HomeMy WebLinkAboutGAL GILA Iditarod Hall 2012-EEManaging Office
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Fairbanks, Alaska 99709 Anchorage, Alaska 99517 Juneau, Alaska 99801
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ENERGY AUDIT – FINAL REPORT
GILA IDITAROD HALL
Galena, Alaska
Prepared for:
Mr. Chris Reitan
PO Box 266
Galena, Alaska
Prepared by:
David C. Lanning PE, CEA
Steven Billa EIT, CEAIT
July 17, 2012
Acknowledgment: “This material is based upon work supported by the Department of
Energy under Award Number DE-EE0000095”
ENVIRONMENTAL ENGINEERING, HEALTH & SAFETY
Anch: 3105 Lakeshore Dr. Ste 106A, 99517 907.222.2445 Fax: 222.0915
Fairbanks: 2400 College Road, 99709 907.452.5688 Fax: 452.5694
Juneau: 4402 Thane Road, 99801 907.586.6813 Fax: 586.6819
info@nortechengr.com www.nortechengr.com
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TABLE OF CONTENTS
1.0 EXECUTIVE SUMMARY .................................................................................................. 1
2.0 INTRODUCTION ............................................................................................................... 4
2.1 Building Use .......................................................................................................... 4
2.2 Building Occupancy and Schedules ...................................................................... 4
2.3 Building Description ............................................................................................... 4
3.0 BENCHMARKING 2010 UTILITY DATA .......................................................................... 6
3.1 Total Energy Use and Cost of 2010 ...................................................................... 7
3.2 Energy Utilization Index of 2010 ............................................................................ 8
3.3 Cost Utilization Index of 2010 ................................................................................ 9
3.4 Seasonal Energy Use Patterns ........................................................................... 11
3.5 Future Energy Monitoring .................................................................................... 12
4.0 MODELING ENERGY CONSUMPTION ......................................................................... 13
4.1 Understanding How AkWarm Models Energy Consumption ............................... 14
4.2 AkWarm Calculated Savings for GILA Iditarod Hall ............................................ 15
4.3 Additional Modeling Methods .............................................................................. 16
5.0 BUILDING OPERATION AND MAINTENANCE (O & M) .............................................. 17
5.1 Operations and Maintenance .............................................................................. 17
5.2 Commissioning .................................................................................................... 17
5.3 Building Specific Recommendations ................................................................... 17
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Galena, Alaska
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APPENDICES
Appendix A Recommended Energy Efficiency Measures ........................................... 19
Appendix B Energy Efficiency Measures that are NOT Recommended ..................... 29
Appendix C Significant Equipment List ....................................................................... 30
Appendix D Local Utility Rate Structure ...................................................................... 31
Appendix E Analysis Methodology .............................................................................. 32
Appendix F Audit Limitations ...................................................................................... 33
Appendix G References .............................................................................................. 34
Appendix H Typical Energy Use and Cost – Fairbanks and Anchorage ..................... 35
Appendix I Typical Energy Use and Cost – Continental U.S. .................................... 36
Appendix J List of Conversion Factors and Energy Units .......................................... 37
Appendix K List of Acronyms, Abbreviations, and Definitions .................................... 38
Appendix L Building Floor Plan .................................................................................. 39
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Galena, Alaska
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1.0 EXECUTIVE SUMMARY
NORTECH has completed an ASHRAE Level II Energy Audit of the Galena Interior Learning
Academy (GILA) Iditarod Hall, a 35,579 square foot facility. The audit began with benchmarking
which resulted in a calculation of the energy consumption per square foot. A site inspection was
completed on January 12, 2012 to obtain information about the lighting, heating, ventilation,
cooling and other building energy uses. The existing usage data and current systems were then
used to develop a building energy consumption model using AkWarm.
Once the model was calibrated, a number of Energy Efficiency Measures (EEMs) were
developed from review of the data and observations. EEMs were evaluated and ranked on the
basis of both energy savings and cost using a Savings/Investment Ratio (SIR). While these
modeling techniques were successful in verifying that many of the EEMs would save energy,
not all of the identified EEMs were considered cost effective based on the hardware, installation,
and energy costs at the time of this audit.
While the need for a major retrofit can typically be identified by an energy audit, upgrading
specific systems often requires collecting additional data and engineering and design efforts that
are beyond the scope of the Level II energy audit. The necessity and amount of design effort
and cost will vary depending on the scope of the specific EEMs planned and the sophistication
and capability of the entire design team, including the building owners and operators. During
the budgeting process for any major retrofit identified in this report, the building owner should
add administrative and supplemental design costs to cover the individual needs of their own
organization and the overall retrofit project.
The following table, from AkWarm, is a summary of the recommended EEMs for the GILA
Iditarod Hall. Additional discussion of the modeling process can be found in Section 3. Details
of each individual EEM can be found in Appendix A of this report. A summary of EEMs that
were evaluated but are not currently recommended is located in Appendix B.
PRIORITY LIST – ENERGY EFFICIENCY MEASURES (EEMs)
Rank Feature/
Location Improvement Description
Estimated
Annual
Energy
Savings
Estimated
Installed
Cost
Savings to
Investment
Ratio, SIR
Simple
Payback
(Years)
1 Ventilation
Fix Q·dot heat exchanger to
utilize heat recovery, Install
Variable Speed Drive and
Variable Speed Motors for SA-
1/EF-1. Install demand
sensors (CO2 sensors in
return duct and temperature
override control).
$41,141 $21,700 23 0.5
2
Other Electrical:
Head Bolt
Heaters
Add new Clock Timer or Other
Scheduling Control $751 $500 18 0.7
3 Lighting: Incan
Exit
Replace with 12 LED (2) 4W
Module StdElectronic $2,439 $1,638 12 0.7
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PRIORITY LIST – ENERGY EFFICIENCY MEASURES (EEMs)
Rank Feature/
Location Improvement Description
Estimated
Annual
Energy
Savings
Estimated
Installed
Cost
Savings to
Investment
Ratio, SIR
Simple
Payback
(Years)
4 Lighting: Entire
School
Replace with FLUOR T8 4'
F32T8 25W Energy-Saver
Instant HighLight
HighEfficElectronic and
Various Size CFLs
$8,996 $5,480 11 0.6
5 HVAC And DHW
replace hot water circulation
pump with Grundfos Alpha or
equivalent
$736 $1,000 11 1.4
6 Lighting: North
Stairwell
Replace with FLUOR (2) T8
F32T8 32W U-Tube Standard
Instant HighEfficElectronic
$102 $60 10 0.6
7 Lighting: Exterior
Wall Packs
Replace with 3 LED 23W
Module StdElectronic $461 $715 4.0 1.6
8 Lighting: Exterior
Wall Packs
Replace with 6 LED 27W
Module StdElectronic $1,379 $3,145 2.7 2.3
9 Exterior Door:
Metal Full Lite
Remove existing door and
install standard pre-hung U-
0.16 insulated door, including
hardware.
$98 $1,038 2.0 10
TOTAL, cost-effective measures $56,105 $35,276 17.44 0.6
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Modeled Building Energy Cost Breakdown
The above charts are a graphical representation of the modeled energy usage for GILA Iditarod
Hall. The greatest portion of energy cost for the building is in Envelope Air losses, Lighting, and
Fans. This indicates that the greatest savings can be found in reducing the amount of outside
air provided to the building mechanically or through air leakage and upgrading lighting. Detailed
improvements for ventilation and lighting and other cost effective measures can be found in
Appendix A.
The chart breaks down energy usage by cost into the following categories:
Envelope Air Losses—the cost to provide heated fresh air to occupants, air leakage, heat lost in
air through the chimneys and exhaust fans, heat lost to wind and other similar losses.
Envelope
o Ceiling—quantified heat loss transferred through the ceiling portion of the envelope.
o Window—quantified heat loss through the window portion of the envelope.
o Wall/Door—quantified heat loss through the wall and door portions of the envelope.
o Floor—quantified heat loss through the floor portion of the envelope.
Water Heating—energy cost to provide domestic hot water.
Fans—energy cost to run ventilation, and exhaust fans.
Lighting—energy cost to light the building.
Refrigeration—energy costs to provide refrigerated goods for the occupants.
Other Electrical—includes energy costs not listed above including cooking loads, laundry loads,
other plug loads and electronics.
The energy cost by end use breakdown was provided by AkWarm based on the field inspection
and does not indicate that all individual fixtures and appliances were directly measured. The
current energy costs are shown above on the left hand pie graph and the projected energy
costs, assuming use of the recommended EEMs, are shown on the right.
