifications were available. The vehicle bay is also heated with
the same IR, radiant tube, gas fired system used in the west
service bay. The wash bay’s IR radiant tube system has been
upgraded with 100 MBH Modine in-line burners. All zone and
room temperatures are controlled by local low voltage adjustable
thermostats.
b. PTA Heating & Cooling System: A gas fired, sealed combustion
forced draft stainless steel, 399 MBH, 93% efficient boiler supply’s
heat to this building rooms via hydronics and variable air volume
(VAV) boxes. A direct gas fired, rooftop 250 MBH air handler unit
(AHU) supply’s pre-heated air to the VAV boxes. The AHU also
supply’s 15 Tons of cooling via the VAV boxes; it has a SEER
rating of 14.5. The server room has its own thermostat and
exhaust fan, but does not appear to have a dedicated AC unit.
The PTA building has a snow melt system for the sidewalks on
the north side, utilizing a shell & tube heat exchanger located in
the boiler room and has sequence of operation parameters that
include a slab snow detection, outside air temperature shut down
and a reversion to idle mode if the boiler can’t sustain the load.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 18 of 59
c. Ventilation: Ventilation and make up air is provided to the TM
building’s high bay spaces through the (3) Rupp furnaces and to
the TM offices via the AHU in the boiler room. These all appear
to be constant volume. Ventilation for the PTA building is
provided by the rooftop AHU which has variable frequency motor
drives (VFD), variable air volume control and an outside air
temperature reset. Exhaust fans in the PTA building are
interlocked to the AHU. There is a make-up air unit (MAU), also
rooftop, providing make up air for the wash bay’s large exhaust
fan. In the TM’s vehicle bay, there is a vehicle exhaust system,
as well as 2 rooftop mounted exhaust fans. The 2 Rupp furnaces
provide make up air for these units, and are presumably
interlocked to the exhaust fans. Toilet rooms in both buildings
have exhaust fans, as do several storage areas.
d. Appliances: There are 2 older full size refrigerators located in the
west service bay and the lunch room of the TM building, and two
new units in the PTA building. The older units are recommended
for replacement with Energy Star units at EOL in AKWarm-C, see
Appendix B-1 for details.
e. Plumbing Fixtures: Both buildings contain a total of (12) toilets,
(5) urinals, (13) lavatory sinks and (2) showers. All fixtures are
manually operated and appear to be post-1992, so consume 1.6
gpf (toilets) and 1 gpf (urinals) and 2.6 gpm (shower heads). See
Appendix D-1 for EEM recommendations.
f. Domestic Hot Water: Hot water is provided to showers and
lavatories in the TM building by a 50 gallon, direct gas fired
Rheem hot water heater located in the TM boiler room, and to the
lavatories and small kitchenette in the PTA building by a 75 gallon
direct gas fired A.O. Smith unit located in the PTA boiler room.
g. Head Bolt Heaters: There are 3 duplex, GFI receptacles suitable
for head bolt heaters on the outside of both buildings. They did
not appear to be in use during this audit. Appendix E includes a
microprocessor controlled receptacle retrofit if these outlets are
used for headbolt heating in the future.
h. Interior Lighting & Controls: The TM building has an
inconsistent mix of interior lighting which includes magnetic and
electronic ballasts and T12 and T8 lamps. The high bay vehicle
maintenance area and the west service bay have been upgraded
to T5 and T8 lighting, respectively. There are no occupancy
sensors in use in this building. All exit signs in both buildings are
either LED, unlit or self luminous. Completion of a full lighting
upgrade for the TM building is recommended in the AkWarm-C
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 19 of 59
report in appendix B. The lighting in the PTA building is current
state of the art, except that there are rooms and spaces, including
corridors and offices, where occupancy sensors could be
installed. This is recommended in the AKWarm-C EEM’s in
Appendix B.
i. Exterior Lighting: Exterior lighting for both buildings has been
upgraded to LED wall packs. Unfortunately, 6-8 of the units have
leaked and are non-functional due to water damage. The
maintenance staff were replacing defective units during this audit,
stating that the manufacturer had provided new units at no cost to
MOA. All are presumed to be controlled by photo-sensors.
j. Building Shell: The building shell appears to be in good
condition, although by today’s standards, it is under-insulated in
certain areas, most notably, the bare CMU walls which have an
insulation value of R-1. See Appendix D-3 for EEM
recommendation. All overhead doors appear to have been
replaced, are in good condition and appear to have an insulation
value of R-7.
k. Motors: There is a large quantity and diversity of motors in use in
this building complex. Generally, motors of 3 HP and greater
should be looked at for replacement with premium efficiency
motors. Most of the large motors in this facility are used in the
wash bay, which was re-furbished in 2008, so the motors are
relatively new and already of premium efficiency. Nonetheless,
Appendix D-5 identifies possible efficiencies to be gained through
motor replacements.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 20 of 59
5. Historic Energy Consumption: Energy consumption is modeled within the
AkWarm-C program. The program typically analyzes twelve months of data. Two
year’s worth of natural gas and electricity consumption were averaged then input
into AKWarm-C.
Energy consumption was analyzed using two factors: the Energy Cost Index (ECI)
and the Energy Use Index (EUI). The energy cost index takes the annual costs of
gas and electrical energy over the surveyed period of time (two years) divided by the
square footage of the building. The ECI for this building is $3.33/SF, the ECI for the
building next door (the new Transit Maintenance Building) $4.62, and the ECI for the
Bering Street Heavy Shops, a third building in Anchorage with similar usage, is
$2.39. Reasons for the ECI differences are discussed earlier in this report.
