HomeMy WebLinkAboutBBNC-JZZ-CAEC Koliganek School 2012-EEENERGY AUDIT DRAFT REPORT
Koliganek School
Koliganek, AK 99576
p (907) 842-5280
AkWarm ID No. BBNC-JZZ-CAEC-01
800 F Street
Anchorage, AK 99501
p (907) 276-6664 f (907) 276-5042
Contact: Walter K. Heins, P.E., CCP, CxA, CEA
32215 Lakefront Dr.
Soldotna, Alaska 99669
p (907) 260-5311
Contact: Jerry P. Herring, PE, CEA
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. i AkWarm No. BBNC-JZZ-CAEC-01
Contents
I. Executive Summary .................................................................................................................. 1
I.I Koliganek K-12 School ECMs ............................................................................................................. 2
I.II Portable Buildings ECMs .................................................................................................................... 4
II. Introduction .............................................................................................................................. 5
III. Energy Audit Process ............................................................................................................. 6
IV. Method of Analysis ................................................................................................................. 7
V. Building Description ................................................................................................................ 8
V.I School Architectural Description ........................................................................................................ 8
V.II School Mechanical Description ......................................................................................................... 8
V.III School Electrical Description ........................................................................................................... 9
VI. Portables Description ........................................................................................................... 10
VI.I Portables Architectural Description ................................................................................................. 10
VI.II Portables Mechanical Description .................................................................................................. 10
VI.III Portables Electrical Description .................................................................................................... 10
VII. Historic Energy Consumption and Cost ........................................................................... 11
VII.I Electrical Consumption Data ......................................................................................................... 11
VII.II Fuel Oil Consumption Data .......................................................................................................... 11
VII.III Overall Consumption Data .......................................................................................................... 11
VIII. Equipment Inventory and Photo Survey ........................................................................ 13
IX. Energy Conservation Measures .......................................................................................... 14
IX.I School ECMs ................................................................................................................................... 14
IX.II Portables ECMs .............................................................................................................................. 18
Appendices
Appendix A – Energy Benchmark Data
Appendix B – AkWarm Commercial Reports
Appendix C – Major Equipment List
Appendix D – Energy Conservation Measures
Appendix E – Site Visit Photos
Appendix F – AkWarm Model of Portable Building
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REPORT DISCLAIMER
The information contained within this report, including any attachment(s), is intended solely for
use by the named addressee(s). If you are not the intended recipient, or a person designated as
responsible for delivering such messages to the intended recipient, you are not authorized to
disclose, copy, distribute or retain this report, in whole or in part, without written authorization
from Coffman Engineers, Inc., 800 F Street, Anchorage, AK 99501.
This report may contain proprietary, confidential or privileged information. If you have received
this report in error, please notify the sender immediately. Thank you for your anticipated
cooperation.
LIMITATIONS OF STUDY
All results are dependent on the quality of input data provided. In this case, data was incomplete,
and the site investigation was limited to observable conditions. No testing or destructive
investigations were undertaken. Although energy-conserving methods are described in the
ECMs, in some instances different methods may also achieve the identified savings. Detailed
engineering is required in order to develop the ECMs to a realizable project. This audit and
report are thus intended to offer approximations of the results achievable by the listed
improvements. This report is not intended to be a final design document. All responsibilities and
liabilities, including but not limited to safety, design, and performance guarantees, are incumbent
upon the design professional or other persons whether following this report’s or other
recommendations. All ECMs provided herein are the energy analyst’s best opinion of probable
costs and savings. Budget for engineering and design of these projects is not included in the
opinion of probable cost for each measure.
The economic analysis for the recommended Energy Conservation Measures (ECMs) relating to
lighting improvements are based solely on energy savings. Additional savings may be realized in
reduced maintenance. The new generation fluorescent and LED lighting systems typically have
significantly longer lamp and ballast life compared to the fixtures being replaced. Long term
labor savings can be significant in high areas like Gyms and exterior parking lots where special
equipment is required for maintenance. Another important benefit, albeit difficult to quantify, is
the overall improvement in lighting quality. The new light sources typically have a higher color
rendering index which improves the overall appearance of the space. Numerous studies have
concluded that good quality lighting improves the performance of students and workers in the
built environment.
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I. Executive Summary
This report presents the findings of an energy audit conducted at Koliganek K-12 School as part of a
contract for:
Alaska Housing Finance Corporation
Contact: Rebekah Luhrs
4300 Boniface Parkway
Anchorage, AK 99510
Email: rluhrs@ahfc.us
SW Region School District
Contact: Rick Dallmann
P.O. Box 90
Dillingham, AK 99576
Email: rdallmann@swrsd.org
(907) 842-5280
This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the
use of innovation and technology to solve energy and environmental problems in a way that improves the
State of Alaska’s economy. This can be achieved through the wiser and more efficient use of energy.
The average January 2009-December 2010 documented annual utility costs at this facility are as follows:
Electricity $79,162
Fuel Oil #1 $138,196
Total $217,358
January 2009-December 2010 Energy Utilization Index (EUI) = 195.4 kBtu/sf
January 2009-December 2010 Energy Cost Index = 9.72 $/sf
Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive
Summary Table with the energy analyst’s best opinion of probable cost, savings, and investment returns.
Be aware that the measures are not additive because of the interrelation of several of the measures. The
cost of each measure for this level of audits is ± 30% until detailed engineering, specifications, and hard
proposals are obtained. See section IX for detailed descriptions of all cost effective ECMs.
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I.I Koliganek K-12 School ECMs
This table presents an Executive Summary of ECMs for the main school building and the three connected
portable buildings. Please see Section I.II for an Executive Summary of ECMs for the portable buildings
associated with Koliganek K-12 School.
Executive Summary – Recommended Energy Conservation Measures
Koliganek School (KS)
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
KS-0a Refrigerators Replace Refrigerators older
than 5 years old
- - - <10 years
KS-1 Setback Thermostat:
Gymnasium
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Gymnasium space.
$3,247 $400 121.82 0.1
KS-2 Setback Thermostat:
Outbuildings Heated
Off Main School
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Outbuildings space.
$4,790 $800 89.87 0.2
KS-3 Setback Thermostat:
Classrooms/Offices
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Classrooms/Offices space.
$14,149 $5,600 37.92 0.4
KS-4 Lighting:
Classrooms and
Offices Spaces
Add new Occupancy
Sensors, and Retrofit T12
light Fixtures with T8 Lamps
$26,653 $28,800 14.25 1.1
KS-5 Lighting: Restrooms Replace with 8 FLUOR T8
4' F32T8 32W Electronic
Ballast and Add new
Occupancy Sensors
$1,990 $2,400 12.76 1.2
KS-6 Lighting: Corridors Replace with 25 FLUOR T8
4' F32T8 32W Electronic
Ballast; and replace
incandescent lamps with
CFL's
$2,209 $5,400 6.36 2.4
KS-7 Lighting: Shop
Class
Replace with 18 FLUOR T8
4' F32T8 32W Standard
Program StdElectronic
$1,021 $3,600 4.37 3.5
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Executive Summary – Recommended Energy Conservation Measures
Koliganek School (KS)
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
KS-8 Lighting: Gym and
Gym Storage
Replace with 20 FLUOR (6)
T5 45.2" F54W/T5 HO
Standard (2) StdElectronic
and Add new Occupancy
Sensor, Multi-Level Switch
and Replace with 4 FLUOR
T8 4' F32T8 32W Electronic
Ballast and Add new
Occupancy Sensors
$6,804 $24,600 4.26 3.6
KS-9 HVAC And DHW Replace boilers $11,461 $62,100 3.52 5.4
KS-10 Lighting: Exterior Replace with LED Module
StdElectronic
$1,478 $7,000 3.25 4.7
KS-11 Lighting: Kitchen,
Cafeteria, and
Pantry
Replace with FLUOR T8 4'
F32T8 32W Standard
Program StdElectronic
$702 $3,400 3.17 4.8
KS-12 Cathedral Ceiling:
School
Add R-11 to existing
insulation.
$627 $6,300 2.68 10
KS-13 Exterior Door: Solid
Doors
Remove existing door and
install U-0.16 fiberglass door
with polyurethane core
$467 $4,900 1.86 10.4
KS-14 Exterior Door:
Quarter Light Doors
Remove existing door and
install U-0.16 fiberglass door
with polyurethane core
$534 $5,500 1.89 10.2
KS-15 Air Tightening Perform air sealing to reduce
air leakage by 20%.