Envelope
Air Losses
$71,357
51%
Ceiling
$3,888
3%
Window
$3,659
3%
Wall/Door
$10,978
8%
Floor
$3,659
3%
Water
Heating
$1,994
1%
Fans
$12,079
9%
Lighting
$23,725
17%
Refriger-
ation
$574
0%
Other
Electrical
$3,508
2%
Cooking
$438
0%
Clothes
Drying
$4,792
3%
Existing Building Energy Cost
Breakdown $ 140,652
Envelope
Air Losses
$30,747
22%
Ceiling
$4,589
3%
Window
$4,130
3%
Wall/Door
$12,391
9%Floor
$4,130
3%
Water
Heating
$1,234
1%
Fans
$9,670
7%
Lighting
$9,095
7%
Refriger-
ation
$574
0%
Other
Electrical
$2,757
2%
Cooking
$438
0%
Clothes
Drying
$4,792
3%
Savings
$56,106
40%
Retrofit Building Energy Cost
Breakdown $84,547
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2.0 INTRODUCTION
NORTECH contracted with the Alaska Housing Finance Corporation to perform ASHRAE
Level II Energy Audits for publically owned buildings in Alaska. This report presents the findings
of the utility benchmarking, modeling analysis, and the recommended building modifications,
and building use changes that are expected to save energy and money.
The report is organized into sections covering:
description of the facility,
the building’s historic energy usage (benchmarking),
estimating energy use through energy use modeling,
evaluation of potential energy efficiency or efficiency improvements, and
recommendations for energy efficiency with estimates of the costs and savings.
2.1 Building Use
Galena Interior Learning Academy (GILA) is a regional boarding school. GILA Iditarod Hall is
used as the adult dormitory for the GILA campus. The building includes several assembly and
public use areas such as a lounge room, two laundry rooms and an exercise room.
2.2 Building Occupancy and Schedules
The building is normally only occupied during the school year, which is from the beginning of
August to the end of May. Reported average occupancy in this building is around 10 people at
any given time.
2.3 Building Description
GILA Iditarod Hall is a wood framed three-story building with a basement constructed in 1987.
The rooms have two general configurations, suites on one wing and standard rooms on the
other wing.
Building Envelope
Building Envelope: Walls
Wall Type Description Insulation Notes
Above-grade walls Wood-framed with 2x4 studs
spaced 16-inches on center. R-13 fiberglass batt. No signs of insulation
damage.
Lower basement walls 10” concrete blocks (CMU)
Exterior layer of 2.5-
inch Expanded
Polystyrene (EPS).
-
Building Envelope: Floors
Floor Type Description Insulation Notes
Basement Floor Insulated slab 4.5-inches of rigid
insulation -
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Heating and Ventilation Systems
The heat in this building is provided by a District Steam utility company. Heat is transferred
through a shell and tube heat exchanger to the building hydronic system and is then distributed
to:
Fin-tube radiators in rooms
Heat coils in Air Handling Units (AHUs)
Unit heaters
There is one AHU in the building which provides ventilation and heat to the rooms and
surrounding areas. A two phase Q·dot heat exchanger is incorporated in this AHU since it uses
100% outside air.
Air Conditioning System
No air conditioning system is installed in this building.
Energy Management
There is no form of energy management system installed in this building.
Building Envelope: Roof
Roof Type Description Insulation Notes
All Roofs Hot roof framed with wood
trusses. R-30 fiberglass batt -
Building Envelope: Doors and Windows
Door and Window
Type Description Estimated
R-Value Notes
Door Type 1 Metal: Flush 2.7 83 total square feet
Door Type 2 Metal: Half Light 1.7 41 total square feet
Window Type 1 Wood: Triple Pane:
<3/8” spacing 2.3 1785 total square feet
Window Type 2 Aluminum: Triple Pane:
<3/8” spacing 1.4 18 total square feet
Window Type 3 Wood: Triple Pane:
>3/8” spacing 2.6 26 total square feet
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Lighting Systems
Primary lighting in the rooms consists of incandescent ceiling mounted and task style fixtures,
while lighting in the hallways consists of ceiling mounted fixtures with T12 lamps (1.5-inch
diameter, 4-foot long).
Domestic Hot Water
Domestic hot water is provided by an indirect hot water heater with a 450 gallon storage
capacity. The water recirculates so that hot water is readily available.
3.0 BENCHMARKING 2010 UTILITY DATA
Benchmarking building energy use consists of obtaining and then analyzing two years of energy
bills. The original utility bills are necessary to determine the raw usage, and charges as well as
to evaluate the utility’s rate structure. The metered usage of electrical and natural gas
consumption is measured monthly, but heating oil, propane, wood, and other energy sources
are normally billed upon delivery and provide similar information. During benchmarking,
information is compiled in a way that standardizes the units of energy and creates energy use
and billing rate information statistics for the building on a square foot basis. The objectives of
benchmarking are:
to understand patterns of use,
to understand building operational characteristics,
for comparison with other similar facilities in Alaska and across the country, and
to offer insight in to potential energy savings.
The results of the benchmarking, including the energy use statistics and comparisons to other
areas, are discussed in the following sections.
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3.1 Total Energy Use and Cost of 2010
The energy use profiles below show the energy and cost breakdowns for the GILA Iditarod
Building. The total annual energy use for the building is 3,179 mmBTUs at a cost of $ 54,735.
These charts show the portion of use for a fuel type and the portion of its cost.
The above charts indicate that the highest portion of energy use and cost is for Steam. Steam
consumption correlates directly to space heating and domestic hot water while electrical use
can correlate to lighting systems, plug loads, and HVAC equipment. The fuel type with the
highest cost often provides the most opportunity for savings.
The energy use for Electricity is based on utility information provided by GILA. Although energy
use from Electric shows to be low, it may not be correct because of an apparent malfunctioning
electric meter. The amount of Electric energy use is estimated to be much greater than the
utility data shows. See table in Section 3.3.
Electric
186
6%
Steam
2993
94%
Energy Use Total (mmBTUs)
in 2010
Electric
Cost
$18,564
34%
Steam
Cost
$36,171
66%
Energy Cost Total ($)
in 2010
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3.2 Energy Utilization Index of 2010
The primary benchmarking statistic is the Energy Utilization Index (EUI). The EUI is calculated
from the utility bills and provides a simple snapshot of the quantity of energy actually used by
the building on a square foot and annual basis. The calculation converts the total energy use
for the year from all sources in the building, such as heating fuel and electrical usage, into
British Thermal Units (BTUs). This total annual usage is then divided by the number of square
feet of the building. The EUI units are BTUs per square foot per year.
The benchmark analysis of utility bills found that the GILA Iditarod Hall has an EUI of 89,000
BTUs per square foot in 2010. The AkWarm model for EUI of 102,000 BTUs per square foot
per year is an estimated use of electricity in GILA Iditarod Hall and can be used to compare
actual energy use currently metered.
The EUI is useful in comparing this building’s energy use to that of other similar buildings in
Alaska and in the Continental United States. The EUI can be compared to average energy use
in 2003 found in a study by the U.S. Energy Information Administration of commercial buildings
(abbreviated CBECS, 2006). That report found an overall average energy use of about 90,000
BTUs per square foot per year while studying about 6,000 commercial buildings of all sizes,
types, and uses that were located all over the Continental U.S. (see Table C3 in Appendix I).
In a recent and unpublished state-wide benchmarking study sponsored by the Alaska Housing
Finance Corporation, schools in Fairbanks averaged 62,000 BTUs per square foot and schools
in Anchorage averaged 123,000 BTUs per square foot annual energy use. The chart below
shows the GILA Iditarod Hall relative to these values. These findings are discussed further in
Appendix H.
89,000
102,000
62,000
123,000
0
20000
40000
60000
80000
100000
120000
140000
Btu/ Sq. FtAnnual Energy Utilization Index for 2010 (Total Energy/ SF)
GILA Iditarod AkWarm Model Fairbanks Schools Anchorage Schools
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3.3 Cost Utilization Index of 2010
Another benchmarking statistic that is useful is the Cost Utilization Index (CUI), which is the cost
for energy used in the building on a square foot basis per year. The CUI is calculated from the
cost for utilities for a year period. The CUI permits comparison of buildings on total energy cost
even though they may be located in areas with differing energy costs and differing heating
and/or cooling climates. The cost of energy, including heating oil, natural gas, and electricity,
can vary greatly over time and geographic location and can be higher in Alaska than other parts
of the country.
The CUI for GILA Iditarod Hall is about $1.54/SF. This is based on utility costs from 2010 and
the following rates:
Electricity at $ 0.34 / kWh ($ 9.96 / Therm)
Steam at $ 12.26 / thousand pounds ($ 1.23 / Therm)
Compare #1 Fuel Oil at $ 5.43 / gallon ($ 4.11 / Therm)
If GILA Iditarod Hall has to switch from the cheaper Steam to #1 fuel oil, the CUI would be much
higher.