The energy use index (EUI) is the total annual average electrical and heating energy
consumption expressed in thousands of BTUs/SF. The average of the 2009 and
2010 EUI for this building is 196 kBTU/SF; the average EUI for the New Transit
Maintenance building is 322 kBTU/SF and 141 kBTU/SF for the Bering Street Heavy
Shops. Again, reasons for the EUI are discussed in this report.
6. Interactive Effects of Projects: The AkWarm-C program calculates savings
assuming that all recommended EEM are implemented in the order shown in
Appendix B. Appendix D EEM’s are not included in the AkWarm-C model. If some
EEMs are not implemented, savings for the remaining EEMs will be affected, in
some cases positively, and in others, negatively.
In general, all projects were evaluated sequentially so that energy savings
associated with one EEM would not be attributed to another EEM as well. 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.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 21 of 59
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.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 22 of 59
Appendix A
Photos
Replacement of defective LED wall packs is underway
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 23 of 59
Upgraded furnaces in vehicle maintenance bay. Nameplate not accessible and
specification not available.
Upgraded high bay lighting in TM vehicle bay. Occupancy sensors are
recommended in order to capitalize on this pre-existing improvement.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 24 of 59
Radio frequency/electromagnetic frequency (RFI/EMI) shielded enclosure in
Communication Shop
Workstation inside RFI/EMI enclosure
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 25 of 59
“Battery Room” in Communications Shop with charging stations
“V-Max” wash machine in wash bay of TM building. 10HP blowers in background,
gantry transport at top
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 26 of 59
“Sprinkler Room” located in wash bay, contains hot water boiler, chemical delivery
and main wash pumps serving the “V-Max” wash machine.
.
Boiler room in TM building; Air handler, “V-7” on far left wall
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 27 of 59
Typical Paratransit bulding dispatch work station. Rotating dispatch personnel on
duty 117 hrs/week.
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Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 1
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 1/8/2012 1:00 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Combined MOA Transit Maintenance Building
and Paratransit Administration Building
Auditor Company: Energy Audits of Alaska
Address: Transit Maint 3601 Dr. Martin Luther King Jr.
Ave; Paratransit Admin 3625A Dr. Martin Luther King Jr.
Ave
Auditor Name: James Fowler
City: Anchorage Auditor Address: P.O. Box 220215
Client Name: Mike Fleagle
Client Address: 3640 E. Tudor
Anchorage, AK 99507
Auditor Phone: (206) 954‐3614
Auditor FAX: ( ) ‐
Client Phone: (907) 343‐8248 Auditor Comment:
Client FAX:
Design Data
Building Area: 40,950 square feet Design Heating Load: Design Loss at Space: 1,340,193
Btu/hour
with Distribution Losses: 1,489,103 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 2,269,974 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 35 people Design Indoor Temperature: 70.2 deg F (building average)
Actual City: Anchorage Design Outdoor Temperature: ‐18 deg F
Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F‐days
Utility Information
Electric Utility: Chugach Electric ‐ Commercial ‐ Lg Natural Gas Provider: Enstar Natural Gas ‐ Commercial ‐
Lg
Average Annual Cost/kWh: $0.135/kWh Average Annual Cost/ccf: $0.709/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting Refrige
ration
Other
Elec‐
trical
Cook‐
ing
Clothes
Drying
Vent‐
ilation
Fans
Service
Fees Total Cost
Existing
Building
$46,111 $3,778 $7,672 $25,722 $282 $19,637 $0 $0 $4,879 $1,973 $110,054
With
Proposed
Retrofits
$27,823 $2,811 $7,672 $14,821 $161 $18,623 $0 $0 $4,886 $1,973 $80,770
SAVINGS $16,288 $967 $0 $10,901 $120 $1,015 $0 $0 ‐$7 $0 $29,283
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 2
$0 $5,000 $10,000 $15,000 $20,000
Floor
Wall/Door
Window
Ceiling
Air
Existing Retrofit
Annual Space Heating Cost by Component
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 3
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Refrigeration: Old FS
refers
Replace with 2 Energy Saver
refrigerators at EOL
$866 $75 73.74 0.1
2 Setback Thermostat:
Wash Bay
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for the
Wash Bay space.
$829 $200 52.76 0.2
3 Setback Thermostat:
Vehicle bays
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for the
Vehicle bays space.
$2,838 $800 45.13 0.3
4 Lighting: High Bay
lighting ‐ Transit
Vehicle Shop
Remove Manual Switching
and Add new Occupancy
Sensor
$2,906 $2,000 9.23 0.7
5 Setback Thermostat:
West Service Bay
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for the
West Service Bay space.