$10,328 $75,000 1.42 7.3
Note:
a Due to advances in refrigerators in the previous 5 years, new Energy Star refrigerators are much more
efficient and result in viable energy savings.
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I.II Portable Buildings ECMs
The ECMs shown in the Portable Building Executive Summary, below, are based on an AkWarm model
for one portable building. Six portables exist at the site, however three of the portable units are heated
using hot water supplied in buried arctic pipe from the school, and their ECM's are described in the report
section I.I. The remaining three portable units are heated using a centrally located, stand alone fuel oil #1
boiler. Multiply the annual energy savings and installed costs by three to obtain savings and costs for the
portables.
Executive Summary – Recommended Energy Conservation Measures (ECMs)
Portable Building (PB)
Rank Feature Recommendation
Annual
Energy
Savings
Installed
Cost SIR Payback
(years)
PB-1 Setback
Thermostat:
Portable Building
Implement a Heating
Temperature
Unoccupied Setback
to 60.0 deg F for the
Portable Building
space.
$1,174 $500 35.24 0.4
PB-2 Exterior Door:
Portable Building -
Doors
Remove existing door
and install standard
pre-hung U-0.16
insulated door,
including hardware.
$63 $600 2.79 9.7
PB-3 Air Tightening Perform air sealing to
reduce air leakage by
30%.
$195 $1,500 1.34 7.7
PB-4 Window/Skylight:
Portable Building -
Single Pane
Windows
Replace existing
window with U-0.22
vinyl window
$469 $7,300 1.24 15.5
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II. Introduction
This comprehensive energy audit covers the 20,348 square feet (sf) Koliganek K-12 School that includes
classrooms, administrative offices, a wood shop, a gymnasium, etc. The school also includes two portable
classroom units averaging 1,152 sf each, two housing portables at 924 sf each, and two housing portables
at 1600 sf each. The energy audit was conducted in order to evaluate areas and equipment where utility
savings relative to a baseline can be realized with reasonable project financial ratios and payback. The
location of the school is shown in the following map.
Koliganek, Alaska – Google Maps
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III. Energy Audit Process
Prior to visiting the school, the first task was to collect and review two years of utility data for electricity
and fuel oil usage. This information was used to analyze operational characteristics, calculate energy
benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to
monitor the effectiveness of implemented energy conservation measures. A spreadsheet was used to enter,
sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary
benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see
Section VII).
After gathering the utility data and calculating the EUI, the next step in the audit process was to review
the architectural and engineering drawings to develop a building profile which documented building age,
type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating,
and Air Conditioning, (HVAC), water heating, refrigeration, snow-melt, and etc. The building profile is
utilized to generate, and answer, possible questions regarding the facility’s energy usage. These questions
were then compared to the energy usage profiles developed during the utility data gathering step. After
this information was gathered, the next step in the process was the physical site investigation (site visit).
The site visit was completed on August 8, 2011, and was spent inspecting the actual systems and
answering specific questions from the preliminary review. Our on-site contact during the investigation
was Mr. Rick Dallman of the SWRSD Maintenance Department1. Occupancy schedules, O&M practices,
building energy management program, and other information that has an impact on energy consumption
were obtained. After the site visit, the energy audit includes an evaluation of the information gathered,
researching possible conservation opportunities, organizing the audit into a comprehensive report, and
making ECM recommendations for mechanical, electrical and building envelope improvements.
1 Mr. Rick Dallman, (907) 842-5280 (office)
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IV. Method of Analysis
Having completed the preliminary audit tasks noted in Section III, Coffman Engineers, Inc., (CEI)
conducted a site survey. The site survey provides critical input in deciphering where energy opportunities
exist within a facility. The audit team walked the entire site to inventory the building envelope and major
equipment including HVAC, water heating, lighting, and equipment in shops, kitchens, offices, and
classrooms. An understanding of how the equipment is used is determined during the audit.
The collected data was entered into AkWarm Commercial™ software, an energy calculating program for
buildings. The data was processed by AkWarm to model a baseline from which ECMs could be
considered. The model was compared to actual utility costs to ensure the quality of baseline and proposed
energy modeling performed by AkWarm. The recommended ECMs focus on building envelope, HVAC,
lighting, water heating, and other electrical measures that will reduce annual energy consumption.
ECMs are evaluated based on building use and processes, local climate conditions, building construction
type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment
is proposed, energy consumption is calculated based on the manufacturer’s cataloged information where
possible. Energy savings are calculated by AkWarm.
Implementation of more than one ECM often affects the savings of other ECMs. The savings may in
some cases be relatively higher for an ECM implemented individually than when that ECM is just one of
multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient
lighting systems may result in a given savings. Also implementing a more efficient lighting system will
add to the savings, but less than the efficient lighting would alone because there is less energy to be saved
when the lights are on a reduced operating schedule. Thus, if multiple ECM’s are recommended, the
combined savings must be calculated and identified appropriately in groups.
In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM
which is based on the typical life of the equipment being replaced or altered. The energy savings are
extrapolated throughout the simple lifetime of the ECM. The total energy savings is calculated as the total
lifetime multiplied by the yearly energy savings.
The costs savings and installation costs are used to calculate simple payback2 and the Savings to
Investment Ratio3 (SIR).These are listed in Appendix D and summarized in the Executive Summary
Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed
cost. Cost savings are calculated based on the historical energy costs for the building. Installation costs
include labor and equipment to evaluate the initial investment required to implement and ECM. These are
applied to each recommendation with simple paybacks calculated. The energy analyst’s opinions of
probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors
and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net
savings.
2 The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost
divided by Savings).
3 Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is
how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over
the life of the measure minus PV of maintenance costs.
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V. Building Description
The Koliganek K-12 school is a single story facility with a full basement under half of the building. It is a
wood framed, aluminum sided building originally constructed in 1959. There have been multiple
additions to the school, but only minor changes in original equipment. The school has seven classrooms, a
multi-purpose gymnasium, kitchen, library, a wood shop, a welding area, and an administrative area. The
facility is normally occupied from 7am to 5pm five days a week during the school year, which is typically
late August through late May. There are approximately 80 occupants during regular school hours.
Community events are occasionally held on Saturdays in the Multi-Purpose Room, and attendance will
vary. In summer months, the school is unoccupied and the HVAC systems are turned off.
V.I School Architectural Description
The basement walls consist of poured concrete walls, 10 feet (ft) high, with two inches (in) of rigid
insulation installed on the top 3 ft of the exterior walls. The above ground walls are 2x6 studs on 16 in
centers with R-19 fiberglass batt insulation, a vapor barrier, and drywall, having an effective R-Value of
R-15.4. The lower R-value of the composite wall reflects the degradation of the insulation due to age. The
wall height in most rooms throughout the school is 10 feet high. There is 3,298 square feet (sf) of below
ground wall and 16,772 sf of above ground (stud) wall.
Floor construction for the school’s basement consists of poured concrete floors. The floors underneath the
shop areas could not be accessed, but it was assumed from similarly constructed schools in the region that
the floors consist of wood I-beam floor joists and R-19 fiberglass batt insulation. The floor structure is
covered on the underside with a plywood soffit. Underneath the bathroom areas in the gym area, a skirted
crawlspace area is insulated with two inches of rigid insulation. The remainder of the gym floor is
constructed of I-beam joist with 6 in of batt insulation around the perimeter, for an estimated composite
R-value of R-20.9. The basement area in the school is 5,479 sf, the main floor of the school is 6,915 sf,
the gym and shop wing of the school is 6,357 sf.
Roof construction could not be verified during the site visit but it was assumed, based on similarly
constructed schools in the region, that the roof construction consists of metal roofing, 7 in batt insulation,
a vapor barrier, and the ceiling finish for an effective R-Value of R-23.6. The total roof area for the school
is 23,331 sf which includes an estimated 1.41 slope factor for the roof.
Windows in the school are wood framed, double-paned glass with ½ in airspace and an estimated R-
Value of R-2. Window types in the school include both fixed pane and operable pane models. The total
south facing window area is approximately 207 sf, with the total window area of the school approximated
at 827 sf.