Due to the already increased price of electricity ($0.56/kWh):
the CUI for 2012 will be higher than 2010 and will be greater than $1.54/SF.
the recommended EEM’s, and the savings associated with them, are based on the
current price of electricity of $0.56/kWh.
The CUI from 2010 utility data is low due to a malfunctioning electricity meter. 2010 modeled
used is estimated using the AkWarm model and a 2012 projected price is estimated using the
new electricity rate.
Electric
KWH
Electric
Rate
Electric
mmBTU Electric Cost Total
Building EUI
Total
Building CUI
2010 Metered Use 54,600 $0.34 186 $18,564 89,000 $1.54 /SF
2010 Modeled Use 187,388 $0.34 640 $63,712 102,000 $2.81 /SF
2012 Estimated Use 187,388 $0.56 640 $105,556 102,000 $3.98 /SF
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The Department of Energy Administration study, mentioned in the previous section (CBECS,
2006) found an average cost of $2.52 per square foot in 2003 for 4,400 buildings in the
Continental U.S (Tables C4 and C13 of CBDES, 2006). Schools in Fairbanks have an average
cost for energy of $2.42 per square foot while Anchorage schools average $2.11 per square
foot. The chart below shows the GILA Iditarod Hall relative to these values. More details are
included in Appendix H.
An AkWarm estimated CUI of $2.81/SF (at $0.34/kWh) is included in the CUI graph to compare
what an actual cost per square foot could be if electricity were metered correctly.
$1.54
$2.81
$2.42
$2.11
$0.00
$0.50
$1.00
$1.50
$2.00
$2.50
$3.00
Annual Energy Cost Utilization Index (Total Cost/ SF)
GILA Iditarod AkWarm Model Fairbanks Schools Anchorage Schools
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3.4 Seasonal Energy Use Patterns
Energy consumption is often highly correlated with seasonal climate and usage variations. The
graphs below show the electric and fuel consumption of this building over the course of two
years. The lowest monthly use is called the baseline use. The electric baseline often reflects
year round lighting consumption while the heating fuel baseline often reflects year round hot
water usage. The clear relation of usage of steam during periods of cold weather can be seen
in the months with higher usage. The electric consumption is not relative to actual building use
as there was a malfunctioning electric meter on the building.
0
5000
10000
15000
20000
25000
Oct-09Dec-09Feb-10Apr-10Jun-10Aug-10Oct-10Dec-10Feb-11Apr-11Jun-11KWHElectrical Consumption
GILA Iditarod Hall
0
1,000
2,000
3,000
4,000
5,000
6,000
7,000
8,000
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
Oct-09Dec-09Feb-10Apr-10Jun-10Aug-10Oct-10Dec-10Feb-11Apr-11Jun-11ThermsPounds of SteamSteam Consumption
GILA Iditarod Hall
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3.5 Future Energy Monitoring
Energy accounting is the process of tracking energy consumption and costs. It is important for
the building owner or manager to monitor and record both the energy usage and cost each
month. Comparing trends over time can assist in pinpointing major sources of energy usage and
aid in finding effective energy efficiency measures. There are two basic methods of energy
accounting: manual and automatic. Manual tracking of energy usage may already be performed
by an administrative assistant, however if the records are not scrutinized for energy use, then
the data is merely a financial accounting. Digital energy tracking systems, such as Smart Meters
for commercial or TED for residential, can be installed. They display and record real-time energy
usage and accumulated energy use and cost. There are several other types including OptoEMU
by Opto22 which has all of the information accessible via Ethernet browser.
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4.0 MODELING ENERGY CONSUMPTION
After benchmarking of a building is complete and the site visit has identified the specific systems
in the building, a number of different methods are available for quantifying the overall energy
consumption and to model the energy use. These range from relatively simple spreadsheets to
commercially available modeling software capable of handling complex building systems.
NORTECH has used several of these programs and uses the worksheets and software that
best matches the complexity of the building and specific energy use that is being evaluated.
Modeling of an energy efficiency measure (EEM) requires an estimate of the current energy
used by the specific feature, the estimated energy use of the proposed EEM and its installed
cost. EEMs can range from a single simple upgrade, such as light bulb type or type of motor, to
reprogramming of the controls on more complex systems. While the need for a major retrofit
can typically be identified by an energy audit, the specific system upgrades often require
collecting additional data and engineering and design efforts that are beyond the scope of the
Level II energy audit.
Based on the field inspection results and discussions with the building owners/operators,
auditors developed potential EEMs for the facility. Common EEMs that could apply to almost
every older building include:
Reduce the envelope heat losses through:
o increased building insulation, and
o better windows and doors
Reduce temperature difference between inside and outside using setback thermostats
Upgrade inefficient:
o lights,
o motors,
o refrigeration units, and
o other appliances
Reduce running time of lights/appliances through:
o motion sensors,
o on/off timers,
o light sensors, and
o other automatic/programmable systems
The objective of the following sections is to describe how the overall energy use of the building
was modeled and the potential for energy savings. The specific EEMs that provide these overall
energy savings are detailed in Appendix A of this report. While the energy savings of an EEM is
unlikely to change significantly over time, the cost savings of an EEM is highly dependent on the
current energy price and can vary significantly over time. An EEM that is not currently
recommended based on price may be more attractive at a later date or with higher energy
prices.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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4.1 Understanding How AkWarm Models Energy Consumption
NORTECH used the AkWarm model for evaluating the overall energy consumption at GILA
Iditarod Hall. The AkWarm program was developed by the Alaska Housing Finance Corporation
(AHFC) to model residential energy use. The original AkWarm is the modeling engine behind
the successful residential energy upgrade program that AHFC has operated for a number of
years. In the past few years, AHFC has developed a version of this model for commercial
buildings.
Energy use in buildings is modeled by calculating energy losses and consumption, such as:
• Heat lost through the building envelope components, including windows, doors,
walls, ceilings, crawlspaces, and foundations. These heat losses are computed for
each component based on the area, heat resistance (R-value), and the difference
between the inside temperature and the outside temperature. AkWarm has a library
of temperature profiles for villages and cities in Alaska.
• Window orientation, such as the fact that south facing windows can add heat in the
winter but north-facing windows do not.
• Inefficiencies of the heating system, including the imperfect conversion of fuel oil or
natural gas due to heat loss in exhaust gases, incomplete combustion, excess air,
etc. Some electricity is also consumed in moving the heat around a building through
pumping.
• Inefficiencies of the cooling system, if one exists, due to various imperfections in a
mechanical system and the required energy to move the heat around.
• Lighting requirements and inefficiencies in the conversion of electricity to light;
ultimately all of the power used for lighting is converted to heat. While the heat may
be useful in the winter, it often isn’t useful in the summer when cooling may be
required to remove the excess heat. Lights are modeled by wattage and operational
hours.
• Use and inefficiencies in refrigeration, compressor cooling, and heat pumps. Some
units are more efficient than others. Electricity is required to move the heat from
inside a compartment to outside it. Again, this is a function of the R-Value and the
temperature difference between the inside and outside of the unit.
• Plug loads such as computers, printers, mini-fridges, microwaves, portable heaters,
monitors, etc. These can be a significant part of the overall electricity consumption
of the building, as well as contributing to heat production.
• The schedule of operation for lights, plug loads, motors, etc is a critical component of
how much energy is used.
AkWarm adds up these heat losses and the internal heat gains based on individual unit usage
schedules. These estimated heat and electrical usages are compared to actual use on both a
yearly and seasonal basis. If the AkWarm model is within 5 % to 10% of the most recent 12
months usage identified during benchmarking, the model is considered accurate enough to
make predictions of energy savings for possible EEMs.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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4.2 AkWarm Calculated Savings for GILA Iditarod Hall
Based on the field inspection results and discussions with the building owners/operators,
auditors developed potential EEMs for the facility. These EEMs are then entered into AkWarm
to determine if the EEM saves energy and is cost effective (i.e. will pay for itself). AkWarm
calculates the energy and money saved by each EEM and calculates the length of time for the
savings in reduced energy consumption to pay for the installation of the EEM. AkWarm makes
recommendations based on the Savings/Investment Ratio (SIR), which is defined as ratio of the
savings generated over the life of the EEM divided by the installed cost. Higher SIR values are
better and any SIR above one is considered acceptable. If the SIR of an EEM is below one, the
energy savings will not pay for the cost of the EEM and the EEM is not recommended.
Preferred EEMs are listed by AkWarm in order of the highest SIR.
A summary of the savings from the recommended EEMs are listed in this table.