$1,403 $400 43.76 0.3
6 Lighting: Interior ‐
Transit ‐ T12‐2 lamp,
elec ballast
Replace with 16 FLUOR (2) T8
4' F32T8 28W Energy‐Saver
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$191 $342 7.93 1.8
7 Lighting: Interior
Lighting ‐ Paratransit
dispatch ‐ T8‐3 lamp
At next re‐lamp, replace 17
FLUOR (3) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$312 $603 3.28 1.9
8 Lighting: Interior
Lighting ‐ Paratransit
dispatch ‐ T8‐2 lamp
At next re‐lamp, replace 14
FLUOR (2) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$234 $684 2.17 2.9
9 Lighting: Interior
Lighting ‐ Transit ‐
T8‐4 lamp
At next re‐lamp, replace 22
FLUOR (4) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$225 $714 2.00 3.2
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
10 Lighting: Interior
Lighting ‐ Paratransit
‐ T8‐3 lamp
At next re‐lamp, replace 103
FLUOR (3) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$1,206 $2,227 3.45 1.8
11 Lighting: Interior
Lighting ‐ Paratransit
dispatch ‐ recessed
can lighting
Remove Manual Switching
and Add new Occupancy
Sensor
$142 $500 1.80 3.5
12 Lighting: Interior
Lighting ‐ Remodeled
Transit ‐ T8‐3 lamp
At next re‐lamp, replace 70
FLUOR (3) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant HighEffic
Electronic and Remove
Manual Switching and Add
new Occupancy Sensor
$608 $2,430 1.59 4
13 Lighting: Interior
Lighting ‐ Transit ‐
T12‐4 lamp, elec
ballast
Replace with FLUOR (4) T8 4'
F32T8 28W Energy‐Saver (2)
Instant StdElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$33 $198 1.53 6
14 Lighting: Interior
Lighting ‐ Transit ‐
T8‐2 lamp
At next re‐lamp, replace 50
FLUOR (2) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$307 $1,500 1.30 4.9
15 Setback Thermostat:
Transit offices ‐ first
and second floor
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for the
Transit offices ‐ first and
second floor space.
$212 $2,600 1.04 12.3
16 Other Electrical: PC's
with Monitor ‐
dispatch office hours
Replace with Laptop and 14
extra monitors
$261 $1,800 0.92 6.9
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 5
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
17 Lighting: Interior
Lighting ‐ Paratransit
‐ T8‐2 lamp
At next re‐lamp, replace 18
FLUOR (2) T8 4' F32T8 32W
lamps with 28W Energy‐Saver
lamps Instant StdElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$141 $708 1.27 5
18 Lighting: Interior
Lighting ‐ Transit ‐
T12‐2 lamp, mag
ballast
Replace with 81 FLUOR (2) T8
4' F32T8 28W Energy‐Saver
Instant HighEfficElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$1,546 $18,835 0.92 12.2
19 Lighting: Interior
Lighting ‐ Remodeled
Transit ‐ T8‐2 lamp,
17W
Remove Manual Switching
and Add new Occupancy
Sensor
$41 $300 0.86 7.4
20 Lighting: Interior
Lighting ‐ Transit ‐
T12‐2 lamp, 96" mag
ballast
Replace with 41 FLUOR (2) T8
4' F32T8 28W Energy‐Saver
Instant HighLight
HighEfficElectronic and
Remove Manual Switching
and Add new Occupancy
Sensor
$653 $9,670 0.65 14.8
21 Lighting: Interior ‐
Transit ‐ T12‐4 lamp
Mag ballast
Replace with FLUOR (4) T8 4'
F32T8 28W Energy‐Saver (2)
Instant HighEfficElectronic
and Remove Manual
Switching and Add new
Occupancy Sensor
$38 $350 0.68 9.3
22 Other Electrical: PC's
with monitor ‐
normal office hours
Replace with 28 Laptop $527 $5,600 0.60 10.6
23 Lighting: Interior
Lighting ‐ Transit ‐
CFL
Remove Manual Switching
and Add new Occupancy
Sensor
$3 $150 0.14 45.7
Appe
ndix
D‐1
Plumbing Fixtures:
(12) W.C., (13)
lavatories, (5)
urinals, (2) showers
Replace shower heads and
lavatory fixtures with low
flow versions; replace toilet,
urinal and lavatory valves
with proximity sensing on/off
controls
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Combined MOA Transit Maintenance Building and
Paratransit Administration Building
Page 6
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
Appe
ndix
D‐2
Overhead Doors –
Air Infiltration
Addition of automatic timer‐
based overhead door closers
should reduce air infiltration
by 50%. See Appendix E for
safety device to prevent
inadvertent closings on
personnel or vehicles.
$3,107 $10,000 3.2
Appe
ndix
D‐3
Building shell
Insulation
Furr out inside of bare CMU’s
walls with 2x4, install 3” rigid
foam insulation, finish with
moisture proof gypsum.
Increase R value by 15.
$6,887 $31,000 4.6
Appe
ndix
D‐4
De‐Statification Fans Install (8) de‐stratification
fans in vehicle maintenance
and west service bays.
$3,680 $4,800 1.3
Appe
ndix
D‐5
Motor replacements Replace V‐1 Rupp furnace and
V‐5 exhaust fan motors with
premium efficiency versions
at EOL.