The building has three types of exterior doors that include quarter light metal doors, solid metal doors,
and an overhead garage door in the shop area. Both the quarter light and solid metal doors have an R-
value of 1.7 with a total area of 189 sf and 168 sf in area, respectively, while the garage door has an R-
value of R-6.3 and is 90 sf.
V.II School Mechanical Description
The school building is heated using a hydronic system. Two Burnham fuel oil-fired boilers heat the
system, which uses water as its fluid medium. The boiler loop from each boiler combines into a
distribution manifold, from which several inline pumps circulate heating water throughout the building.
Boiler B-1 is a Burnham PF-505 model, with a Carlin 201 CRD burner while boiler B-2 is a Burnham
V907WML model with a Carlin 702 CRD burner. All pumps, except the cold water pump and one of the
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heating circulating pumps, are Grundfos pumps. There are a total of two hot water recirculation pumps,
eight building circulation pumps, and one cold water pump.
All ventilation units have hydronic heating coils fed from the hydronic system. No mechanical cooling is
provided for any equipment in the building. There are three air handling units. AHU-1, a Carrier Model
39BA060B20 located in the fan room above the gym area , serves the classroom spaces with an estimated
3,400 cubic feet per minute (CFM) of air moved by a 2 horsepower fan. The gym area is served by AHU-
2, a Carrier Model 39BA060B20, that is powered by a 2 horsepower motor and moves 3,400 CFM of air.
AHU-3 is a Trane Torrivent TVDB0GAE0C3NCR04 unit and serves the woodshop areas. It has a 1
horsepower motor moving 1,700 CFM of air. All air handling units are constant volume, and run on
occupancy schedules.
All of the ventilation units, considered to be in fair working order, are approaching the end of their service
life as they were part of original construction of the building in 1959. The primary consequence of aging
equipment is deterioration in reliability with commensurate increases in maintenance and repair costs.
The remaining useful life of the equipment is presented in Appendix C.
Building domestic hot water is provided by two Amtrol 120 gallon indirect hot water heaters. One hot
water heater is located in the main mechanical room while the other water heater is located in the
downstairs mechanical room. The hot water systems are each equipped with a circulation pump to provide
hot water on demand for plumbing fixtures throughout the building. The hot water heaters, circulation
pumps, and the associated heating water injection pumps were installed within the last 10 years and
appear to be in fair working condition.
V.III School Electrical Description
Interior lighting for the Koliganek School is primarily provided by fluorescent light fixtures controlled by
manual wall switches. These light fixtures were originally installed with T12 lamps and magnetic ballasts,
but over the years some have been converted to used T8 lamps and a few are equipped with electronic
ballasts. Many of the light fixtures appear to have failed ballasts and lamps that should be replaced. The
lighting in the two portable classrooms is in such poor condition that the fixtures were observed to take
several hours to switch on; this is an indication of bad ballasts and lamps.
The gym lighting is composed of approximately 20 mercury vapor high bay light fixtures, these have an
advantage of extremely long life, but the lamp output does decline with time while the power
consumption increases. Additionally mercury vapor light fixtures provide very poor color rendition. The
gym was observed to be illuminated to only about 3.5 foot candles with is much lower than the suggested
lighting levels by the IESNA suggested lighting levels for this type of space.
Exterior lighting is provided by high pressure sodium wall packs and canopy lights. These light fixtures
were observed to be controlled by an on/off photoswitch.
Other electricity-using equipment not previously described in the mechanical or electrical sections include
two walk-in refrigerators and a small walk-in freezer (which are shut down in the summer to save
energy), a microwave and other various kitchen equipment, and various user equipment such as
projectors, computers, and printers. There is also a variety of wood shop equipment including bench
grinders, a drill press, and various types of saws and sanders. The school also has a standby, reciprocating
diesel generator.
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VI. Portables Description
The Koliganek K-12 school has six portable units on its property. Two of the portables are classroom
relocatable units that house the kindergarten and preschool classes. The remaining four portable units
serve as housing units for the teachers at the school. Two of the housing portables are constructed as
duplex units, each containing two separate living apartments. These units include Housing #1, Housing
#2, Housing #3, and Housing #4. The remaining two portables are single residence housing. The housing
units are occupied from 5pm to 7am and the class relocatable units are occupied from 7am to 5pm.
VI.I Portables Architectural Description
The portables have above grade floors resting on sleepers. Plywood skirting, insulated with 2 in of blue
board rigid insulation, protects the sleepers and floor construction from weather. The floor construction is
plywood flooring resting on 2x8 wood joists and is insulated with 2 in of blue board rigid insulation for
an equivalent R-value of R-22.4. One portable typically has 1,375 sq ft of floor area.
The portables are covered by cold roofs, with shingles covering plywood decking. It is estimated that the
roof insulation is R-13 fiberglass batt insulation for an equivalent R-value of R-14.6. One portable
typically has 1,944 sq ft of roof area.
The typical portable window is comprised of a single pane of glass with wood framing and has an
estimated R-value of R-1.1. The typical portable has approximately 112 sf of window area. There is
typically one metal door per portable, with estimated insulation values of R-1.7.
VI.II Portables Mechanical Description
All portables are heated using hydronic perimeter baseboards as well as a hydronic unit heater located in
the crawlspace area. The two classroom relocatable units, as well as Housing #1 and Housing #2, obtain
heat from the school’s boiler system via a buried arctic pipe, which is then supplied to a Weil-McLain
indirect water heater for the domestic hot water. The remainder of the housing portables are connected to
a centrally located 35,000 BTU/hr oil-fired boiler which provides heat for the perimeter baseboards, the
hydronic unit heater in the crawlspace, and the Weil-McLain indirect water heater in each portable.
VI.III Portables Electrical Description
The separately metered portables electrical systems were not part of this project.
Due to the fact that the six on-site portables have similar building envelope construction and
heating equipment, only one AkWarm model was created to model one portable building. The
results and recommended ECMs generated by this single portable AkWarm model should be applied to
all portable buildings.
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VII. Historic Energy Consumption and Cost
Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and fuel oil gas
energy usage for the surveyed facility from January 2009 through December 2010. New Koliganek
Village Council NKVC provides the electricity and Delta Western provides the fuel oil to the building.
Both utilities bill under their commercial rate schedules.
VII.I Electrical Consumption Data
The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage
charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the
customer's usage as measured in kilowatt-hours (kWh). The usage (kWh) is determined by load wattage
divided by 1,000, times hours running. For example, a 1,000 watt load operating for one hour will use 1
kWh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp operating for
10 hours. One kWh is equivalent to 3,413 BTU. Utility data used in this report reflects the historical data
provided for the building in a summarized format. The actual utility bills were not provided to be able to
verify the data received to assure 100 percent accuracy of the data.
VII.II Fuel Oil Consumption Data
The fuel oil supplier measures consumption and bills in gallons of fuel oil. The average heating value of
fuel oil is 132,000 BTUs per gallon. Fuel oil is sold to the customer in units of gallons which is equal to
approximately 1.32 Therms of energy, or 132,000 BTUs.
Oil is delivered and invoiced once annually. Ideally, the storage tanks are "topped off" but in reality the
amount purchased can be influenced by school district budgets. Correlation to the invoices assumes that
the annual expenditure is equal to one year's usage.
VII.III Overall Consumption Data
The overall cost for energy use is calculated by dividing the total cost by the total usage. Based on the
electric and fuel oil utility data provided, the average cost for the energy and consumption at the surveyed
facility are summarized in the table below. See Appendix A for actual data and averaging methodology.
Energy Cost and Consumption Data
2009 2010 Average
Electric Rate $0.50 /kWh $0.50 /kWh $0.50 /kWh
Oil Rate $5.55 / Gal $3.99/ Gal $4.77 /Gal
Total Cost $236,297 $198,420 $217,358
ECI $10.57 /sf $8.87 /sf $9.72 /sf
Electric EUI 23.3 kBtu/sf 24.8 kBtu/sf 24.1 kBtu/sf
Oil EUI 169.4 kBtu/sf 173.3 kBtu/sf 171.4 kBtu/sf
Building EUI 192.7 kBtu/sf 198.1 kBtu/sf 195.4 kBtu/sf
The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The
building square footage was calculated to be approximately 22,391 sf. This square footage includes the
school, Housing Unit #1, Housing Unit #2, and the relocatable classroom units.