Description
Space
Heating
(2)(4)
Water
Heating
(4)
Lighting
(2)
Refriger-
ation
Other
Electrical
(2)
Cooking Clothes
Drying
Ventilation
Fans (2) Total
(3) Existing
Building $93,542 $1,994 $23,725 $574 $3,508 $438 $4,792 $12,079 $140,652
With All
Proposed
Retrofits
$55,987 $1,234 $9,095 $574 $2,757 $438 $4,792 $9,670 $84,547
(1) Savings $37,554 $760 $14,630 $0 $751 $0 $0 $2,409 $56,105
1) Savings in these categories do not reflect interaction with other categories. So, for
example, the savings in lighting does not affect the added space heating cost to make
up for the heat saved in replacing less-efficient lights with more-efficient lights that waste
less heat.
2) Energy in this column can be saved by installing the itemized EEMs but the actual dollar
amount of savings is based on 2012 price of electricity and actual full use electricity
being billed.
3) It is estimated that 187,388 kWh is consumed in this building, which equates to
$104,397 in the estimated 2012 model.
4) Space heating savings is estimated as 1,400 thousand pounds of steam if all EEMs are
implemented, an equivalent of $17,640 in savings.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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4.3 Additional Modeling Methods
The AkWarm program effectively models wood-framed and other buildings with standard
heating systems and relatively simple HVAC systems. AkWarm models of more complicated
mechanical systems are sometimes poor due to a number of simplifying assumptions and
limited input of some variables. Furthermore, AKWarm is unable to model complex HVAC
systems such as variable frequency motors, variable air volume (VAV) systems, those with
significant digital or pneumatic controls or significant heat recovery capacity. In addition, some
other building methods and occupancies are outside AkWarm capabilities.
This report section is included in order to identify benefits from modifications to those more
complex systems or changes in occupant behavior that cannot be addressed in AkWarm.
GILA Iditarod Hall could be modeled well in AKWarm. Retrofits for the HVAC system were
adequately modeled in AkWarm and did not require additional calculations.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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5.0 BUILDING OPERATION AND MAINTENANCE (O & M)
5.1 Operations and Maintenance
A well-implemented operation and maintenance (O & M) plan is often the driving force behind
energy savings. Such a plan includes preserving institutional knowledge, directing preventative
maintenance, and scheduling regular inspections of each piece of HVAC equipment within the
building. Routine maintenance includes the timely replacement of filters, belts and pulleys, the
proper greasing of bearings and other details such as topping off the glycol tanks. Additional
benefits to a maintenance plan are decreased down time for malfunctioning equipment, early
indications of problems, prevention of exacerbated maintenance issues, and early detection of
overloading/overheating issues. A good maintenance person knows the building’s equipment
well enough to spot and repair minor malfunctions before they become major retrofits.
Operations and Maintenance staff implementing a properly designed O & M plan will:
Track and document
o Renovations and repairs,
o Utility bills and fuel consumption, and
o System performance.
Keep available for reference
o A current Building Operating Plan including an inventory of installed systems,
o The most recent available as-built drawings,
o Reference manuals for all installed parts and systems, and
o An up-to-date inventory of on-hand replacement parts.
Provide training and continuing education for maintenance personnel.
Plan for commissioning and re-commissioning at appropriate intervals.
5.2 Commissioning
Commissioning of a building is the verification that the HVAC systems perform within the design
or usage ranges of the Building Operating Plan. This process ideally, though seldom, occurs as
the last phase in construction. HVAC system operation parameters degrade from ideal over time
due to incorrect maintenance, improper replacement pumps, changes in facility tenants or
usage, changes in schedules, and changes in energy costs or loads. Ideally, re-commissioning
of a building should occur every five to ten years. This ensures that the HVAC system meets
the potentially variable use with the most efficient means.
5.3 Building Specific Recommendations
During the visit, the Q·Dot heat exchanger in the Air Handler was not operating properly.
Depending on the orientation of the Q·Dot, it can either heat or cool incoming outside air.
During the visit, the Q·Dot’s actuator was broken and was stuck in cooling mode, thus actually
cooling outside air before reheating it. If it was oriented correctly it would recover heat from
exhaust air. This Q·Dot can be very effective in both recovering exhaust heat and in
economizer cooling but should be consistently monitored to make sure it is working correctly.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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APPENDICES
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Appendix A Recommended Energy Efficiency Measures
A number of Energy Efficiency Measures (EEMs) are available to reduce the energy use and
overall operating cost for the facility. The EEMs listed below are those recommended by
AkWarm based on the calculated savings/investment ration (SIR) as described in Appendix E.
AkWarm also provides a breakeven cost, which is the maximum initial cost of the EEM that will
still return a SIR of one or greater.
This section describes each recommended EEM and identifies the potential energy savings and
installation costs. This also details the calculation of breakeven costs, simple payback, and the
SIR for each recommendation. The recommended EEMs are grouped together generally by the
overall end use that will be impacted.
A.1 Temperature Control
There are no recommendations in this section because the thermostats are already manually
set back in this building during unoccupied times.
A.2 Electrical Loads
A.2.1 Lighting
The electricity used by lighting eventually ends up as heat in the building. In areas where
electricity is more expensive than other forms of energy, or in areas where the summer
temperatures require cooling; this additional heat can be both wasteful and costly. Converting
to more efficient lighting reduces cooling loads in the summer and allows the user to control
heat input in the winter. The conversion from T12 (one and a half inch fluorescent bulbs) to T8
(one inch), T5 (5/8 inch), Compact Fluorescent Lights (CFL), or LED bulbs provides a significant
increase in efficiency. LED bulbs can be directly placed in existing fixtures. The LED bulb
bypasses the ballast altogether, which removes the often irritating, “buzzing” noise that
magnetic ballasts tend to make.
Incandescent exit lighting is very inefficient and is typically retrofitted with LED style exit lights.
Rank Location Existing Condition Recommendation
3 Incan Exit 12 INCAN (2) A Lamp, Std 25W with
Manual Switching
Replace with 12 LED (2) 4W
Module StdElectronic
Installation Cost $1,638 Estimated Life of Measure (yrs) 10 Energy Savings (/yr) $2,439
Breakeven Cost $20,437 Savings-to-Investment Ratio 13 Simple Payback yrs 1
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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The primary room lighting in GILA Iditarod Hall is ceiling mounted and task style fixtures with
incandescent lamps. Incandescent lighting is the most inefficient type of lighting and should be
replaced. In AkWarm modeling, only the 1st floor of Iditarod Hall was retrofitted as it represents
the highest usage of rooms in the building. Primary hallway lighting in the building is ceiling
mounted fixtures with T12 lamps. These lamps should be replaced with more efficient T8 lamps
which will produce similar levels of lighting at a much lower energy use.