$90 $500 5.5
TOTAL $29,283 $98,986 2.72 3.4
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 35 of 59
Appendix C – Equipment Schedules – Transit Building
EQUIPMENT SCHEDULES FOR TRANSIT BUILDING ‐ COMPILED FROM PLANS OR ON‐SITE
NAMEPLATE OBSERVATION, WHERE ACCESSIBLE (e = estimated)
AIR HANDLER SCHEDULE
SYMBOL MFGR/MODEL FAN CFM
MOTOR DATA
HP/VOLTS/PH REMARKS
V‐7 Pace A‐14/12F 3000e 2/208/3 located in Boiler room
EXHAUST FAN SCHEDULE
SYMBOL MOTOR MFGR/MODEL CFM
MOTOR DATA
HP/VOLTS/PH REMARKS
V‐2 Pace CRE‐30‐AF 12400 5/480/3 Vehicle exhaust
V‐3 Pace CRE‐15F 2200 1/480/3
V‐5 Pace CRE‐24‐AF 4000 5/480/3 West Service bay
V‐6 Pace CRE‐12F 1750 .75/508/3 Second floor lavatories
V‐7 Pace A‐12 3100 2/480/3
V‐15 National D‐200 3000e 2/208/3 Floor Exhaust, vehicle bay
PUMP SCHEDULE
SYMBOL MFGR/MODEL GPM
MOTOR DATA
HP/VOLTS/PH REMARKS
H‐7 Grundfos UMC 65‐80 15e 510W/115/1
main glycol circ, Transit
offices
H‐9 Bell & Gossett SLC‐25 15e 92W/115/1 Glycol circ to V‐7 AHU
P‐14 Gilbarco SPT‐13 20e .3/208/1 Fuel pump
P‐18 Bell & Gossett 5e .17/120/1 DWH re‐circ
P‐19 Federal 1.5P‐.5‐4 50 .5/120/1 Sump pump
M‐3 Lube pumps 15 .5/115/1e
M‐4 Lube pumps 15 .5/115/1e
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 36 of 59
BOILER SCHEDULE
SYMBOL MFGR/MODEL
MOTOR DATA
HP/VOLTS/PH REMARKS
H‐4 Multi‐Temp 1/115/1
500 MBU input, 400 MBH
output, 80% efficient, cast
iron sectional boiler,
supplying office hydronics,
located in 206 Mechanical
room
no tag Raytherm Hot Water Boiler 2/120/1
Direct fired, tankless NG hot
water heater suppling vehicle
washer, located in "sprinkler
room"
UNIT HEATER SCHEDULE
SYMBOL MFGR/MODEL
CFM
(e=est.)
MOTOR DATA
HP/VOLTS/PH REMARKS
H‐3A Trane UHSA 100S Hydronic 1200e .33/115/1
Transit bldg ‐ located in 119 ‐
radio shop, rarely on
according to onsite
personnel, local tsat, running
wild
H‐3B Trane UHSA 100S Hydronic 1200e .33/115/1
Transit bldg ‐ located in 208 ‐
storage area, local tsat,
running wild
UH‐1A Modine HC‐18S01 340 .02/115/1
Paratransit bldg ‐ located in
125 ‐ parts room, local tsat
CUH‐1 Modine CW‐2‐58 250 .03/115/1
Paratransit bldg ‐ Vestibule
on south side
CUH‐2 Modine CW‐3‐58 330 .03/115/1
Qty 3 ‐ Paratransit bldg ‐
Vestibules on north side and
in C127
UH‐1B Trane UHSA 100S Hydronic 1200e .33/115/1
Transit bldg ‐ located in
Boiler room
HOT WATER GENERATOR SCHEDULE
SYMBOL MFGR/MODEL
GALLON
S
NUMBER OF
ELEMENTS ELEMENT SIZE
no tag Rheem ST120 115
Storage tank only ‐ located in
wash bay, serves Paratransit
bldg
no tag Rheem 42V50‐50F 50
Direct NG fired water heater,
50 MBH, assumed 80%
efficient
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 37 of 59
RADIATION SCHEDULE
SYMBOL MFGR/MODEL Quantity
MBH of each
unit
no tag Modine TLP100H34 2 100
NG fired in‐line burner, 100
MBH in, 90 MBH out, 90%
efficient
no tag Ambi‐Rad "ARC" series 14 40
MBH, model, and 92%
efficiency are all estimated
from mfg website, since
nameplate not accessible,
and not in plans
RCP‐1 Aitex HPH2448 1 1.68 Radiant ceiling panel
FURNACE SCHEDULE
SYMBOL MFGR/MODEL FAN CFM
MOTOR DATA
HP/VOLTS/PH REMARKS
V‐1A Rupp CFA‐18 10000 7.5/460/3
Rupp model number is from
plans, nameplate not
accessible; HP from Rupp
performance curves; Model
CFA‐18 has max heating
capacity of 1790 MBH per
Rupp website, assume 75%
efficiency
V‐1B Rupp CFA‐18 10000 7.5/460/3
Per plans, these furnaces
were located on ceiling of
vehicle bay, they have been
replaced with a Greenheck
units (not confirmed ‐
nameplate not accessible,
specifications not available).
