HomeMy WebLinkAboutBSSD-SKK-RSA Shaktoolik School 2012-EERichard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
Shaktoolik K12 School
Shaktoolik, Alaska
Project # BSSDSKKRSA01
Prepared for:
Bering Strait School District
Contact: Richard Ried, Maintenance Supervisor
Phone: 9076244249
Unalakleet, Alaska
April 9, 2012
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C$6
Anchorage, AK 99501
and
RSA Engineering, Inc.
2422 Arctic Blvd., Suite 200
Anchorage, AK 99503
Shaktoolik K-12 School Comprehensive Energy Audit
2
TABLE OF CONTENTS
1. Report Disclaimers 3
2. Executive Summary 4
3. Audit and Analysis Background 8
4. Acknowledgements 10
5. Building Description & Function 11
6. Historic Energy Consumption 14
7. Energy Efficiency Measures Considered or Recommended 14
8. Interactive Effects of Projects 20
9. Loan Program 20
Appendix A: Photos 22
Appendix B: AkWarm7C Report 34
Appendix C: Building Schedules and Plans 47
Performed by: ___________________________
Adam W. Wilson, PE, CEA
CEA # 1618
RSA Engineering, Inc.
Reviewed by: ___________________________
Richard Armstrong, PE, CEM
CEA #178, CEM # 13557
Shaktoolik K-12 School Comprehensive Energy Audit
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1. REPORT DISCLAIMERS
The information contained in this report, including any attachments, is
intended solely for use by the building owner and the AHFC. No others
are authorized to disclose, copy, distribute or retain this report, in whole or
part, without written authorization from Richard S. Armstrong, PE, LLC,
2321 Merrill Field Drive, C$6, Anchorage, AK 99501. Additionally, this
report contains recommendations that, in the opinion of the auditor, will
cause the owner to realize energy savings over time. All
recommendations must be designed by a registered engineer, licensed in
the State of Alaska, in the appropriate discipline. Lighting
recommendations should all be first reviewed by running a lighting
analysis to assure that the recommended lighting upgrades will comply
with State of Alaska Statue as well as IES recommendations.
Payback periods may well vary from those forecast due to the uncertainty
of the final installed design, configuration, equipment selected, and
installation costs of recommended Energy Efficiency Measures (EEMs), or
the operating schedules and maintenance provided by the owner.
Furthermore, EEMs are typically interactive, so implementation of one
EEM may impact the cost savings from another EEM. Neither the auditor,
Richard S. Armstrong, PE, LLC, AHFC, or others involved in preparation of
this report will accept liability for financial loss due to EEMs that fail to
meet the forecasted payback periods.
This audit meets the criteria of an Investment Grade Audit (IGA) per the
Association of Energy Engineers definition, and is valid for one year. The
life of the IGA may be extended on a case$by$case basis, at the discretion
of the AHFC.
IGSs are the property of the State, and may be incorporated into AkWarm$
C, the Alaska Energy Data Inventory (ARIS), or other state and/or public
information system.
Shaktoolik K-12 School Comprehensive Energy Audit
4
Investment Grade Energy Audit
Shaktoolik K12 School
2. Executive Summary:
The Shaktoolik K$12 School was constructed in 1980. It is owned
and operated by the Bering Strait School District (BSSD). The
school will be remodeled starting in the summer of 2012, with
completion expected at the end of 2013. Recommendations made in
this report may or may not be necessary or appropriate depending
on the result of the remodel. It is assumed that all new construction
and equipment will be provided in accordance with current codes,
which will significantly increase the overall building energy efficiency
from the original school construction. This audit will serve as an
energy benchmark against which the new building can be compared
if the owner so chooses. Current benchmark energy use data
collected for this building is presented in Table 1 below:
Table 1
2009 2009 2010 2010
Utility Consumption Cost/Year Consumption Cost/Year
Electricity$kWh 120,804 $ 73,068 65,377 $ 55,452
No. 2 Fuel Oil $
Gallons
11,477 $ 47,667 5,553 $ 17,352
Ttl Energy Costs $120,735 $ 72,804
A benchmark measure of energy use relative to other similar function
buildings in the area is the Energy Use Index (EUI), which takes the
total annual energy used by the facility divided by the square footage
area of the building, for a value expressed in terms of kBTU/SF.
This number can then be compared to other buildings to see if it is
about average, higher or lower than similar buildings in the area.