Rank Location Existing Condition Recommendation
4 120-131 12 INCAN (4) A Lamp, Std 60W with
Manual Switching
Replace with 12 FLUOR (4)
CFL, Spiral 13 W
Installation Cost $164 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $1,733
Breakeven Cost $10,689 Savings-to-Investment Ratio 65 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 120-131, 12 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 12 FLUOR CFL,
Spiral 13 W
Installation Cost $88 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $433
Breakeven Cost $2,672 Savings-to-Investment Ratio 30 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 139 3 INCAN (4) A Lamp, Std 60W with Manual
Switching
Replace with 3 FLUOR (4) CFL,
Spiral 13 W
Installation Cost $41 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $183
Breakeven Cost $1,132 Savings-to-Investment Ratio 28 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 TV Lounge INCAN A Lamp, Std 150W with Manual
Switching
Replace with FLUOR CFL,
Spiral 23 W
Installation Cost $10 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $41
Breakeven Cost $251 Savings-to-Investment Ratio 25 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 EW, NW Hall, North
Stairwell
14 FLUOR (2) T12 4' F40T12 40W
Standard Magnetic with Manual Switching
Replace with 14 FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $700 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $2,804
Breakeven Cost $17,358 Savings-to-Investment Ratio 25 Simple Payback yrs 0
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Rank Location Existing Condition Recommendation
4 North Stairwell, East
Stairwell
7 FLUOR (2) T12 4' F40T12 40W Standard
Magnetic with Manual Switching
Replace with 7 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $350 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $1,174
Breakeven Cost $7,239 Savings-to-Investment Ratio 21 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 North Stairwell, East
Stairwell
7 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 7 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $350 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $952
Breakeven Cost $5,895 Savings-to-Investment Ratio 17 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 120-131 12 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 12 FLUOR CFL,
Spiral 13 W
Installation Cost $88 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $217
Breakeven Cost $1,337 Savings-to-Investment Ratio 15 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 120-131 12 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 12 FLUOR CFL,
Spiral 13 W
Installation Cost $88 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $217
Breakeven Cost $1,337 Savings-to-Investment Ratio 15 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 139 INCAN A Lamp, Std 60W with Manual
Switching
Replace with FLUOR CFL,
Spiral 13 W
Installation Cost $7 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $15
Breakeven Cost $95 Savings-to-Investment Ratio 13 Simple Payback yrs 0
Rank Location Existing Condition Recommendation
4 RR209 INCAN (2) A Lamp, Std 60W with Manual
Switching
Replace with FLUOR (2) CFL,
Spiral 13 W
Installation Cost $10 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $14
Breakeven Cost $88 Savings-to-Investment Ratio 9.3 Simple Payback yrs 1
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Rank Location Existing Condition Recommendation
4 Main Arctic Entrance FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighLight
HighEfficElectronic
Installation Cost $50 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $71
Breakeven Cost $435 Savings-to-Investment Ratio 8.7 Simple Payback yrs 1
Rank Location Existing Condition Recommendation
4
137, 237, 235, 333,
233, 337, 335, 138,
136, 134, 336, 237,
236, 234, 338, 334
16 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 16 FLUOR CFL,
Spiral 13 W
Installation Cost $118 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $96
Breakeven Cost $594 Savings-to-Investment Ratio 5.0 Simple Payback yrs 1
Rank Location Existing Condition Recommendation
4
137, 237, 235, 333,
233, 337, 335, 138,
136, 134, 336, 2387,
236, 234, 338, 334
16 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 16 FLUOR CFL,
Spiral 13 W
Installation Cost $120 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $96
Breakeven Cost $594 Savings-to-Investment Ratio 4.9 Simple Payback yrs 1
Rank Location Existing Condition Recommendation
4
137, 237, 235, 333,
233, 337, 335, 138,
136, 134, 336, 2387,
236, 234, 338, 334
16 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 16 FLUOR CFL,
Spiral 13 W
Installation Cost $120 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $96
Breakeven Cost $594 Savings-to-Investment Ratio 5.0 Simple Payback yrs 1
Rank Location Existing Condition Recommendation
4 120-131 12 INCAN A Lamp, Std 25W with Manual
Switching
Replace with 12 FLUOR CFL,
Spiral 10 W
Installation Cost $88 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $59
Breakeven Cost $361 Savings-to-Investment Ratio 4.1 Simple Payback yrs 2
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Rank Location Existing Condition Recommendation
4 Laundry 3 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 3 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $150 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $85
Breakeven Cost $526 Savings-to-Investment Ratio 3.5 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
4 Basement 2 INCAN A Lamp, Std 60W with Manual
Switching
Replace with 2 FLUOR CFL,
Spiral 13 W
Installation Cost $15 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $7
Breakeven Cost $44 Savings-to-Investment Ratio 3.0 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
4 Laundry 3 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 3 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $150 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $72
Breakeven Cost $442 Savings-to-Investment Ratio 2.9 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
4 3.5 Lobby 2 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 2 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $100 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $44
Breakeven Cost $270 Savings-to-Investment Ratio 2.7 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
4 3.5 Lobby
FLUOR (2) T12 F40T12 35W U-Tube
Energy-Saver Magnetic with Manual
Switching
Replace with FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Program HighEfficElectronic
Installation Cost $50 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $22
Breakeven Cost $133 Savings-to-Investment Ratio 2.7 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
4 Basement FLUOR (4) T12 4' F40T12 34W Energy-
Saver (2) Magnetic with Manual Switching
Replace with FLUOR (4) T8 4'
F32T8 25W Energy-Saver (2)
Instant HighEfficElectronic
Installation Cost $80 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $28
Breakeven Cost $175 Savings-to-Investment Ratio 2.2 Simple Payback yrs 3
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Rank Location Existing Condition Recommendation
4 3.5 Storage INCAN A Lamp, Halogen 90W with Manual
Switching
Replace with FLUOR CFL,
Spiral 23 W
Installation Cost $10 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $3
Breakeven Cost $20 Savings-to-Investment Ratio 2.0 Simple Payback yrs 3
Rank Location Existing Condition Recommendation
4 EW Hall INCAN A Lamp, Halogen 60W with Manual
Switching
Replace with FLUOR CFL,
Spiral 13 W
Installation Cost $8 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $2
Breakeven Cost $14 Savings-to-Investment Ratio 1.9 Simple Payback yrs 3
Rank Location Existing Condition Recommendation
4
3.5 Janitor, 3.5
Laundry, 3.5 Linen,
Basement
23 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 23 FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $1,150 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $32
5
Breakeven Cost $2,014 Savings-to-Investment Ratio 1.8 Simple Payback yrs 4
Rank Location Existing Condition Recommendation
4 216 7 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with 7 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $350 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $85
Breakeven Cost $524 Savings-to-Investment Ratio 1.5 Simple Payback yrs 4
Rank Location Existing Condition Recommendation
4 213 4 FLUOR (3) T12 4' F40T12 40W Standard
(2) Magnetic with Manual Switching
Replace with 4 FLUOR (3) T8 4'
F32T8 25W Energy-Saver (2)
Instant HighEfficElectronic
Installation Cost $300 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $44
Breakeven Cost $274 Savings-to-Investment Ratio 0.9 Simple Payback yrs 7
Rank Location Existing Condition Recommendation
4 AHU 6 FLUOR (2) T12 4' F40T12 40W Standard
Magnetic with Manual Switching
Replace with 6 FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $300 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $42
Breakeven Cost $258 Savings-to-Investment Ratio 0.9 Simple Payback yrs 7
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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Exterior lighting for GILA Iditarod Hall is currently wall pack style fixtures high pressure sodium
(HPS) lamps. A common retrofit for this style of lighting is LED wall packs which produce
similar light levels at a much lower energy use.
Rank Location Existing Condition Recommendation
4 211 FLUOR (2) T12 4' F40T12 34W Energy-
Saver Magnetic with Manual Switching
Replace with FLUOR (2) T8 4'
F32T8 25W Energy-Saver
Instant HighEfficElectronic
Installation Cost $50 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $5
Breakeven Cost $30 Savings-to-Investment Ratio 0.6 Simple Payback yrs 10
Rank Location Existing Condition Recommendation
4 Housekeeping
Storage, Hallway
5 FLUOR (3) T12 4' F40T12 40W Standard
(2) StdElectronic with Manual Switching
Replace with 5 FLUOR (3) T8 4'
F32T8 25W Energy-Saver (2)
Instant HighEfficElectronic
Installation Cost $375 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $31
Breakeven Cost $192 Savings-to-Investment Ratio 0.5 Simple Payback yrs 12
Rank Location Existing Condition Recommendation
6 North Stairwell
FLUOR (2) T12 F40T12 35W U-Tube
Energy-Saver Magnetic with Manual
Switching
Replace with FLUOR (2) T8
F32T8 32W U-Tube Standard
Instant HighEfficElectronic
Installation Cost $60 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $102
Breakeven Cost $630 Savings-to-Investment Ratio 11 Simple Payback yrs 1
Rank Location Existing Condition Recommendation
7 Exterior Wall Packs 3 HPS 100 Watt Magnetic with Manual
Switching
Replace with 3 LED 23W
Module StdElectronic
Installation Cost $715 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $461
Breakeven Cost $2,853 Savings-to-Investment Ratio 4.0 Simple Payback yrs 2
Rank Location Existing Condition Recommendation
8 Exterior Wall Packs 6 HPS 150 Watt Magnetic with Manual
Switching
Replace with 6 LED 27W
Module StdElectronic
Installation Cost $3,145 Estimated Life of Measure (yrs) 7 Energy Savings (/yr) $1,379
Breakeven Cost $8,536 Savings-to-Investment Ratio 2.7 Simple Payback yrs 2
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
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A.2.2 Other Electrical Loads
Head bolt heaters use a considerable amount of energy when vehicles are left plugged in
continuously and having the head bolt heaters on for the entire day is not always necessary.
Installing a timer to alternate the head bolt heaters will help decrease energy usage. When the
temperature is above 20°F all of the outlets will be off, when the temperature is between -20°F
and 20°F half of the outlets will be on and rotate on half hour cycles through the day, and at
below -20°F all the outlets will be on.
A.3 Building Envelope: Recommendations for change
A.3.1 Exterior Walls
No EEMs are recommended in this area because additional insulation is not economical at this
time.
A.3.2 Foundation and/or Crawlspace
No EEMs are recommended in this area because additional insulation is not economical at this
time.
A.3.3 Roofing and Ceiling
No EEMs are recommended in this area because the roof already has a sufficient amount of
insulation and additional insulation is not economical at this time.
A.3.4 Windows
No EEMs are recommended in this area. An upgraded from the existing windows to better
insulated fiberglass windows was considered but was not economical.