CFM, motor HP and NG fired
nature of this unit is assumed
based on the Rupp unit it
replaced and on‐site
observations of NG
plumbing. V‐1C Rupp CFA‐18 10000 7.5/460/3
PLUMBING FIXTURES
SYMBOL FIXTURE GPF QUANTITY REMARKS
W.C. 1.6 12 manually operated
Urinal 1 5 manually operated
Lavatory ‐ 13 manually operated
Showers 2.6 gpm 2 manually operated
semi‐circular sink ‐ 2 foot bar activation
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 38 of 59
EQUIPMENT ‐ WASH BAY (see usage assumptions below)
QUANTITY EQUIPMENT
MOTOR DATA
HP/VOLTS/PH REMARKS
1
STA‐RITE HP10F‐02 pump with
A.O. Smith motor 1.5/208/1
Chemical delivery ‐ rinse
system
2
OMNI DC2BXFP pump, Baldor
motor .25/115/1 ‐ 64%
Pulse feed chemical
delivery/mix system
6 Vmax Vehicle wash ‐ dryers
10/208/3 ‐
89.5% Dryer blower motors
1
Vmax Vehicle wash ‐ transport
motor 2/208/1e
rack transport drive motor ‐
estimated
2 Leeson C6T17FK6G 1/208/1 ‐ 64%
secondary pump, main wash
supply
2
Belanger vehicle wash ‐ Leeson
pump C284T17FB7C
25/460/3 ‐
92.4% main wash supply pumps
1
Landa VHG4‐22024B Steam
Cleaner
6.2/230/3 ‐
87.5% 353 MBU input, NG fired
Wash bay usage assumptions:
‐ 12 washes per day @ 45 min per wash
‐ each wash utilizes 30 min steam clean then 10 min wash machine cycle, 5 min in/out and prep
‐ each wash machine cycle utilizes 10 min transport motor, 8 min main wash pumps, 4 min dryers, 2 min
rinse cycle, 2 min chemical pulse feed
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 39 of 59
EQUIPMENT ‐ VEHICLE AND SERVICE BAY
QUANTITY EQUIPMENT
MOTOR DATA
HP/VOLTS/PH REMARKS
1
Coats 850S Tire Balancing
machine 15A/115/1
1 Dayton 7" Bench Grinder .5/115/1
1 Landa SJ‐15B Parts washer 23A/230/3
1 Mechanical vehicle lift 2/208/1
10
LiftMaster Overhead door
openers .75/208/1
1 Paint Hood 2/208/1
1 Powermatic floor drill press 1/115/1
1 Small utility compressor 3/115/1
1 Delta 8" bench grinder .5/115/1
1 Delta 16" coping saw .25/115/1e
1 Delta 2" belt sander .3/115/1e
1 Cutoff Saw .5/115/1e
1 125A Arc Welder 10Kw/208/3
LIGHTING SCHEDULE
FIXTURE
TYPE DESCRIPTION LAMPS MOUNTING
NUMBER WATTS TYPE HEIGHT
Wall pack LED ‐ Exterior 1 22 surface 20'
Wall pack LED ‐ Exterior 1 72 surface 20'
T12‐2
lamp
Florescent, 48" T12 lamps, magnetic
ballast 2 40 surface/recessed ceiling
T12‐2
lamp
Florescent, 48" T12 lamps, electronic
ballast 2 40 surface/recessed ceiling
T12‐4
lamp
Florescent, 48" T12 lamps, magnetic
ballast 4 40 surface/recessed ceiling
T12‐4
lamp
Florescent, 48" T12 lamps, electronic
ballast 4 40 surface/recessed ceiling
T12‐2
lamp
Florescent, 96" T12 lamps, magnetic
ballast 2 75 surface ceiling
T8‐2 lamp
Florescent, 48" T8 lamps, electronic
ballast 2 32 surface/recessed ceiling
T8‐4 lamp
Florescent, 48" T8 lamps, electronic
ballast 4 32 recessed ceiling
Downlight Compact Florescent, single lamp 1 15 recessed ceiling
T5‐6 lamp
Florescent, 45.5" T5 lamps, electronics
ballast 6 54 surface ceiling
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 40 of 59
Appendix C – Equipment Schedules - Paratransit Administration Building
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
Appendix C – Equipment Schedules - Paratransit Administration Building
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 42 of 59
Appendix C – Equipment Schedule – Paratransit Administration Building
PARATRANSIT ADMINISTRATION BUILDING EQUIPMENT NOT IN PLAN SCHEDULES
QUANTITY EQUIPMENT
MOTOR DATA
HP/VOLTS/PH REMARKS
1
ThyssenKrupp Hydraulic
Elevator EP07020 20/460/3
Submersible motor, duty cycle 80
starts/hr, 30% time on; used 20+
times per day according to onsite
personnel
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 43 of 59
Appendix D
Additional, Building-Specific EEM details
D-1: Plumbing fixtures: All urinals should be retrofitted or be replaced with ultra low
flow models. Faucet and toilet fixtures should have proximity sensing on/off controls.
This audit does not include water usage and AkWarm-C does not allow for the
modeling of it, but a typical faucet retrofit will result in 30% water savings and will
payback in less than 3 years. Ultra low flow urinals (1 pint to ½ gallon per flush) can
save up to 66% of water used, and typically pay back within 3 years. These payback
periods are reduced by 66% or more if the fixture is replaced at its EOL rather than
while it’s still functioning. Then the cost used is the incremental difference in cost
between an ultra-low-flow fixture and a straight across replacement with the same
fixture.
D-2: Air Tightening and Infiltration: One overhead door open for 1 hour is estimated
to result in 2.5 air changes in a space the size of the vehicle bay in the TM building. In
the spring and autumn, with a 30F temperature difference between the heated inside
space and the outside air, an open overhead door is estimated to result in $14.30/hour
in fuel costs. In the winter, with a temperature differential of 90F (i.e. -20F ambient),
the cost escalates to $33.30 per open door per hour. Several buildings owned by MOA
(including the New Transit Building next door) have automatic systems that open and
close the overhead doors when a vehicle or pedestrian is sensed outside or inside the
door. A less expensive, simpler retro-fittable solution can be achieved with a timer that
closes the door automatically after a few minutes and has a safety sensor similar to the
one in Appendix E to prevent inadvertent or unsafe door closings. It is estimated that
such a system would cost $1000 per door. It is further estimated that installing such a
system would result in a 50% reduction in air leakage, which translated to a $3,107
annual savings per the AKwarm-C model. The payback for this scenario is 3.2 years.