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The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kBtu/sf) and can be
used to compare energy consumption of similar building types or to track consumption from year to year
in the same building. The EUI is calculated by converting annual consumption of all fuels to Btu’s and
then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator of
the relative potential for energy savings. A comparatively low EUI indicates less potential for large
energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to
calculate and verify the gross area of the facility. The gross area was confirmed on the physical site
investigation.
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VIII. Equipment Inventory and Photo Survey
Following the completion of the field survey a detailed equipment list was created and is attached as
Appendix C. The major equipment listed are considered to be the major energy consuming equipment in
the building whose replacement could yield substantial energy savings.
An approximate age was assigned to the equipment if a manufactures date was not shown on the
equipment’s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37,
Table 4, the service life for the equipment along with the remaining useful life in accordance to the
ASHRAE standard are also noted in the equipment list.
Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an
indication that maintenance costs are likely on the rise and more efficient replacement equipment is
available which will lower the operating costs of the unit. Maintenance costs should also fall with the
replacement.
Additionally, photos of various equipment and the building construction were taken during the site visit.
Several photos are included in Appendix E.
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IX. Energy Conservation Measures
IX.I School ECMs
ECM-0 – Replace Refrigerators Older than 5 years Old
Annual Energy Savings Installed Cost SIR Payback (years)
---<10 years
Due to recent advances in refrigerators in the last 5 years, new Energy Star refrigerators are significantly
more efficient than previous models. Replacing existing refrigerators, which are older than 5 years old,
with new energy star models will typically have paybacks of less than 10 years.
ECM #KS-1 – Setback Thermostat for Gymnasium
Annual Energy Savings Installed Cost SIR Payback (years)
$3,247 $400 121.82 0.1
Significant energy savings exist by reducing the room temperature of the gymnasium area during
unoccupied times. By reducing the temperature of the gymnasium space to 60°F during unoccupied times,
the heating load required by the space will be reduced. In order to utilize a setback thermostat, the
hydronic heating coil located in AHU-2, will need an automatic thermostat control as it can only be
manually controlled at this time. See item 1 in Appendix D for more information.
ECM #KS-2 – Setback Thermostat for Relocatable Classrooms
Annual Energy Savings Installed Cost SIR Payback (years)
$4,790 $800 89.87 0.2
Significant energy savings exist by reducing the room temperature of the relocatable classroom areas
during unoccupied times. By reducing the temperature of these spaces to 60°F during unoccupied times,
the heating load required by the space will be reduced. In order to utilize the setback thermostats, the
hydronic baseboards in the spaces will need automatic thermostat control as they can only be manually
controlled at this time. See item 2 in Appendix D for more information.
ECM #KS-3 – Setback Thermostat for Classrooms and Offices
Annual Energy Savings Installed Cost SIR Payback (years)
$14,149 $5,600 37.92 0.4
Significant energy savings exist by reducing the room temperature of the classroom and office areas
during unoccupied times. By reducing the temperature of these spaces to 60F during unoccupied times,
the heating load required by the space will be reduced. In order to utilize the setback thermostats, the
heating coils in AHU-1 and AHU-3 will need an automatic thermostat control as they can only be
manually controlled at this time. See item 7 in Appendix D for more information.
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ECM #KS-4 – Upgrade the Lighting and Control Systems in the Classrooms, Offices, and Teachers
Lounge
Annual Energy Savings Installed Cost SIR Payback (years)
$26,653 $28,800 14.25 1.1
The lighting in the classrooms, teachers lounge, and offices is provided by 4' surface mounted wrap
around, and 2' x 4' recessed troffer light fixtures that are equipped with a mixture of both T12 and T8
lamps with both electronic and magnetic ballasts. All of these light fixtures are controlled via wall
switches. In the office areas a single switch controls several offices. If all of the light fixtures are
upgraded or replaced and provided with T8 lamps with program start electronic ballasts occupancy
sensors could be used to control the lights in all of the rooms.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AKWarm modeling software the different lighting
configurations were modeled separately. See items 3, 5, 6, 8, 10, 13, and 24 in Appendix D for details of
individual measures.
ECM #KS-5 – Upgrade the Lighting and Control Systems in the Restrooms
Annual Energy Savings Installed Cost SIR Payback (years)
$1,990 $2,400 12.76 1.2
There are several restrooms in the school that are illuminated illuminated by 4' fluorescent T12 and T8
lamps and controlled by manual wall mounted rocker switches. It is recommended to replace the
approximately eight fluorescent T12 light fixtures one for one with T8 light fixtures and to install
occupancy sensors in all restrooms.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AKWarm modeling software the different lighting
configurations were modeled separately. See items 9 and 11 in Appendix D for details of individual
measures.
ECM #KS-6 – Upgrade the Lighting in the Corridors
Annual Energy Savings Installed Cost SIR Payback (years)
$2,209 $5,400 6.36 2.4
The corridors and stairways in the school building are illuminated by incandescent, and 4' fluorescent
Light fixtures. The fluorescent light fixtures are equipped with T8 and T12 lamps with both electronic and
magnetic ballasts. CEI recommends that the approximately 25 T12 fluorescent light fixtures are replaced
one for one with T8 light fixtures with electronic ballasts, the five magnetic T8 ballasts are replaced with
electronic ballasts, and that the two incandescent light fixtures are re-lamped with CFL or LED lamps.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AKWarm modeling software the different lighting
configurations were modeled separately. See items 4, 12, and 14 in Appendix D for details of individual
measures.
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ECM #KS-7 – Upgrade the Lighting in the Shop Class
Annual Energy Savings Installed Cost SIR Payback (years)
$1,021 $3,600 4.37 3.5
The shop class is illuminated with T12 fluorescent light fixtures with magnetic ballasts, and controlled by
a manual wall mounted rocker switch. Replacing these light fixtures with T8 fixtures equipped with
electronic ballasts will result in significant savings. It is not recommended that occupancy sensor control
is provided in this space due to the hazards posed by nuisance switching. See item 15 in Appendix D for
more information.
ECM #KS-8 – Upgrade the Lighting and Control Systems in the Gym and Gym Storage
Annual Energy Savings Installed Cost SIR Payback (years)
$6,804 $24,600 4.26 3.6
The gymnasium is currently illuminated by approximately 20 250W Mercury Vapor light fixtures. These
fixtures are not compatible with occupancy sensors because of a long start time, and ballasts have not
been available in the US since 2008. Replacing the existing light fixtures with six-lamp T5HO light
fixtures with occupancy sensor control, and multi level switching, would provide significant energy
savings. The lighting in the gym is far below the levels suggested by the IESNA lighting levels for this
type of space, but the proposed upgrade would greatly improve the performance of the gym.
The gym storage area is illuminated by fluorescent T12 lamps with magnetic ballasts. The existing light
fixtures are controlled by a wall mounted rocker switch Upgrading this area with T8 lamps and a ceiling
mounted occupancy sensor control would result in significant energy savings.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AKWarm modeling software the different lighting
configurations were modeled separately. See items 16 and 22 in Appendix D for details of individual
measures.
ECM#KS-9 – Replace Boilers with Higher Efficiency Boilers
Annual Energy Savings Installed Cost SIR Payback (years)
$8,273 $62,100 2.53 7.5
The two fuel oil boilers currently installed in the school are not energy efficient. One of the boilers, B-1,
has exceeded the useful life of a typical boiler. The other boiler, B-2, appears to be in disrepair. By
installing new boilers, the amount of fuel oil used will be reduced. See item 18 in Appendix D for details
of individual measures.
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ECM #KS-10 – Upgrade the Exterior Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$1,478 $7,000 3.25 4.7
There are approximately five HPS wall pack, and two HPS canopy light fixtures lighting the exterior of
the school building. These light fixtures should be replaced with LED source wall pack and canopy
fixtures which will result in significant energy savings.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AKWarm modeling software the different lighting
configurations were modeled separately. See items 19 and 20 in Appendix D for details of individual
measures.
ECM #KS-11 – Upgrade the Lighting in the Kitchen, Cafeteria, and Pantry
Annual Energy Savings Installed Cost SIR Payback (years)
$702 $3,400 3.17 4.8
The kitchen, cafeteria, and pantry are all illuminated by 4' fluorescent T12 light fixtures with magnetic
ballasts. These light fixtures should be retrofitted with T8 lamps and be equipped with electronic ballasts.