Rank Location Existing Condition Recommendation
2 Head Bolt Heaters 5 Head Bolt Heaters with Manual Switching Add new Clock Timer or Other
Scheduling Control
Installation Cost $500 Estimated Life of Measure (yrs) 15 Energy Savings (/yr) $751
Breakeven Cost $8,825 Savings-to-Investment Ratio 18 Simple Payback yrs 1
Typical strategies for head bolts are:
Above 20 F, turn head bolts off
Temperature lower than 20 F but higher than -20 F, turn head bolts to cycle ½ time on
Temperature lower than -20 F, turn head bolts on full time
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A.3.5 Doors
There are two metal doors in GILA Iditarod Hall which had half-lite style windows. If windows
are not necessary, they can be replaced with a better insulated door.
A.4 Building Heating System / Air Conditioning
A.4.1 Heating and Heat Distribution
GILA Iditarod Hall’s domestic hot water circulating pump is a single speed pump. This pump
should be replaced with a more efficient variable speed pump comparable to a Grundfos Alpha.
This style of pump has been shown to save a minimum of 50% of electrical energy over
conventional pumps due to the motor design.
A.4.2 Air Conditioning
No EEMs are recommended in this area because there are no air conditioning units present in
GILA Iditarod Hall.
Rank Location Existing Condition Recommendation
9 Exterior Door: Metal
Full Lite
Door Type: Entrance, Metal, EPS core,
metal edge, half-lite
Modeled R-Value: 1.7
Remove existing door and install
standard pre-hung U-0.16
insulated door, including
hardware.
Installation Cost $1,038 Estimated Life of Measure (yrs) 30 Energy Savings (/yr) $98
Breakeven Cost $2,032 Savings-to-Investment Ratio 2.0 Simple Payback yrs 11
Rank Recommendation
5 replace hot water circulation pump with Grundfos alpha or equivalent
Installation Cost $1,000 Estimated Life of Measure (yrs) 20 Energy Savings (/yr) $736
Breakeven Cost $10,632 Savings-to-Investment Ratio 11 Simple Payback yrs 1
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A.4.3 Ventilation
The Q·Dot heat exchanger in the ventilation system was not operating properly during the visit.
It is recommended that a control contractor be sent out to evaluate this device and repair
controls and operation as necessary.
The Air Handling System in GILA Iditarod currently runs 24 hours seven days a week. Due to
the rising cost of electricity, it would be economical to put the system on a Variable Frequency
Drive (FVD). Doing so will allow for the motors to run a slower speeds to meet the demands of
the occupants in the building and save energy. An occupancy demand sensor such as a CO2
sensor in the ductwork or occupancy sensors in the classrooms should be used to determine
the necessary amount of ventilation. There should also be a temperature override installed so
that the Air Handling System will come on if the baseboard needs help to keep the temperature
of the building at the desired level.
A.4.4 Air Changes and Air Tightening
No EEMs are recommended in this area because of the difficulty of quantifying the amount of
leaking air and the savings. However, using a blower door test with an infra-red camera, the
location of significant leaks can be determined and repaired.
Rank Recommendation
1 Fix Q·dot to utilize heat recovery, Install Variable Speed Drive and Variable Speed Motors for SA-1/EF-
1. Install demand sensors (CO2 sensors in return duct and temperature overide control).
Installation Cost $21,700 Estimated Life of Measure (yrs) 15 Energy Savings (/yr) $41,141
Breakeven Cost $505,613 Savings-to-Investment Ratio 23 Simple Payback yrs 1
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Appendix B Energy Efficiency Measures that are NOT Recommended
As indicated in other sections of the report, a number of potential EEMs were identified that
were determined to be NOT cost effective by the AkWarm model. These EEMs are not
currently recommended on the basis of energy savings alone because each may only save a
small amount of energy, have a high capital cost, or be expensive to install. While each of
these EEMs is not cost effective at this time, future changes in building use such as longer
operating hours, higher energy prices, new fixtures or hardware on the market, and decreases
in installation effort may make any of these EEMs cost effective in the future. These potential
EEMs should be reviewed periodically to identify any changes to these factors that would
warrant re-evaluation.
Although these upgrades are not currently cost effective on an energy cost basis, the fixtures,
hardware, controls, or operational changes described in these EEMs should be considered
when replacing an existing fixture or unit for other reasons. For example, replacing an existing
window with a triple-pane window may not be cost effective based only on energy use, but if a
window is going to be replaced for some other reason, then the basis for a decision is only the
incremental cost of upgrading from a less efficient replacement window to a more efficient
replacement window. That incremental cost difference will have a significantly shorter payback,
especially since the installation costs are likely to be the same for both units.
The following measures were not found to be cost-effective:
Rank Feature/Location Improvement Description
Annual
Energy
Savings
Installed
Cost
Savings to
Investment
Ratio, SIR
Simple
Payback
(Years)
10
Window/Skylight:
Alum/ triple/ <3/8,
south
Replace existing windows
with Low E/argon fiberglass
or insulated vinyl windows
$46 $1,981 0.36 43
11 Lighting: EW Hall
Replace with 3 FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
$8 $150 0.32 19
12 Above-Grade Wall:
TDY, PCS & Core
Install R-10 rigid foam board
to exterior and cover with T1-
11 siding or equivalent.
$2,695 $176,591 0.32 65
13 Lighting: 132, 133
Replace with 4 FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
$10 $200 0.30 20
14 Lighting: Switch
Room
Replace with FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
$2 $50 0.22 27
15 Lighting: Mech Room,
216B
Replace with 3 FLUOR (2) T8
4' F32T8 25W Energy-Saver
Instant HighEfficElectronic
$4 $150 0.15 41
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Appendix C Significant Equipment List
HVAC Equipment
Equipment Manufacturer Model No. Fuel Type Estimated
Efficiency Notes
Shell and Tube Heat
Exchanger - B/G SU108-2 Steam 99% Estimated Input Rating:
3,000,000 Btu/hr
Indirect Hot Water Heater Roy Hanson SA285C Steam 99% Estimated Input Rating:
500,000 Btu/hr
CP1, CP2 Marathon Electric UVC
184TTDR7026DFL Electric - 5HP, 1740 rpm
SA-1 motor - - Electric - 5HP, 5520 CFM
EF-1 motor - - Electric - 5HP, 5500 CFM
Lighting
Location Lighting Type Bulb Type Quantity KWH/YR Cost/YR
EW, NW Hall, North Stairwell Fluorescent T12 14 8,978 $ 5,028
Entire Building Incan Exit 25W 12 5,260 2,946
120-131 Incandescent 60W 12 4,687 2,625
North Stairwell, East Stairwell Fluorescent T12 7 4,456 2,495
North Stairwell, East Stairwell Fluorescent T12 7 3,671 2,056
Exterior Wall Packs HPS 6 2,895 1,621
220-231, 320-331, 137, 237, 235, 333, 233, 337, 335,
138, 136, 134, 336, 237, 236, 234, 338, 334 Incandescent 60W 40 1,562 875
3.5 Janitor, 3.5 Laundry, 3.5 Linen, Basement Fluorescent T12 23 1,254 702
120-131 Incandescent 60W 12 1,172 656
Exterior Wall Packs HPS 3 1,007 564
Energy Consumption calculated by AkWarm based on Wattage and an electric rate of $0.56/KWH
Plug Loads
Equipment Location Manufacturer KWH/YR Cost/YR
Head Bolt Heaters Exterior - 2,683 $ 1,502
Commercial Washers Laundry Room varies 1,628 912
Coffee Makers (qty: 53) Rooms varies 899 503
Freezer 216 Jordon 698 391
Mini Fridges (qty: 55) Rooms varies 327 183
Hair Driers (qty:52) Rooms varies 242 136
Televisions (qty: 55) Rooms varies 239 134
Microwave (qty: 54) Rooms varies 209 117
Energy Consumption calculated by AkWarm based on Wattage and an electric rate of $0.56/KWH
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Appendix D Local Utility Rate Structure
The information in this section was provided directly from the local utility or gathered from the
local utility’s publicly available information at the time of the audit. All language used in this
section was provided by the local utility and believed to be current at the time of the audit.
Energy use terms, specific fees, and other specific information are subject to change. Updated
rate structure information should be gathered from the utility during future discussion of rates,
rate structures and utility pricing agreements.
Galena Electric Rate:
Electric Minimum Charge $22.53
Fuel Charge $0.3213 / kWh
Energy Charge $0.242 / kWh
Base Rate $0.5633 / kWh
Electric Minimum Charge (Customer Charge)
The customer charge is the minimum amount charged regardless of whether the customer uses
electricity during a month or not. The customer charge recovers some of the cost of reading the
meter and costs incurred from installing a transformer, meter, and service extension.
Fuel Charge
Fuel charge covers the cost of fuel and generating efficiency.