D-3: Building Shell Insulation: There are a number of wall sections of the TM building
that utilize bare 12” CMU’s with no insulation inside or outside. These sections total
over 7000 square feet. It is recommended to fur out inside these walls with 2x4 studs,
add 3” of rigid insulation and finish with gypsum. The estimated cost is $31,000 and
the AKwarm-C model’s calculated annual savings $6,887, resulting in a 4.6 year
payback.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 44 of 59
D-4: De-Stratification Fans: The high bay (23’ ceilings) areas of these combined
buildings are approximately 50% of the total square footage and consume
approximately 50% of the total heating costs, or $23,000/year. Typically in a 23’ high
bay space, a temperature differential between the ceiling and the thermostat will be
5F-10F. Installing appropriate de-strat fans in a high bay space with a 7.2F
temperature differential and a 23’ ceiling, per the graphs below, yields a 16% energy
savings. This results in an annual savings of $3,680. Estimated cost to install a de-
strat fan is $600 each; assuming 8 fans are appropriate (number, location and size of
fans must be determined by an engineer or fan vendor), total costs are $4800 and
payback is 1.3 years.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
D-5: Motor replacements: It is recommended that all motors, 3HP or larger, operating for
1500 hrs or longer at continuous speed, be replaced at EOL with premium efficiency motors.
Generally, the payback on replacing an operating motor with a premium efficiency motor of the
same size is longer than a typical motor life of 20 years, but this is heavily dependent on the
annual usage. The payback on replacing a burnt-out motor with a premium efficiency motor is
generally less than 10 years – again, depending on the usage. All motors in this building, 3HP
and larger, are listed below, along with recommendations for replacement at burn-out for the
cost effective instances. There are no instances in this building of cost effective motor
replacement prior to burn out.
Table 4
Motor use &
location (3 HP
or larger) HP/Volts/Ph
Existing
Efficiency
Premium
Efficiency
Estimated
annual
usage
(hrs)
Annual
Savings
Burn‐out
payback
(yrs)
Replacement
payback (yrs)
RECOMMENDED
Rupp furnace in
West Service
Bay 5/480/3 est 80% 88.50% 1500 $ 59.85 4.2 16.7
V‐5 West
Service bay
exhaust fan 5/480/3 est 84% 88.50% 1500 $ 30.18 8.3 33.1
NOT RECOMMENDED
V‐2 Vehicle
exhaust in main
vehicle bay 5/480/3 est 84% 88.50% 450 $ 9.05 27.6 110.5
West Service
Bay utility
compressor 3/115/1 est 82.5% 87.50% 500 $ 6.91 29 144
Landa Steam
Cleaner in
Wash Bay 6.2/230.3 87.5% 88.5% 1200 $ 5.15 48.5 194.5
V‐Max Wash
Machine dryer
blower motors 10/208/3 89.50% 90.20% 160 $ 0.92 325 1626
V‐Max Wash
Machine main
pumps 25/460/3 92.40% 92.40%
Premium
Efficiency
Elevator
hydraulic motor 20/460/3 est 92.5% 92.50%
Premium
Efficiency
AHU‐1 air
handler ‐ PTA
rooftop ‐ hot
side 5/460/3 est 88.5% 88.50%
Premium
efficiency
MAU‐1 on PTA
rooftop 3/460/3 est 87.5% 87.50%
Premium
Efficiency
Efficiency ratings at full load, per nameplate or estimated if not on nameplate or nameplate not accessible. Payback
figures based on power consumed at 66% load.