Additionally occupancy sensor control may be provided in the kitchen pantry, however it is not
recommended to provide occupancy sensor control of the kitchen due to hazards posed by nuisance
switching, and the cafeteria would be a difficult space to control with occupancy sensors.
This description is for a compilation of several ECM’s that are intended to be implemented at the same
time, however due to constraints with the AkWarm modeling software the different lighting
configurations were modeled separately. See items 17, 25, and 29 in Appendix D for details of individual
measures.
ECM #KS-12 – Install Insulation in the Cathedral Ceiling
Annual Energy Savings Installed Cost SIR Payback (years)
$627 $6,300 2.68 10
Since the roof construction could not be verified during the site visit, it was assumed that the roof
insulation was similar to the wall insulation and was original to the school. By increasing the overall R-
value of the roofing system, the conductive heat loss through the roofing assembly will be reduced. See
item 23 in Appendix D for more information.
ECM#KS-13 – Replace Exterior Solid Metal Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$467 $4,900 1.86 10.4
The existing solid metal doors have an R-value of R-1.7. By replacing these doors with a better insulated
door, thermal loss through the doors will be reduced. It is recommended that these doors be removed and
replaced with new R-6.25 minimum (U-0.16) insulated doors. See item 26 in Appendix D for more
information.
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ECM#KS-14 – Replace Exterior Quarter Light Metal Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$534 $5,500 1.89 10.2
The existing quarter light metal doors have an R-value of R-1.7. By replacing these doors with a better
insulated door, thermal loss through the doors will be reduced. It is recommended that these doors be
removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. See item 27 in Appendix D
for more information.
ECM#KS-15 – Air Tightening
Annual Energy Savings Installed Cost SIR Payback (years)
$10,328 $75,000 1.42 7.3
By tightening the building envelope with air sealing improvements, infiltration into the building will be
reduced. This in turn will reduce the heating load required by the building and reduce the amount of fuel
oil being burned by the boilers. While a blower door test was not completed, it is anticipated that air
leakage is occurring though old weather stripping around doors, window frames, and wall and roof
penetrations. Methods to decrease the infiltration into the building include: sealing around the windows
and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all
exterior cover plates and sealing all roof and wall penetrations. To achieve a viable economic benefit,
$75,000 can be invested and still achieve an SIR ≥ 1by reducing air leakage by 20%. See item 28 in
Appendix D for more information.
IX.II Portables ECMs
There are six portable buildings that exist on-site. The two class relocatable buildings and the portable
housing units #1 and #2 are connected to the school’s boiler system and have been modeled with the
school’s heating system. The remaining portable housing units are heated by a standalone, central boiler.
A typical AkWarm model was created to model the typical portable, due to similarities in construction
type and heating systems. The following ECM savings and installed costs are for one portable
building. Multiply the results, except ECM #PB-1, by six to obtain savings and costs for the portables.
ECM #PB-1 is applicable to three of the relocatable housing units; the remaining three relocatable units
were modeled in ECM #KS-2 above. See Appendix F for more information.
ECM #PB-1 – Setback Thermostat
Annual Energy Savings Installed Cost SIR Payback (years)
$1,174 $500 35.24 0.4
Significant energy savings exist by reducing the room temperature of the portable buildings during
unoccupied times. By reducing the temperature of the gymnasium space to 60F during unoccupied times,
the heating load required by the space will be reduced.
ECM#PB-2 – Replace Exterior Solid Metal Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$63 $600 2.79 9.6
The existing solid metal doors have an R-value of R-1.7. By replacing these doors with a better insulated
door, thermal loss through the doors will be reduced. It is recommended that these doors be removed and
replaced with new R-6.25 minimum (U-0.16) insulated doors.
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ECM #PB-3 – Seal Building Envelope and Reduce Infiltration by 30%
Annual Energy Savings Installed Cost SIR Payback (years)
$195 $1,500 1.34 7.7
By tightening the building envelope with air sealing improvements, infiltration into the building will be
reduced. This in turn will reduce the heating load required by the building and reduce the amount of fuel
oil being used by the boiler. Reducing infiltration by air sealing the building envelope will produce
energy savings. While a blower door test was not completed, it is anticipated that air leakage is occurring
around old weather stripping around doors, window frames, through the crawlspace, and wall and roof
penetrations. Methods to decrease the infiltration into the building include: sealing around the windows
and doors with caulking and insulation, adding new weather stripping to doors, providing gaskets to all
exterior cover plates and sealing all roof, floor, and wall penetrations. To achieve a viable economic
benefit, $1,500 can be invested and still achieve an SIR ≥ 1by reducing air leakage by 30%.
ECM#PB-4 – Replace Single Pane Windows
Annual Energy Savings Installed Cost SIR Payback (years)
$469 $7,300 1.24 15.5
The existing windows in the portable units are single pane, wood framed windows with an R-value of R-
1. By replacing these windows with a better insulated window, thermal loss through the windows will be
reduced. It is recommended that these doors be removed and replaced with new R-4.5 minimum (U-0.22)
insulated vinyl windows.
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Appendix A
Energy Benchmark Data
Koliganek K12 School Draft Energy Audit Report
SW Region School District Regional Education Attendance 05/09/11
REAL Preliminary Benchmark Data Form
PART I – FACILITY INFORMATION
Facility Owner Facility Owned By Date
Building Name/ Identifier Building Usage Building Square Footage
Koliganek School 22,359
Building Type Community Population Year Built
First Name Last Name Middle Name Phone
Rick Dallmann 842-5280
Building Type Community Population Year Built
Mixed 200 1959
Facility Address Facility City Facility Zip
Koliganek 99576
Contact Person
Email
rdallmann@swrsd.orgRickDallmann 842-5280
State Zip
AK 99576
Monday-
Friday
Saturday Sunday Holidays
8 to 5 0 0 0
Average # of
rdallmann@swrsd.org
Mailing Address City
P.O. Box 90 Dillingham
Primary
Operating
Hours
Average # of
Occupants
During
Operating
Hours
76
Renovations/Notes
Date
None
Note: Specific information on drawings is unavailable from facility owner.
Details
What drawings may be available are maintained at the school for maintenance.
PART II – ENERGY SOURCES
1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for
Heating Oil Electricity Natural Gas Propane Wood Coal
$ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton
Other energy
1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for
2. Provide utilities bills for the most recent two-year period for each energy source you use.
Other energy
sources?