Energy Charge (Non fuel charge)
The non-fuel charge is established to recover all revenue requirements of the utility not related
to fuel.
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Appendix E Analysis Methodology
Data collected was processed using AkWarm energy use software to estimate current energy
consumption by end usage and calculate energy savings for each of the proposed energy
efficiency measures (EEMs). In addition, separate analysis may have been conducted to
evaluate EEMs that AkWarm cannot effectively model to evaluate potential reductions in annual
energy consumption. Analyses were conducted under the direct supervision of a Certified
Energy Auditor, Certified Energy Manager, or a Professional Engineer.
EEMs are evaluated based on building use, maintenance and processes, local climate
conditions, building construction type, function, operational schedule and existing conditions.
Energy savings are calculated based on industry standard methods and engineering
estimations. Each model created in AkWarm is carefully compared to existing utility usage
obtained from utility bills. The AkWarm analysis provides a number of tools for assessing the
cost effectiveness of various improvement options. The primary assessment value used in this
audit report is the Savings/Investment Ratio (SIR). The SIR is a method of cost analysis that
compares the total cost savings through reduced energy consumption to the total cost of a
project over its assumed lifespan, including both the construction cost and ongoing maintenance
and operating costs. Other measurement methods include Simple Payback, which is defined as
the length of time it takes for the savings to equal the total installed cost and Breakeven Cost,
which is defined as the highest cost that would yield a Savings/Investment Ratio of one.
EEMs are recommended by AkWarm in order of cost-effectiveness. AkWarm first calculates
individual SIRs for each EEM, and then ranks the EEMs by SIR, with higher SIRs at the top of
the list. An individual EEM must have a SIR greater than or equal to one in order to be
recommended by AkWarm. Next AkWarm modifies the building model to include the installation
of the first EEM and then re-simulates the energy use. Then the remaining EEMs are re-
evaluated and ranked again. AkWarm goes through this iterative process until all suggested
EEMs have been evaluated.
Under this iterative review process, the savings for each recommended EEM is calculated
based on the implementation of the other, more cost effective EEMs first. Therefore, the
implementation of one EEM affects the savings of other EEMs that are recommended later.
The savings from any one individual EEM may be relatively higher if the individual EEM is
implemented without the other recommended EEMs. For example, implementing a reduced
operating schedule for inefficient lighting may result in relatively higher savings than
implementing the same reduced operating schedule for newly installed lighting that is more
efficient. If multiple EEMs are recommended, AkWarm calculates a combined savings.
Inclusion of recommendations for energy savings outside the capability of AkWarm will impact
the actual savings from the AkWarm projections. This will almost certainly result in lower
energy savings and monetary savings from AkWarm recommendations. The reality is that only
so much energy is consumed in a building. Energy savings from one EEM reduces the amount
of energy that can be saved from additional EEMs. For example, installation of a lower wattage
light bulb does not save energy or money if the bulb is never turned on because of a schedule
or operational change at the facility.
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Appendix F Audit Limitations
The results of this audit are dependent on the input data provided and can only act as an
approximation. In some instances, several EEMs or installation methods may achieve the
identified potential savings. Actual savings will depend on the EEM selected, the price of
energy, and the final installation and implementation methodology. Competent tradesmen and
professional engineers may be required to design, install, or otherwise implement some of the
recommended EEMs. This document is an energy use audit report and is not intended as a
final design document, operation, and maintenance manual, or to take the place of any
document provided by a manufacturer or installer of any device described in this report.
Cost savings are calculated based on estimated initial costs for each EEM. Estimated costs
include labor and equipment for the full up-front investment required to implement the EEM.
The listed installation costs within the report are conceptual budgetary estimates and should not
be used as design estimates. The estimated costs are derived from Means Cost Data, industry
publications, local contractors and equipment suppliers, and the professional judgment of the
CEA writing the report and based on the conditions at the time of the audit.
Cost and energy savings are approximations and are not guaranteed.
Additional significant energy savings can usually be found with more detailed auditing
techniques that include actual measurements of electrical use, temperatures in the building and
HVAC ductwork, intake and exhaust temperatures, motor runtime and scheduling, and infrared,
air leakage to name just a few. Implementation of these techniques is the difference between a
Level III Energy Audit and the Level II Audit that has been conducted.
Disclaimer: "This report was prepared as an account of work sponsored by an agency of the
United States Government. Neither the United States Government nor any agency thereof, nor
any of their employees, makes any warranty, express or implied, or assumes any legal liability
or responsibility for the accuracy, completeness, or usefulness of any information, apparatus,
product, or process disclosed, or represents that its use would not infringe privately owned
rights. Reference herein to any specific commercial product, process, or service by trade name,
trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement,
recommendation, or favoring by the United States Government or any agency thereof. The
views and opinions of authors expressed herein do not necessarily state or reflect those of the
United States Government or any agency thereof."
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Appendix G References
Although not all documents listed below are specifically referenced in this report, each contains
information and insights considered valuable to most buildings.
Alaska Department of Education and Early Development; Education Support Services/Facilities.
(1999). Alaska School Facilities Preventative Maintenance Handbook. Juneau, AK:
Alaska Department of Education and Early Development.
Alaska Housing Finance Corportation. (2010). Retrofit Energy Assessment for Loans. AHFC.
ASHRAE. (1997). 1997 ASHRAE Handbook: Fundamentals. Atlanta, GA: ASHRAE.
ASHRAE. (2007). ASHRAE Standard 105-2007 Expressing and Comparing Building Energy
Performance. Retrieved from ASHRAE: www.ashrae.org
ASHRAE. (2007). ASHRAE Standard 90.1-2007 Energy Standards for buildings Except Low-
Rise Residential Buildings. Retrieved from ASHRAE: www.ashrae.org
ASHRAE. (2010). ASHRAE Standard 62.1-2010 Ventilaton for Acceptable Indoor Air Quality.
Retrieved from ASHRAE: www.ashrae.org
ASHRAE. (2010). ASHRAE Standard 62.2-2010 Ventilation and Acceptable Indoor Air Quality in
Low Rise Residential Buildings. Retrieved from ASHRAE: www.ashrae.org
ASHRAE RP-669 and SP-56. (2004). Procedures for Commercial Building Energy Audits.
Atlanta, GA: ASHRAE.
Coad, W. J. (1982). Energy Engineering and Management for Building Systems. Scarborough,
Ontario, Canada: Van Nostrand Reinhold Company.
Daley, D. T. (2008). The Little Black Book of Reliability Management. New York, NY: Industrial
Press, Inc.
Federal Energy Management Program. (2004, March 3). Demand Controlled Ventilation Using
CO2 Sensors. Retrieved 2011, from US DOE Energy Efficiency and Renewable Energy:
http://www.eere.energy.gov/femp/pdfs/fta_co2.pdf
Federal Energy Management Program. (2006, April 26). Low-Energy Building Design
Guidelines. Retrieved 2011, from Department of Energy; Federal Energy Management
Program: http://www.eren.doe.gov/femp/
Institute, E. a. (2004). Variable Speed Pumping: A Guide to Successful Applications. Oxford,
UK: Elsevier Advanced Technology.
International Code Council. (2009). International Energy Conservation Code. Country Club Hills,
IL: International Code Council, Inc.
Leach, M., Lobato, C., Hirsch, A., Pless, S., & Torcellini, P. (2010, September). Technical
Support Document: Strategies for 50% Energy Savings in Large Office Buildings.
Retrieved 2011, from National Renewable Energy Laboratory:
http://www.nrel.gov/docs/fy10osti/49213.pdf
Thumann, P.E., C.E.M., A., Younger, C.E.M., W. J., & Niehus, P.E., C.E.M., T. (2010).
Handbook of Energy Audits Eighth Edition. Lilburn, GA: The Fairmont Press, Inc.
U.S. Energy Information Administration. (2006). Commercial Building Energy Consumption
Survey (CBECS). Retrieved 2011, from Energy Information Administration:
http://www.eia.gov/emeu/cbecs/
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Appendix H Typical Energy Use and Cost – Fairbanks and Anchorage
This report provides data on typical energy costs and use on selected building in Fairbanks and
Anchorage, Alaska for comparative purposes only. The values provided by the US Energy
Information Administration CBECS study included a broader range of building types for the
Continental U.S. are not necessarily good comparatives for buildings and conditions in Alaska.
An assortment of values from CBECS may be found in Appendix I.
The Alaska data described in this report came from a benchmarking study NORTECH and other
Technical Services Providers (TSPs) completed on publicly owned buildings in Alaska under
contract with AHFC. This study acquired actual utility data for municipal buildings and schools
in Alaska for the two recent full years. The utility data included costs and quantities including
fuel oil, electricity, propane, wood, steam, and all other energy source usage. This resulted in a
database of approximately 900 buildings. During the course of the benchmarking study, the
comparisons made to the CBECS data appeared to be inappropriate for various reasons.