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
Appendix E - Duplex Head Bolt Heater Controls
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 47 of 59
Appendix E – Motion and presence-sensing overhead door safety controls
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 48 of 59
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 49 of 59
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 50 of 59
Appendix F – Benchmark Data
REAL Preliminary Benchmark Data Form
PART I – FACILITY INFORMATION
Facility Owner Facility Owned By Date (mm/dd/yyyy)
MOA Municipal
Government/Subdivision
12/29/11
Building Name/
Identifier
Building Usage Building Square Footage
(conbined)
Transit Maintenance
(old) & Paratransit
Admin Building
40,950
Building Type Community Population Year Built
261,500 1975
Facility Address Facility City Facility Zip
3601 Dr Martin Luther
King
Anchorage
99517
Transit Maintenance (old) & Paratransit Admin Building
Buiding Size Input (sf) = 40,950
2009 Natural Gas Consumption (Therms) 75,895.00
2009 Natural Gas Cost ($) 117,834
2009 Electric Consumption (kWh) 466,288
2009 Electric Cost ($) 60,666
2009 Oil Consumption (Therms) 0.00
2009 Oil Cost ($) 0
2009 Propane Consumption (Therms) 0.00
2009 Propane Cost ($) 0.00
2009 Coal Consumption (Therms) 0.00
2009 Coal Cost ($) 0.00
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 51 of 59
2009 Wood Consumption (Therms) 0.00
2009 Wood Cost ($) 0.00
2009 Thermal Consumption (Therms) 0.00
2009 Thermal Cost ($) 0.00
2009 Total Energy Use (kBtu) 9,180,941
2009 Total Energy Cost ($) 178,500
Annual Energy Use Intensity (EUI)
2009 Natural Gas (kBtu/sf) 185.3
2009 Electricity (kBtu/sf) 38.9
2009 Oil (kBtu/sf) 0.0
2009 Propane (kBtu/sf) 0.0
2009 Coal (kBtu/sf) 0.0
2009 Wood (kBtu/sf) 0.0
2009 Thermal (kBtu/sf) 0.0
2009 Energy Utilization Index (kBtu/sf) 224.2
Annual Energy Cost Index (ECI)
2009 Natural Gas Cost Index ($/sf) 2.88
2009 Electric Cost Index ($/sf) 1.48
2009 Oil Cost Index ($/sf) 0.00
2009 Propane Cost Index ($/sf) 0.00
2009 Coal Cost Index ($/sf) 0.00
2009 Wood Cost Index ($/sf) 0.00
2009 Thermal Cost Index ($/sf) 0.00
2009 Energy Cost Index ($/sf) 4.36
2010 Natural Gas Consumption (Therms) 53,287.00
2010 Natural Gas Cost ($) 45,906
2010 Electric Consumption (kWh) 453,730
2010 Electric Cost ($) 48,184
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 52 of 59
2010 Oil Consumption (Therms) 0.00
2010 Oil Cost ($) 0
2010 Propane Consumption (Therms) 0.00
2010 Propane Cost ($) 0
2010 Coal Consumption (Therms) 0.00
2010 Coal Cost ($) 0
2010 Wood Consumption (Therms) 0.00
2010 Wood Cost ($) 0
2010 Thermal Consumption (Therms) 0.00
2010 Thermal Cost ($) 0
2010 Total Energy Use (kBtu) 6,877,280
2010 Total Energy Cost ($) 94,090
Annual Energy Use Intensity (EUI)
2010 Natural Gas (kBtu/sf) 130.1
2010 Electricity (kBtu/sf) 37.8
2010 Oil (kBtu/sf) 0.0
2010 Propane (kBtu/sf) 0.0
2010 Coal (kBtu/sf) 0.0
2010 Wood (kBtu/sf)0.0
2010 Thermal (kBtu/sf) 0.0
2010 Energy Utilization Index (kBtu/sf) 167.9
Annual Energy Cost Index (ECI)
2010 Natural Gas Cost Index ($/sf) 1.12
2010 Electric Cost Index ($/sf) 1.18
2010 Oil Cost Index ($/sf) 0.00
2010 Propane Cost Index ($/sf) 0.00
2010 Coal Cost Index ($/sf) 0.00
2010 Wood Cost Index ($/sf) 0.00
2010 Thermal Cost Index ($/sf) 0.00
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING
PARATRANSIT ADMINISTRATION BUILDING
June 28, 2012 Page 53 of 59
20010 Energy Cost Index ($/sf) 2.30
Note:
1 kWh = 3,413 Btu's
1 Therm = 100,000 Btu's
1 CF ≈ 1,000 Btu's
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING Appendix F - Benchmark Tables and Graphs Natural Gas Btus/CCF =100,000 Provider Customer # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($) Enstar COMBINED Jan‐09 1/6/2009 2/5/2009 33 13009 13009 $13,103 $1.01 Enstar COMBINED Feb‐09 2/6/2009 3/5/2009 33 10788 10788 $10,876 $1.01 Enstar COMBINED Mar‐09 3/6/2009 4/2/2009 10 33222 33222 $21,792 $0.66 Enstar COMBINED Apr‐09 4/3/2009 5/7/2009 0 0 0 $19,188 Enstar COMBINED May‐09 5/8/2009 6/4/2009 0 0 0 $33,489 Enstar COMBINED Jun‐09 6/5/2009 7/6/2009 30 588 588 $654 $1.11 Enstar COMBINED Jul‐09 7/7/2009 8/6/2009 30 557 557 $624 $1.12 Enstar COMBINED Aug‐09 8/7/2009 9/4/2009 32 722 722 $789 $1.09 Enstar COMBINED Sep‐09 9/5/2009 10/6/2009 29 981 981 $1,049 $1.07 Enstar COMBINED Oct‐09 10/7/2009 11/5/2009 28 2201 2201 $2,272 $1.03 Enstar COMBINED Nov‐09 11/6/2009 12/3/2009 30 4705 4705 $4,784 $1.02 Enstar COMBINED Dec‐09 12/4/2009 1/7/2010 31 9122 9122 $9,214 $1.01 Enstar COMBINED Jan‐10 1/8/2010 2/4/2010 32 8832 8832 $7,371 $0.83 Enstar COMBINED Feb‐10 2/5/2010 3/4/2010 28 9055 9055 $7,555 $0.83 Enstar COMBINED Mar‐10 3/5/2010 4/8/2010 31 6340 6340 $5,309 $0.84