Describe
Coffman Engineers, Inc. AkWarm No. BBNCJZZCAEC01
Koliganek K12 School Draft Energy Audit Report
Koliganek
Buiding Size Input (sf) =22,359
2009 Natural Gas Consumption (Therms)
2009 Natural Gas Cost ($)
2009 Electric Consumption (kWh)152,5192009 Electric Consumption (kWh)152,519
2009 Electric Cost ($)77,012
2009 Oil Consumption (Therms)37,884
2009 Oil Cost ($)159,285
2009 Total Energy Use (kBtu)4,308,947
2009 Total Energy Cost ($)236,297
Annual Energy Use Intensity (EUI)Annual Energy Use Intensity (EUI)
2009 Natural Gas (kBtu/sf)
2009 Electricity (kBtu/sf)23.3
2009 Oil (kBtu/sf) 169.4
2009 Energy Utilization Index (kBtu/sf)192.7
Annual Energy Cost Index (ECI)
2009 Natural Gas Cost Index ($/sf)2009 Natural Gas Cost Index ($/sf)
2009 Electric Cost Index ($/sf)3.44
2009 Oil Cost Index ($/sf)7.12
2009 Energy Cost Index ($/sf)10.57
2010 Natural Gas Consumption (Therms)
2010 Natural Gas Cost ($)
2010 Electric Consumption (kWh)162,655
2010 Electric Cost ($)81,313
2010 Oil Consumption (Therms)38,742
2010 Oil Cost ($)117,107
2010 Total Energy Use (kBtu)4,429,342
2010 Total Energy Cost ($)198,420
Annual Energy Use Intensity (EUI)Annual Energy Use Intensity (EUI)
2010 Natural Gas (kBtu/sf)
2010 Electricity (kBtu/sf)24.8
2010 Oil (kBtu/sf)173.3
2010 Energy Utilization Index (kBtu/sf)198.1
Annual Energy Cost Index (ECI)
2010 Natural Gas Cost Index ($/sf)2010 Natural Gas Cost Index ($/sf)
2010 Electric Cost Index ($/sf)3.64
2010 Oil Cost Index ($/sf)5.24
20010 Energy Cost Index ($/sf)8.87
Note:
1 kWh = 3,413 Btu's1 kWh = 3,413 Btu's
1 Therm = 100,000 Btu's
1 CF ≈ 1,000 Btu's
Coffman Engineers, Inc. AkWarm No. BBNCJZZCAEC01
Koliganek K-12 SchoolDraft Energy Audit ReportKoliganekElectricityBtus/kWh =3,413Provider Customer #Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)NKVC Jan‐09 1/1/2009 1/31/2009 3116,071 549 $8,186 $0.50NKVC Feb‐09 2/1/2009 2/28/2009 2815,049 514 $7,675 $0.50NKVCMar‐09 3/1/2009 3/31/20093114,977511$7,639$0.50NKVCApr‐09 4/1/2009 4/30/20093014,785505$7,543$0.50NKVCMay‐09 5/1/2009 5/31/20093111,645397$5,973$0.50NKVCJun‐09 6/1/2009 6/30/2009307,426253$3,713$0.50NKVCJul‐09 7/1/2009 7/31/2009317,513256$3,757$0.50NKVCAug‐09 8/1/2009 8/31/2009319,705331$4,853$0.50NKVCSep‐09 9/1/2009 9/30/20093012,191416$6,096$0.50NKVCOct‐09 10/1/2009 10/31/20093113,361456$6,681$0.50NKVCNov‐0911/1/200911/30/20093014 874508$7 437$0 50NKVCNov0911/1/200911/30/20093014,874508$7,437$0.50NKVCDec‐09 12/1/2009 12/31/20093114,922509$7,461$0.50NKVCJan‐10 1/1/2010 1/31/20103116,071549$8,036$0.50NKVCFeb‐10 2/1/2010 2/28/20102815,049514$7,525$0.50NKVCMar‐10 3/1/2010 3/31/20103114,977511$7,489$0.50NKVCApr‐10 4/1/2010 4/30/20103014,785505$7,373$0.50NKVCMay‐10 5/1/2010 5/31/20103111,645397$5,823$0.50NKVCJun‐10 6/1/2010 6/30/2010308,525291$4,263$0.50NKVCJul‐10 7/1/2010 7/31/2010317,596259$3,798$0.50NKVCAug‐10 8/1/2010 8/31/20103111,520393$5,760$0.50NKVCSep‐10 9/1/2010 9/30/20103014,691501$7,346$0.50NKVCOct‐10 10/1/2010 10/31/20103116,537564$8,269$0.50NKVCNov‐10 11/1/2010 11/30/20103015,188518$7,595$0.50NKVCDec‐10 12/1/2010 12/31/20103116,071549$8,036$0.50Jan ‐ 09 to Dec ‐ 09 total:152,5195,2050$77,012$0Jan ‐ 10 to Dec ‐ 10 total:162,6555,5510$81,313$0$0 50Jan‐09toDec‐09avg:$0.50$0.50Note:Missing electrical data , colored red in this table, from January to May 2009 and January 2010 was estimated in order to arrive at the averages in this table. To estimate the missing data, values from similar months in other years was used.Jan ‐ 10 to Dec ‐ 10 avg:Jan 09 to Dec 09 avg:Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Koliganek K-12 SchoolDraft Energy Audit Report$9,00018,000Koliganek ‐Electric Consumption (kWh) vs. Electric Cost ($)$6,000$7,000$8,000$9,00012,00014,00016,00018,000$3,000$4,000$5,000,6,0008,00010,000,Electric Cost ($)ric Consumption (kWh)Electric Consumption (kWh)Electric Cost ($)$0$1,000$2,00002,0004,000ElectrDate (Mon ‐Yr)Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Koliganek K-12 SchoolDraft Energy Audit ReportKoliganekOilBtus/Gal =132,000ProviderCustomer#MonthStartDateEndDateBillingDaysConsumption(Gal)Consumption(Therms)DemandUseOilCost($)UnitCost($/Therm)DemandCost($)ProviderCustomer #MonthStart DateEnd DateBilling DaysConsumption (Gal)Consumption (Therms)Demand UseOil Cost ($)Unit Cost ($/Therm)Demand Cost ($)Delta WesternJul‐08 7/1/2008 7/31/2008 31 0 0 $0 0.00Delta WesternAug‐08 8/1/2008 8/31/2008 31 0 0 $0 0.00Delta WesternSep‐08 9/1/2008 9/30/2008 30 0 0 $0 0.00Delta WesternOct‐08 10/1/2008 10/31/2008 31 0 0 $0 0.00Delta WesternNov‐08 11/1/2008 11/30/2008 30 0 0 $0 0.00Delta WesternDec‐08 12/1/2008 12/31/2008 31 0 0 $0 0.00Delta WesternJan‐09 1/1/2009 1/31/2009 31 0 0 $0 0.00Delta WesternFeb‐09 2/1/2009 2/28/2009 28 0 0 $0 0.00Delta WesternMar‐09 3/1/2009 3/31/2009 31 0 0 $0 0.00Delta WesternApr‐09 4/1/2009 4/30/2009 30 0 0 $0 0.00Delta WesternMay‐09 5/1/2009 5/31/2009 31 0 0 $0 0.00Delta WesternJun‐09 6/1/2009 6/30/2009 30 28,700 37,884 $159,285 4.20Delta WesternJul‐09 7/1/2009 7/31/2009 31 0 0 $0 0.00Delta WesternAug‐09 8/1/2009 8/31/2009 31 0 0 $0 0.00Delta WesternSep‐09 9/1/2009 9/30/2009 30 0 0 $0 0.00DeltaWesternOct0910/1/200910/31/20093100$0000Delta WesternOct‐0910/1/200910/31/20093100$00.00Delta WesternNov‐09 11/1/2009 11/30/2009 30 0 0 $0 0.00Delta WesternDec‐09 12/1/2009 12/31/2009 31 0 0 $0 0.00Delta WesternJan‐10 1/1/2010 1/31/2010 31 0 0 $0 0.00Delta WesternFeb‐10 2/1/2010 2/28/2010 28 0 0 $0 0.00Delta WesternMar‐10 3/1/2010 3/31/2010 31 0 0 $0 0.00Delta WesternApr‐10 4/1/2010 4/30/2010 30 0 0 $0 0.00Delta WesternMay‐10 5/1/2010 5/31/2010 31 0 0 $0 0.00Delta WesternJun‐10 6/1/2010 6/30/2010 30 29,350 38,742 $117,107 3.02Jul ‐ 08 to Jun ‐ 09 total:28,700 37,884 0$159,285 $0Jul ‐ 09 to Jun ‐ 10 total:29,350 38,742 0$117,107 $0Jul ‐ 08 to Jun ‐ 09 avg:5.55Jul ‐ 09 to Jun ‐ 10 avg:3.99Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Koliganek K-12 SchoolDraft Energy Audit Report$160 000 00$180,000.00 4000045000Koliganek ‐Oil Consumption (Therms) vs. Oil Cost ($)$120,000.00 $140,000.00 $160,000.00 300003500040000ms)$60 000 00$80,000.00 $100,000.00 150002000025000Oil Cost ($)Oil Consumption (ThermOil Consumption (Therms)Oil Cost ($)$20,000.00 $40,000.00 $60,000.00 50001000015000O$0.00 0Date (Mon ‐Yr)Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Appendix B
AkWarm Commercial Reports
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK SCHOOL ENERGY AUDIT REPORT – PROJECT SUMMARY –
Created 1/27/2012 1:25 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Koliganek K-12 Auditor Company: Coffman Engineers, Inc.
Address: PO Box 5052 Auditor Name: Walter Heins, PE, CxA, CEA
City: Koliganek Auditor Address: 800 F Street
Anchorage, AK 99501
Client Name: Rick Dallmann
Client Address: P.O. Box
Dillingham, AK 99576
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 842-5280 Auditor Comment:
Client FAX:
Design Data
Building Area: 22,039 square feet Design Heating Load: Design Loss at Space:
874,999 Btu/hour
with Distribution Losses: 921,052 Btu/hour
Plant Input Rating assuming 82.0% Plant
Efficiency and 25% Safety Margin: 1,404,042
Btu/hour
Note: Additional Capacity should be added for
DHW load, if served.