Likewise, the Energy Cost Index (ECI) is the cost of all energy used
by the building expressed in $/SF of building area. The comparative
values for the subject building are listed in Table 2 below:
Shaktoolik K-12 School Comprehensive Energy Audit
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Table 2
Shaktoolik
K$12 School
Unalakleet
Elementary & High
Schools (neighboring
village)
Average for
All BSSD
Schools
Energy Use Index (EUI)
kBTU/SF Avg 2009, 2010
87.8 106.2 125.3
Energy Cost Index (ECI)
Average 2009, 2010
$5.89 $4.84 $6.73
Various Energy Efficiency Measures (EEMs) have been analyzed for
this building to determine if they would be applicable for energy
savings with reasonably good payback periods. Those EEMs that
have a payback period or those that are recommended for code
compliance, life cycle replacement, or other reasons are also
included.
Specific EEMs recommended for this facility are detailed in the
attached AkWarm Energy Audit Report along with specific payback
times, as well as estimated installation costs and estimated energy
savings. The higher priority items are summarized below:
a. Air Handler Controls
i. Individual Control for Fans: The main air handler,
make$up air unit, and restroom exhaust fan for the
facility are all operated using a single time clock. Each
piece of equipment should be controlled using a
dedicated controller so they can be programmed to
operate only when necessary. New controls should
include operation of control dampers and control
valves and may require installation of new sensors to
help with temperature controls.
ii. Carbon Dioxide (CO2) Monitoring: CO2 sensors can
be utilized to help reduce the amount of outside air
drawn into the building. Rather than supply a set
minimum amount of outside air during air handler
operation (20% of total supply air volume, for
example) the outside air can be varied to maintain the
CO2 levels below a determined set point, typically 750
parts per million for schools. This often results in less
Shaktoolik K-12 School Comprehensive Energy Audit
6
outside air being drawn into the building, which
reduces the amount of energy needed to heat the air.
iii. The above changes to ventilation control will provide
an estimated 6$10% annual energy savings with an
expected payback of approximately 8 years.
b. Pumps
i. The main constant volume heating circulations pumps
for the school can be changed out for one variable
speed (VFD) pump (presumably two would be
provided for one to serve as a backup). VFD pumps
can run at lower speeds when the school has a low
heating demand, which will save power and reduce
cost. The main circulation pump can also be turned
off when there is no call for heating, rather than run
continuously as it currently does.
ii. The constant duty domestic hot water recirculation
pump can be replaced with a pump that runs on a
time clock and only operates during hours that it is
needed.
iii. The pump changes will provide about a 3$5% energy
savings for the building with a payback of about 8.5
years.
c. Install Programmable Thermostats: Non$programmable
thermostats in occupied spaces in the building can be
replaced with programmable thermostats to allow for
automatically reducing space temperatures when they are
unoccupied. Recommended set points are 68$72 deg. F
during occupancy and 60 deg. F when unoccupied. This
will provide an energy savings of about 6$10% with an
expected payback of 1 year.
d. Interior Lighting Upgrade: Most of the facility lighting is
provided with T12 fluorescent fixtures. It is recommended
that all of these fixtures be retrofitted with new ballasts so
they can operate using T8 fluorescent bulbs, which are
more efficient. The anticipated energy savings is around 3$
5% with a payback of about 6.5 years.
e. Occupancy Sensors for Interior Lighting: Lighting is
controlled throughout the building using wall$mounted
toggle switches. It is recommended that all lights be
Shaktoolik K-12 School Comprehensive Energy Audit
7
equipped with occupancy sensors to reduce the amount of
time the lights are on when the spaces are unoccupied.
The annual energy savings will be about 3$5% with a
payback of approximately 6.5 years.
f. Exterior Lighting Upgrade: There are six exterior wall
mounted light fixtures, and six recess can type, that use
high pressure sodium (HPS) lamps and only operate during
dark times of the year. It is recommended that the fixtures
be replaced with light emitting diode (LED) fixtures. If the
fixtures are replaced the energy savings for lighting will be
approximately 2% and have a payback of about 8 years.
In addition to EEMs, various Energy Conservation Measures (ECMs)
are recommended that were not part of the energy audit model.
Some involve a modest capital investment. Others are policies or
procedures that are followed by management and employees that
require no capital outlay. Examples of recommended ECMs for this
facility include:
1. Use infrared automatic lavatory faucets and water closet
flush valves in all restrooms.
2. If automatic flushing is not desired then install water closet
flushometer valves for dual level flushing.
3. Turn off computers, monitors, printers, faxes, coffee
makers, etc when leaving the office for the day. Turn off
computers, monitors, printers, faxes, coffee makers, etc.,
when leaving for the day. These devices can also be
plugged into power strips equipped with occupancy sensors
so they will automatically turn off when the building is not in
use.