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 55 of 59 Enstar COMBINED Apr‐10 4/9/2010 5/6/2010 32 6021 6021 $5,094 $0.85 Enstar COMBINED May‐10 5/7/2010 6/3/2010 27 1952 1952 $1,698 $0.87 Enstar COMBINED Jun‐10 6/4/2010 7/8/2010 33 1142 1142 $1,022 $0.89 Enstar COMBINED Jul‐10 7/9/2010 8/5/2010 29 722 722 $672 $0.93 Enstar COMBINED Aug‐10 8/6/2010 9/2/2010 34 991 991 $1,154 $1.16 Enstar COMBINED Sep‐10 9/3/2010 10/7/2010 30 1015 1015 $1,173 $1.16 Enstar COMBINED Oct‐10 10/8/2010 11/4/2010 29 1867 1867 $1,855 $0.99 Enstar COMBINED Nov‐10 11/5/2010 12/2/2010 28 5605 5605 $4,845 $0.86 Enstar COMBINED Dec‐10 40515 40545 31 9745 9745 $8,158 $0.84 Jan ‐09 to Dec ‐09 total: 75,895 75,895 0 $117,834 $0 Jan ‐10 to Dec ‐10 total: 53,287 53,287 0 $45,906 $0 Jan ‐ 09 to Dec ‐ 09 avg: $1.01 Jan ‐ 10 to Dec ‐ 10 avg: $0.92 Electricity Btus/kWh =3,413 Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($) CEA COMBINED Jan‐09 0 0 0 41227 1407.07751 66 $6,123 $0.15 $732.60 CEA COMBINED Feb‐09 0 0 0 39292 1341.03596 65.2 $5,860 $0.15 $723.72 CEA COMBINED Mar‐09 0 0 0 39890 1361.4457 58.4 $5,785 $0.15 $648.24
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 56 of 59 CEA COMBINED Apr‐09 0 0 0 41857 1428.57941 60.4 $5,748 $0.14 $670.44 CEA COMBINED May‐09 0 0 0 38222 1304.51686 58.8 $5,332 $0.14 $652.68 CEA COMBINED Jun‐09 0 0 0 39121 1335.19973 57.6 $5,201 $0.13 $639.36 CEA COMBINED Jul‐09 0 0 0 40022 1365.95086 56.4 $4,804 $0.12 $626.04 CEA COMBINED Aug‐09 0 0 0 38599 1317.38387 58.8 $4,665 $0.12 $681.49 CEA COMBINED Sep‐09 0 0 0 37141 1267.62233 57.2 $4,417 $0.12 $662.95 CEA COMBINED Oct‐09 0 0 0 36702 1252.63926 58.4 $4,261 $0.12 $676.86 CEA COMBINED Nov‐09 0 0 0 36914 1259.87482 60 $4,274 $0.12 $695.40 CEA COMBINED Dec‐09 0 0 0 37301 1273.08313 61.6 $4,196 $0.11 $713.94 CEA COMBINED Jan‐10 0 0 0 8587 1316.97431 56 $4,055 $0.11 $649.04 CEA COMBINED Feb‐10 0 0 0 38516 1314.55108 56.4 $4,028 $0.10 $653.68 CEA COMBINED Mar‐10 0 0 0 36447 1243.93611 54.8 $3,898 $0.11 $635.13 CEA COMBINED Apr‐10 0 0 0 39399 1344.68787 56.4 $4,253 $0.11 $653.68 CEA COMBINED May‐10 0 0 0 36936 1260.62568 60.8 $4,055 $0.11 $704.67 CEA COMBINED Jun‐10 0 0 0 38108 1300.62604 62 $4,096 $0.11 $718.58 CEA COMBINED Jul‐10 0 0 0 38307 1307.41791 56 $4,052 $0.11 $649.04 CEA COMBINED Aug‐10 0 0 0 36827 1256.90551 59.2 $3,964 $0.11 $686.13
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 57 of 59 CEA COMBINED Sep‐10 0 0 0 37345 1274.58485 60 $3,927 $0.11 $687.00 CEA COMBINED Oct‐10 0 0 0 36453 1244.14089 58 $3,837 $0.11 $664.10 CEA COMBINED Nov‐10 0 0 0 39285 1340.79705 60.4 $4,067 $0.10 $691.58 CEA COMBINED Dec‐10 0 0 0 37520 1280.5576 74.4 $3,952 $0.11 $851.88 Jan ‐09 to Dec ‐09 total: 466288 15914.40944 718.8 $60,666 $8,124 Jan ‐10 to Dec ‐10 total: 453730 15485.8049 714.4 $48,184 $8,245 Jan ‐ 09 to Dec ‐ 09 avg: $0.13 Jan ‐ 10 to Dec ‐ 10 avg: $0.11
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 58 of 59 $0$5,000$10,000$15,000$20,000$25,000$30,000$35,000$40,00005000100001500020000250003000035000Jan‐09Mar‐09May‐09Jul‐09Sep‐09Nov‐09Jan‐10Mar‐10May‐10Jul‐10Sep‐10Nov‐10Natural Gas Cost ($)Natural Gas Consumption (Therms)Date (Mon ‐Yr)Transit Maintenance (old) ‐Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural GasConsumption (Therms)Natural Gas Cost ($)
ENERGY AUDITS OF ALASKA OLD TRANSIT MAINTENANCE BUILDING PARATRANSIT ADMINISTRATION BUILDING June 28, 2012 Page 59 of 59 $0$1,000$2,000$3,000$4,000$5,000$6,000$7,0003300034000350003600037000380003900040000410004200043000Jan‐09Mar‐09May‐09Jul‐09Sep‐09Nov‐09Jan‐10Mar‐10May‐10Jul‐10Sep‐10Nov‐10Electric Cost ($)Electric Consumption (kWh)Date (Mon ‐Yr)Transit Maintenance (old) ‐Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)