Therefore, this energy use audit report references the average energy use and energy cost of
Anchorage and Fairbanks buildings as described below.
The Alaska benchmarking data was evaluated in order to find valid comparison data. Buildings
with major energy use information missing were eliminated from the data pool. After detailed
scrutiny of the data, the most complete information was provided to NORTECH by the
Fairbanks North Star Borough School District (FNSBSD) and the Anchorage School District
(ASD). The data sets from these two sources included both the actual educational facilities as
well as the district administrative buildings and these are grouped together in this report as
Fairbanks and Anchorage schools. These two sources of information, being the most complete
and reasonable in-state information, have been used to identify an average annual energy
usage for Fairbanks and for Anchorage in order to provide a comparison for other facilities in
Alaska.
Several factors may limit the comparison of a specific facility to these regional indicators. In
Fairbanks, the FNSBSD generally uses number two fuel oil for heating needs and electricity is
provided by Golden Valley Electric Association (GVEA). GVEA produces electricity from a coal
fired generation plant with additional oil generation upon demand. A few of the FNSBSD
buildings in this selection utilize district steam and hot water. The FNSBSD has recently (the
last ten years) invested significantly in envelope and other efficiency upgrades to reduce their
operating costs. Therefore a reader should be aware that this selection of Fairbanks buildings
has energy use at or below average for the entire Alaska benchmarking database.
Heating in Anchorage is through natural gas from the nearby natural gas fields. Electricity is
also provided using natural gas. As the source is nearby and the infrastructure for delivery is in
place, energy costs are relatively low in the area. As a result, the ASD buildings have lower
energy costs, but higher energy use, than the average for the entire benchmarking database.
These special circumstances should be considered when comparing the typical annual energy
use for particular buildings.
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Appendix I Typical Energy Use and Cost – Continental U.S.
Released: Dec 2006
Next CBECS will be conducted in 2007
Table C3. Consumption and Gross Energy Intensity for Sum of Major Fuels for Non-Mall Buildings, 2003
All Buildings* Sum of Major Fuel Consumption
Number of
Buildings
(thousand)
Floorspace
(million
square feet)
Floorspace
per Building
(thousand
square feet)
Total
(trillion
BTU)
per
Building
(million
BTU)
per
Square
Foot
(thousand
BTU)
per
Worker
(million
BTU)
All Buildings* 4,645 64,783 13.9 5,820 1,253 89.8 79.9
Building Floorspace (Square Feet)
1,001 to 5,000 2,552 6,789 2.7 672 263 98.9 67.6
5,001 to 10,000 889 6,585 7.4 516 580 78.3 68.7
10,001 to 25,000 738 11,535 15.6 776 1,052 67.3 72.0
25,001 to 50,000 241 8,668 35.9 673 2,790 77.6 75.8
50,001 to 100,000 129 9,057 70.4 759 5,901 83.8 90.0
100,001 to 200,000 65 9,064 138.8 934 14,300 103.0 80.3
200,001 to 500,000 25 7,176 289.0 725 29,189 101.0 105.3
Over 500,000 7 5,908 896.1 766 116,216 129.7 87.6
Principal Building Activity
Education 386 9,874 25.6 820 2,125 83.1 65.7
Food Sales 226 1,255 5.6 251 1,110 199.7 175.2
Food Service 297 1,654 5.6 427 1,436 258.3 136.5
Health Care 129 3,163 24.6 594 4,612 187.7 94.0
Inpatient 8 1,905 241.4 475 60,152 249.2 127.7
Outpatient 121 1,258 10.4 119 985 94.6 45.8
Lodging 142 5,096 35.8 510 3,578 100.0 207.5
Retail (Other Than Mall) 443 4,317 9.7 319 720 73.9 92.1
Office 824 12,208 14.8 1,134 1,376 92.9 40.3
Public Assembly 277 3,939 14.2 370 1,338 93.9 154.5
Public Order and Safety 71 1,090 15.5 126 1,791 115.8 93.7
Religious Worship 370 3,754 10.1 163 440 43.5 95.6
Service 622 4,050 6.5 312 501 77.0 85.0
Warehouse and Storage 597 10,078 16.9 456 764 45.2 104.3
Other 79 1,738 21.9 286 3,600 164.4 157.1
Vacant 182 2,567 14.1 54 294 20.9 832.1
This report references the Commercial Buildings Energy Consumption Survey (CBECS), published by the U.S.
Energy Information Administration in 2006. Initially this report was expected to compare the annual energy
consumption of the building to average national energy usage as documented below. However, a direct comparison
between one specific building and the groups of buildings outlined below yielded confusing results. Instead, this
report uses a comparative analysis on Fairbanks and Anchorage data as described in Appendix F. An abbreviated
excerpt from CBECS on commercial buildings in the Continental U.S. is below.
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Appendix J List of Conversion Factors and Energy Units
1 British Thermal Unit is the energy required to raise one pound of water one degree
1 Watt is approximately 3.412 BTU/hr
1 horsepower is approximately 2,544 BTU/hr
1 horsepower is approximately 746 Watts
1 "ton of cooling” is 12,000 BTU/hr, the amount of power required to melt one short
ton of ice in 24 hours
1 Therm = 100,000 BTU
1 KWH = 3413 BTU
1 KW = 3413 BTU/Hr
1 Boiler HP = 33,400 BTU/Hr
1 Pound Steam = 1000 BTU
1 CCF of natural gas = about 1 Therm
1 Pascal (Pa) = 1 inch H2O = 0.363 pounds/square inch (psi)
1 Pascal (Pa) = 0.0025 atmospheres (atm)
BTU British Thermal Unit
CCF 100 Cubic Feet
CFM Cubic Feet per Minute
GPM Gallons per minute
HP Horsepower
Hz Hertz
kg Kilogram (1,000 grams)
kV Kilovolt (1,000 volts)
kVA Kilovolt-Amp
kVAR Kilovolt-Amp Reactive
KW Kilowatt (1,000 watts)
KWH Kilowatt Hour
V Volt
W Watt
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Appendix K List of Acronyms, Abbreviations, and Definitions
ACH
Air Changes per Hour
AFUE Annual Fuel Utilization Efficiency
Air Economizer A duct, damper, and automatic control system that
allows a cooling system to supply outside air to reduce
or eliminate the need for mechanical cooling.
Ambient Temperature Average temperature of the surrounding air
Ballast A device used with an electric discharge lamp to cause
the lamp to start and operate under the proper circuit
conditions of voltage, current, electrode heat, etc.
CO2 Carbon Dioxide
CUI Cost Utilization Index
CDD Cooling Degree Days
DDC Direct Digital Control
EEM Energy Efficiency Measure
EER Energy Efficient Ratio
EUI Energy Utilization Index
FLUOR Fluorescent
Grade The finished ground level adjoining a building at the
exterior walls
HDD Heating Degree Days
HVAC Heating, Ventilation, and Air-Conditioning
INCAN Incandescent
NPV Net Present Value
R-value Thermal resistance measured in BTU/Hr-SF-̊F (Higher
value means better insulation)
SCFM Standard Cubic Feet per Minute
Savings to Investment Ratio (SIR) Savings over the life of the EEM divided by Investment
capital cost. Savings includes the total discounted dollar
savings considered over the life of the improvement.
Investment in the SIR calculation includes the labor and
materials required to install the measure.
Set Point Target temperature that a control system operates the
heating and cooling system
Simple payback A cost analysis method whereby the investment cost of
an EEM is divided by the first year’s savings of the EEM
to give the number of years required to recover the cost
of the investment.
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
F:\00-Jobs\2011\2602 F - AHFC Grade Audits\50-300 Doyon Other Region\50-370 Galena City SD\50-383 GILA Iditarod Hall\Reports\Final\20120413 AHFC Report
GAL GILA Iditarod Hall.Docx
39
Appendix L Building Floor Plan
Building Floor Plan provided by Galena Interior Learning Academy
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
F:\00-Jobs\2011\2602 F - AHFC Grade Audits\50-300 Doyon Other Region\50-370 Galena City SD\50-383 GILA Iditarod Hall\Reports\Final\20120413 AHFC Report
GAL GILA Iditarod Hall.Docx
40
Building Floor Plan provided by Galena Interior Learning Academy
Energy Audit – Final Report
GILA Iditarod Hall
Galena, Alaska
F:\00-Jobs\2011\2602 F - AHFC Grade Audits\50-300 Doyon Other Region\50-370 Galena City SD\50-383 GILA Iditarod Hall\Reports\Final\20120413 AHFC Report
GAL GILA Iditarod Hall.Docx
41
Building Floor Plan provided by Galena Interior Learning Academy