4. Provide occupancy sensors for unoccupied spaces such as
bathrooms, storage spaces and utility rooms. The payback
for this change may never be realized but the retrofit serves
to ensure that unseen lighting is not accidentally left on for
long periods of time such as summer break.
5. Disconnect refrigeration equipment over the summer,
including walk$in units and residential style refrigerators
throughout the building. This will save approximately
$415/year.
Shaktoolik K-12 School Comprehensive Energy Audit
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The priority recommendations in the detailed report are estimated to
save $24,763/year, with an installed cost of $132,179, for a 5.3 year
payback. This does not include design or CA services, but overall it
does indicate a cost effective energy savings program.
3. Audit and Analysis Background:
a. Program Description: This audit included services to identify,
develop, and evaluate energy efficiency measures at the
subject building. The scope of this project included evaluating
the building shell, lighting, other electrical systems, and
heating, ventilating, and air conditioning (HVAC) equipment.
Measures were selected such that an overall simple payback
period of 8 years or less could be achieved.
b. Audit Description and Methodology: Preliminary audit
information was gathered in preparation for the site survey,
including benchmark utility consumption data, floor and lighting
plans, and equipment schedules where available. A site visit
was performed to inventory and evaluate the actual building
condition, including:
i. Building envelope (roof, windows, etc)
ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
v. Plumbing systems
c. Method of Analysis: The information gathered prior to the site
visit and at the site visit is entered into AkWarm$C, an energy
modeling developed for Alaska Housing Finance Corporation
(AHFC) specifically to identify forecasted energy consumption
which can be compared to actual energy consumption.
AkWarm$C also has some pre$programmed EEM retrofit
options that can be analyzed with energy savings forecasted
based on occupancy schedules, utility rates, building
construction type, building function, existing conditions, and
climatic data that is already uploaded to the program based on
the zip code of the building. When new equipment is
Shaktoolik K-12 School Comprehensive Energy Audit
9
proposed, energy consumption is calculated based on
manufacturer’s cataloged information.
Cost savings are calculated based on the historical energy
costs for the building. Installation costs include labor and
equipment to estimate the full up$front investment required to
implement a change, but design and construction management
costs are excluded. Costs are derived from Means Cost Data,
industry publications, experience of the auditor, local
contractors and equipment suppliers. Maintenance savings
are calculated were applicable and are added to the energy
savings for each EEM.
The cost and savings are applied and a simple payback and
simple return on investment (ROI) is calculated. The simple
payback is based on the number of years that it takes for the
savings to pay back the net installation cost (Net Installation
divided by Net Savings.)
A simple life$time calculation is shown for each EEM. The life$
time for each EEM is estimated based on the typical life of the
equipment being replaced or altered. The energy savings is
extrapolated throughout the life$time of the EEM. The total
energy savings is calculated as the total life$time multiplied by
the yearly savings.
d. Limitations of the Study: All results are dependent on the
quality of input data provided, and can only act as an
approximation. In some instances, several methods may
achieve the identified savings. This report is not intended as a
final design document. A design professional, licensed to
practice in Alaska and in the appropriate discipline, who is
following the recommendations, shall accept full responsibility
and liability for the results. Budgetary estimates for
engineering and design of these projects in not included in the
cost estimate for each measure, but these costs generally run
around 15% of the cost of the work.
Shaktoolik K-12 School Comprehensive Energy Audit
10
4. Acknowledgements: We wish to acknowledge the help of numerous
individuals who have contributed information that was used to prepare
this report, including:
a. Alaska Housing Finance Corporation (Grantor): AHFC
provided the grant funds, contracting agreements, guidelines,
and technical direction for providing the audits. AHFC
reviewed and approved the final short list of buildings to be
audited based on the recommendation of the Technical
Service Provider (TSP).
b. Bering Strait School District (Owner): The BSSD provided
building access, original construction plans, two years energy
billing data, building schedules and functions, as well as other
resources needed to perform the audit.
c. Central Alaska Engineering Company (Benchmark TSP):
Central Alaska Engineering Company compiled the data
received from the BSSD and entered that data into the
statewide building database, called the Alaska Retrofit
Information System (ARIS).
d. Richard S. Armstrong, PE, LLC (Audit TSP): This is the
TSP who was awarded the projects in the Arctic Slope
Regional Corporation, Bering Straits area, and the Nana area.