Typical Occupancy: 76 people Design Indoor Temperature: 67.4 deg F
(building average)
Actual City: Koliganek Design Outdoor Temperature: -19.3 deg F
Weather/Fuel City: Koliganek Heating Degree Days: 11,306 deg F-days
Utility Information
Electric Utility: Koliganek Village Council -
Commercial - Sm
Natural Gas Provider: None
Average Annual Cost/kWh: $0.500/kWh Average Annual Cost/ccf: $0.000/ccf
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 Annual Energy Cost Estimate Description Htg Cooling Dom Hot Wtr Lighting Other Electrical Cooking Clothes Drying Vent Fans Service Fees Total Cost Existing Building $134,290 $0 $5,394 $66,946 $10,655 $0 $0 $5,167 $0$222,452 With Proposed Retrofits $85,499 $0 $7,235 $25,920 $10,655 $0 $0 $5,167 $0$134,477 SAVINGS $48,791 $0 -$1,841 $41,026 $0 $0 $0$0 $0$87,976
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 $0$50,000$100,000$150,000$200,000$250,000Existing Retrofit#1 OilElectricityAnnual Energy Costs by Fuel
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 Annual Electrical Usage By Month
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 Annual Fuel Oil #1 Usage By Month
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Appendix C
Major Equipment List
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITYEFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES B‐1 BOILER RM BUILDING HEATING BURNHAM BURNHAM PF‐505 CAST IRON FUEL OIL #1 786 MBH ≈ 75% 30 0 ‐ B‐2 BOILER RM BUILDING HEATING BURNHAM BURNHAM KV907WML CAST IRON FUEL OIL #1 834 MBH ≈ 75% 30 20 ‐ B‐3 DETACHED BOILER HOUSING HEATING WEIL MCLAIN UNKNOWN ‐ FUEL OIL #1 35 MBH ≈ 85% 30 AGE UNKNOWN ‐ PMP‐1 BOILER RM HEATING WATER CIRC GRUNDFOS UP 40‐40/4F INLINE 50 GPM 15' NEMA STANDARD 1/3 10 0 ‐ CP‐1 BOILER RM HEATING WATER CIRC GRUNDFOS UMC 50‐80 INLINE 40GPM 15' NEMA STANDARD 3/4 10 0 ‐ CP‐2 BOILER RM HEATING WATER CIRC GE 5KH38PN1197 INLINE 40GPM 15' NEMA STANDARD 1/2 10 0 ‐ CP‐3 BOILER RM HEATING WATER CIRC GRUNDFOS UPS 40‐80/4F INLINE 40GPM 15' NEMA STANDARD 3/4 10 0 ‐ CP‐44 DOWNSTAIRS BOILER RM HEATING WATER CIRC GRUNDFOS UMS 40‐40 INLINE 50 GPM 15' NEMA STANDARD 1/3 10 0 ‐ CP‐54 DOWNSTAIRS BOILER RM HEATING WATER CIRC GRUNDFOS UMS 40‐40 INLINE 50 GPM 15' NEMA STANDARD 1/3 10 0 ‐
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITYEFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES CP‐64 DOWNSTAIRS BOILER RM HEATING WATER CIRC GRUNDFOS UMS 40‐40 INLINE 50GPM 15' NEMA STANDARD 1/3 10 0 ‐ CP‐74 DOWNSTAIRS BOILER RM HEATING WATER CIRC GRUNDFOS UP 26‐64F INLINE NEMA STANDARD 1/4 10 0 ‐ CWP‐14 DOWNSTAIRS BOILER RM BUILDING WATER GOULD ‐ INLINE 60GPM NEMA STANDARD 1.5 10 0 ‐ HCP‐14 DOWNSTAIRS BOILER RM DOMESTIC WATER CIRC GRUNDFOS UMS 50‐40 INLINE 40GPM 15' NEMA STANDARD 1/2.5 10 0 ‐ HCP‐24 BOILER RM DOMESTIC WATER CIRC GRUNDFOS ‐ INLINE NEMA STANDARD 1/2.5 10 0 ‐ AHU‐1 201 FAN RM SCHOOL CARRIER 39BA060B20 PACKAGED 3400 CFM NEMA STANDARD 2 25 Age Unknown ‐ AHU‐2 201 FAN RM GYM CARRIER 39BA060B10 PACKAGED 3400 CFM NEMA STANDARD 2 25 Age Unknown ‐ AHU‐3 SHOP FAN ROOM SHOP TRANE TORRIVENT TVDB0GAE0C3NCR04 CABINET 1700 CFM NEMA STANDARD 1 25 Age Unknown ‐
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITYEFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE ESTIMATED REMAINING USEFUL LIFE NOTES EF‐2 201 FAN RM GYM EXHAUST GREENHECK SQB 18‐7 INLINE NEMA STANDARD 1/2 25 Age Unknown ‐ EF‐34 ‐ GYM TOILET EXHAUST CARNES AMDAM2 CENTRIFUGAL≈300 CFM NEMA STANDARD 1/2 25 Age Unknown ‐ EF‐44 ‐ TOILET EXHAUST ‐ ‐ CENTRIFUGAL≈450 CFM NEMA STANDARD 1/2 25 Age Unknown ‐ 4 During the site visit the existing mechanical unit was not named or numbered. In this table, the unit is numbered for organizational purposes only, and may not correspond to nomenclature used in the past.
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Appendix D
Energy Conservation Measures
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK SCHOOL PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION
MEASURES
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
0a Refrigerators Replace Refrigerators older
than 5 years old
- - - <10 years
1 Setback
Thermostat:
Gymnasium
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gymnasium space.
$3,246 $400 121.81 0.1
2 Setback
Thermostat:
Outbuildings
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Outbuildings space.
$4,790 $800 89.87 0.2
3 Lighting:
Classrooms and
Offices
Add new Occupancy
Sensor
$3,428 $600 87.93 0.2
4 Lighting: Corridors Replace with 2 FLUOR (2)
CFL, Spiral 23 W
$514 $100 79.16 0.2
5 Lighting:
Classrooms and
Offices
Add new Occupancy
Sensor
$53 $16 51.09 0.3
6 Lighting:
Classrooms and
Offices
Add new Occupancy
Sensor
$451 $157 44.22 0.3
7 Setback
Thermostat:
Classrooms/Offices
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Classrooms/Offices
space.
$14,148 $5,600 37.92 0.4
8 Lighting:
Classrooms and
Offices
Replace with 86 FLUOR
(4) T8 4' F32T8 32W
Standard (2) Program
StdElectronic and Add new
Occupancy Sensor
$17,518 $17,690 15.24 1
9 Lighting:
Restrooms
Replace with 8 FLUOR (4)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
and Add new Occupancy
Sensor
$1,774 $2,000 13.65 1.1
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK SCHOOL PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION
MEASURES
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
10 Lighting: Teachers
Lounge
Replace with 4 FLUOR (4)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
and Add new Occupancy
Sensor
$815 $1,000 12.54 1.2
11 Lighting:
Restrooms
Add new Occupancy
Sensor
$216 $400 8.33 1.8
12 Lighting: Corridors Replace with 5 FLUOR (4)
T8 4' F32T8 32W Standard
Program StdElectronic
$119 $250 7.34 2.1
13 Lighting:
Classrooms and
Offices
Replace with 43 FLUOR
(2) T8 4' F32T8 32W
Standard Program
StdElectronic and Add new
Occupancy Sensor
$4,380 $9,275 7.27 2.1
14 Lighting: Corridors Replace with 25 FLUOR
(2) T8 4' F32T8 32W
Standard Program
StdElectronic
$1,576 $5,000 4.85 3.2
15 Lighting: Shop
Class
Replace with 18 FLUOR
(2) T8 4' F32T8 32W
Standard Program
StdElectronic
$1,021 $3,600 4.37 3.5
16 Lighting: Gym
Lighting
Replace with 20 FLUOR
(6) T5 45.2" F54W/T5 HO
Standard (2) StdElectronic
and Add new Occupancy
Sensor, Multi-Level
Switch
$6,623 $23,600 4.32 3.6
17 Lighting: Kitchen
and Cafeteria
Replace with 10 FLUOR
(4) T8 4' F32T8 32W
Standard (2) Program
StdElectronic
$534 $2,000 4.11 3.7
18 HVAC And DHW Replace boilers $11,292 $62,100 3.47 5.5
19 Lighting: Exterior
Lighting
Replace with 5 LED 72W
Module StdElectronic
$1,056 $5,000 3.25 4.7
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK SCHOOL PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION
MEASURES
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
20 Lighting: Exterior
Lighting
Replace with 2 LED 72W
Module StdElectronic
$422 $2,000 3.25 4.7
21 Lighting: Storage
and Utility
Replace with 3 FLUOR (2)
CFL, Spiral 23 W
$29 $150 2.97 5.2
22 Lighting: Gym
Storage
Replace with 4 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic and
Add new Occupancy
Sensor
$181 $1,000 2.79 5.5
23 Cathedral Ceiling:
School
Add R-11 to existing
insulation.