The firm gathered all relevant benchmark information provided
to them, cataloged which buildings would have the greatest
potential payback, and prioritized buildings to be audited based
on numerous factors, including the Energy Use Index (EUI),
the Energy Cost Index (ECI), the age of the building, the size
of the building, the location of the building, the function of the
building, and the availability of plans for the building. They
also trained their selected sub$contracted auditors, assigned
auditors to the selected buildings, and performed quality
control reviews of the resulting audits. They prepared a listing
of potential EEMs that each auditor must consider, as well as
the potential EEMs that the individual auditor may notice in the
course of his audit. Richard S. Armstrong, PE, LLC also
Shaktoolik K-12 School Comprehensive Energy Audit
11
performed some of the audits to assure current knowledge of
existing conditions.
5. Building Description and Function: The subject structure is called
the Shaktoolik School and was constructed in 1980. The building
serves as a kindergarten through twelfth grade (K$12) educational
facility, which includes classrooms, administrative offices, a
commercial kitchen, a gymnasium, locker rooms, restrooms, two
residential apartments, and multiple storage and utility spaces. The
building is a two story structure with a full height basement under the
center portion of the building. The foundation on the west side of the
building is 4” slab on grade concrete, on which sit the gymnasium,
language arts classroom, gym storage, and a portion of one second
floor apartment. The east portion of the building is also 4” slab on
grade, on which sit classrooms and administrative offices. The center
portion of the building has a basement, first and second floors. The
basement has the maintenance workroom, mechanical/electrical
room, and kitchen storage. The first floor has the main entries, central
corridor, locker rooms, restrooms, commercial kitchen, and enclosed
delivery “dock” area. The second floor has two apartments, a small
office, two fan rooms, and limited storage. The basement is 8 feet in
height, the first floor in the center of the building is 8 feet in height, and
the second floor ceiling height in the center of the building follows the
roof slope from 6.5 to 9.5 feet high. The gymnasium ceiling follows
the roof slope, giving a ceiling height ranging from 18 to 23 feet. The
classroom ceilings also follow the roof slope, having ceiling heights
varying from 10.5 to 15 feet. The building roof is constructed of open
web trusses with sheathing and/or gypsum board on top and bottom
and batt insulation in between. The center portion of the building has
trusses that are slightly shallower than the slab portions, and were
designed for 16” of batt insulation as opposed to 18” for the rest of the
roof. The original overall roof insulation value was approximately R$
40, but given the high amount of heat loss seen in the AkWarm$C
model it is assumed that the insulation has either degraded over time,
which is possible since it is a vented roof, the insulation has
significantly compressed over time, or there was slightly less batt
insulation installed than the plans called for. In any case the roof has
been modeled with an insulation value of R$28. The exterior walls are
constructed of 2x12 wood studs, 24 inch on center, with sheathing
Shaktoolik K-12 School Comprehensive Energy Audit
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and/or gypsum board on either side and batt insulation in between.
The original overall insulation value may have been around R$30,
however the actual value is assumed to be closer to R$18 due to the
high rate of heat loss in the model. Overall the building is decent
condition though it is showing its age and is not built to current energy
conservations standards. Occupants commented that it did not
maintain comfortable space temperatures during winter weather,
dropping down as low as 50 deg. F during especially cold outdoor
temperatures. The building is occupied from the middle of August
through the middle of May. The school is unused during the summer
months.
a. Heating System: The school heating plant is in the basement
of the building. The heating system consists of two Weil$
McLain WGO$8 cast iron sectional boilers with Beckett model
707502 single$stage burners. The boilers are not original to
the 1980 construction and appear to have been installed in
2008. The new boilers have a combined total heat output of
about 528 MBH. The original boilers were designed for a heat
output of 873 MBH. This is a difference of 345 MBH, which is
likely the reason that the building has difficulty maintaining
temperature. It was also noted that the boiler pumps were
undersized, which would exacerbate the already inadequate
heating output. Hot glycol is circulated around the building
using multiple Grundfos single$speed circulators. Each pump
covers a zone or piece of equipment in the building. No
backup pumps are installed. It appears that all of the pumps
are operated manually and set to run constantly during the
heating season. The pumps are not equipped with variable
frequency drives (VFD), so they run at full speed when they
operate. Heat is distributed throughout the building using
fintube baseboard in most perimeter spaces, cabinet unit
heaters in the vestibules and main corridor, unit heaters in
utility spaces, and some supplemental heat through tempered
ventilation air.