$627 $6,294 2.68 10
24 Lighting:
Classrooms and
Offices
Replace with FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$8 $50 2.48 6.2
25 Lighting: Kitchen
and Cafeteria
Replace with 5 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$134 $1,000 2.06 7.5
26 Exterior Door:
Solid Doors
Remove existing door and
install U-0.16 fiberglass
door with polyurethane
core
$467 $4,845 1.86 10.4
27 Exterior Door:
Quarter Light
Doors
Remove existing door and
install U-0.16 fiberglass
door with polyurethane
core
$535 $5,451 1.89 10.2
28 Air Tightening Perform air sealing to
reduce air leakage by 20%.
$10,328 $75,000 1.42 7.3
29 Lighting: Kitchen
Pantry
Replace with FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic and
Add new Occupancy
Sensor
$34 $400 1.29 11.9
30 Lighting: Storage
and Utility
Replace with 25 FLUOR
(2) T8 4' F32T8 32W
Standard Program
StdElectronic
$123 $5,000 0.38 40.6
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK SCHOOL PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION
MEASURES
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
31 Window/Skylight:
Double Pane
Windows
Replace existing windows
with Low E/argon
fiberglass or insulated
vinyl windows
$1,028 $72,269 0.27 70.3
32 Lighting: Storage
and Utility
Replace with 5 FLUOR T8
4' F32T8 32W Standard
Instant StdElectronic
$16 $1,000 0.25 61.4
33 Above-Grade Wall:
School, Gym, and
Relocated Bldgs
Remove old insulation and
install R-21 fiberglass batts
in 2x6 wall.
$477 $63,618 0.20 133.3
34 Garage Door:
Garage Door
Replace existing garage
door with R-7, 2"
polyurethane core
replacement door.
$12 $1,574 0.20 134
TOTAL $87,976 $379,240 3.57 4.3
Note:
a Due to advances in refrigerators in the previous 5 years, new Energy Star refrigerators are much more efficient and result in
viable energy savings.
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Appendix E
Site Visit Photos
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
1. Southeast Side of School
2. Fresh Air Intake and Exhaust Hoods 3. Shop Area
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
4. Northeast Side of School 5. AHU-3
6. WH-1and HCP-1 7. CWP-1 and Expansion Tanks
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
8. Boilers B-1 and B-2 9. B-1, WH-2, and Exhaust Flue for B-1 & B-2
10. AHU-1 and AHU-2 11. AHU-2
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
12. CP-1 through CP-3, PMP-1 13. CP-4 through CP-7
14. Housing #1 and Housing #2 15. Class Relocatables to left, Housing #4 & #5
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
Appendix F
AkWarm Model of Portable Building
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK PORTABLE UNIT ENERGY AUDIT REPORT –
PROJECT SUMMARY – Created 11/11/2011 2:34 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Koliganek School- Portable Building Auditor Company: Coffman Engineers, Inc.
Address: PO Box 30 Auditor Name: Walter Heins, PE, CCP, CxA,
CEA
City: Koliganek Auditor Address: 800 F Street
Anchorage, AK 99501
Anchorage, AK 99501
Client Name: Rick Dallmann
Client Address: PO Box 90
Dillingham, AK 99576
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 842-5280 Auditor Comment:
Client FAX:
Design Data
Building Area: 1,375 square feet Design Heating Load: Design Loss at Space:
41,577 Btu/hour
with Distribution Losses: 43,765 Btu/hour
Plant Input Rating assuming 82.0% Plant
Efficiency and 25% Safety Margin: 66,715
Btu/hour
Note: Additional Capacity should be added for
DHW load, if served.
Typical Occupancy: 4 people Design Indoor Temperature: 70 deg F (building
average)
Actual City: Koliganek Design Outdoor Temperature: -19.3 deg F
Weather/Fuel City: Koliganek Heating Degree Days: 11,306 deg F-days
Utility Information
Electric Utility: Koliganek Village Council -
Commercial - Sm
Natural Gas Provider: None
Average Annual Cost/kWh: $0.000/kWh Average Annual Cost/ccf: $0.000/ccf
Annual Energy Cost Estimate
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 Description Htg Cooling Dom Hot Wtr Lighting Other Electrical Cooking Clothes Drying Vent Fans Service Fees Total Cost Existing Building $5,768 $0 $2,181 $0 $0 $0 $0 $0 $0 $7,949 With Proposed Retrofits $3,096 $0 $2,206 $0 $0 $0 $0 $0 $0 $5,302 SAVINGS $2,671 $0 -$25 $0 $0 $0 $0 $0 $0 $2,646
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 $0$2,000$4,000$6,000$8,000Existing Retrofit#1 OilElectricityAnnual Energy Costs by Fuel
Koliganek K-12 School Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01 Annual Fuel Oil #1 Usage By Month
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
KOLIGANEK PORTABLE UNIT PRIORITY LIST – RECOMMENDED ENERGY CONSERVATION
MEASURES
Rank Feature Recommendation Annual
Energy
Savings
Installed
Cost
SIR Payback
(Years)
0a Refrigerators Replace Refrigerators older
than 5 years old
- - - <10 years
1 Setback
Thermostat:
Portable Building
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Portable Building
space.
$1,173 $500 35.21 0.4
2 Exterior Door:
Portable Building -
Doors
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$63 $606 2.79 9.7
3 Air Tightening Perform air sealing to
reduce air leakage by 30%.
$195 $1,500 1.34 7.7
4 Window/Skylight:
Portable Building -
Single Pane
Windows
Replace existing window
with U-0.22 vinyl window
$470 $7,289 1.24 15.5
5 Above-Grade Wall:
Portable Building -
2x4 Stud Wall
Install R-20 rigid foam
board to exterior and cover
with T1-11 siding or
equivalent.
$745 $21,885 0.92 29.4
TOTAL $2,646 $31,780 1.59 12
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R-Value Recommendation
Type/R-Value
Installed
Cost
Annual
Energy
Savings
5 Above-Grade Wall:
Portable Building -
2x4 Stud Wall
Wall Type: Single Stud
Siding Configuration: Just
Siding
Insul. Sheathing: None
Structural Wall: 2 x 4, 16
inches on center
R-13 Batt:FG or RW, 3.5
inches
Window and door headers:
Not Insulated
Modeled R-Value: 11.4
Install R-20 rigid
foam board to
exterior and
cover with T1-11
siding or
equivalent.
$21,885 $745
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
2 Exterior Door:
Portable Building -
Doors
Door Type: Metal -
fiberglass or mineral wool
Modeled R-Value: 1.7
Remove existing
door and install
standard pre-
hung U-0.16
insulated door,
including
hardware.
$606 $63
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Koliganek K-12 School Draft Energy Audit Report
Coffman Engineers, Inc. AkWarm No. BBNC-JZZ-CAEC-01
4 Window/Skylight:
Portable Building -
Single Pane
Windows
Glass: Single, Glass
Frame: Wood\Vinyl
Spacing Between Layers:
Quarter Inch
Gas Fill Type: Air
Modeled U-Value: 0.94
Solar Heat Gain
Coefficient including
Window Coverings: 0.52
Replace existing
window with U-
0.22 vinyl
window
$7,289 $470
Air Leakage
Rank Location Estimated Air Leakage Recommended
Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
3 Air Tightness estimated as:
1146 cfm at 75 Pascals
Perform air
sealing to reduce
air leakage by
30%.
$1,500 $195