b. Ventilation System: There are two air handlers and one
make$up air unit in the building as well as multiple exhaust
fans. SF$1 is a make$up air unit that serves the kitchen hood
Shaktoolik K-12 School Comprehensive Energy Audit
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exhaust fan. SF$2 is the air handler that serves classrooms
and administrative spaces in the building. SF$1 and 2 are
operated using the same time clock. SF$3 serves the
gymnasium and was installed in 2005 presumably because
SF$2, which previously served the gymnasium, was too small
to provide effective ventilation. SF$3 is operated using a
controller mounted on the unit that is capable of programming
schedules for automatic operation. Relief air is provided by a
large opening in the west wall of the gymnasium that opens
when SF$3 is operating. A thermostat in the gymnasium
controls the air handler heating coil. The unit was not
operating at the time of the site visit and is likely only used
when large gatherings are held in the gymnasium. EF$1
exhaust fans serve the locker rooms and switch on with the
lights. EF$2 exhaust fan serves the main restrooms and is
controlled using the same time clock as SF$1 and 2. EF$3 are
small ceiling exhaust fans in restrooms operated manually with
the lights. EF$4 is the kitchen hood exhaust fan, which is
switched on at the wall next to the hood. Two ceiling paddle
fans are installed in the gymnasium presumably to destratify
the space. They are operated manually with a wall switch.
State of Alaska design codes mandate that certain quantities of
ventilation air must be provided. However, there are devices
and strategies that can be employed to regulate the
introduction of ventilation air so energy is not wasted, such as
demand control ventilation based on CO2 concentration.
c. Plumbing System: Water is provided from the village utility
and there is not any on$site storage. Fixtures include water
closets, lavatories, individual showers, classroom sinks, mop
sinks, and large sinks for cooking. Most fixtures are located in
bathrooms, locker rooms, custodial closets and the commercial
kitchen.
d. Domestic Hot Water: How water is generated using a 68
gallon oil fired water heater. No additional hot water storage is
provided. There is a hot water recirculation pump that runs
constantly to provide instant hot water to remote fixtures.
Shaktoolik K-12 School Comprehensive Energy Audit
14
e. Lighting: Lighting throughout the building is provided with T$
12 fluorescent fixtures using magnetic ballasts and controlled
with wall mounted toggle switches. In the central corridor,
vestibules and a few limited locations T$8 fluorescent fixtures
have been installed, which are also operated manually. The
gymnasium has high bay lighting fixtures with (5) 2$tube, plug$
in, compact fluorescent bulbs at 55 watts each. Gymnasium
lights are switched on manually. Exterior lights are high
pressure sodium (HPS) fixtures and include wall packs (150
watts) and recess can canopy mounted (70 watts) fixtures.
Exterior lights operate using daylight sensors.
f. Fire Sprinkler: The building is equipped with a fire sprinkler
protection system in the basement.
6. Historic Energy Consumption: Energy consumption is modeled
within the AkWarm$C program. Two years of benchmark data were
provided for this building, for 2009 and 2010, however the data for
2010 showed that virtually no electricity was used between March and
August. This could be due to a number of causes such as inaccurate
data or work being performed at the school but in any case it does not
come close to representing the energy used in 2009. Consequently
only the energy data for 2009 was used in the energy model since it is
likely a more accurate picture of the building energy use. The energy
consumption data is presented and graphed in the attached AkWarm$
C program results.
Based on the benchmark energy data for 2009 the electric
consumption for the building was 120,804 kWh/year at an average
cost of $73,068/year. The average fuel oil consumption was 11,477
gallons/year, at an average annual cost of $47,667/year.
7. Energy Efficiency Measures Considered or Recommended: The
building was examined for application of a multitude of potential EEMs
that are discussed below. Those EEMs that appear to have an
application for the subject building are further analyzed for estimated
payback periods, either within the AkWarm$C program or separately
within this report. The accuracy of the cost estimates and paybacks
varies significantly due to a multitude of conditions, but is estimated to
Shaktoolik K-12 School Comprehensive Energy Audit
15
be approximately +/$ 25%. Assumptions made regarding energy costs
and the life of the EEM, noting that post$construction measurement
and verification are based on energy savings, not energy cost
savings. Many of the selected EEMs are analyzed within the
AkWarm$C program using the schedules and estimated costs input
into the model.
a. Fluorescent lamp and ballast only upgrades: It is
recommended that all of the T$12 lamps and magnetic ballasts
be replaced with programmable electronic ballasts and T$8
lamps. Programmed start ballasts are also suitable for motion
detector switching control, so the lights can be switched on and
off frequently without adversely affecting the life of the lamps.
This is one proposed measure that re$uses the existing
fixtures, thus minimizing costs. Savings will vary depending on
installed and replaced equipment.
b. Occupancy Sensors for Lighting: The spaces in the building
can be retrofitted with occupancy sensors so the lights are only
on when rooms are in use. This applies to hallways,
classrooms, offices, gymnasium, storage rooms, and
restrooms. Though most rooms will be occupied during the
majority of the school day, certain times of the day, such as
lunchtime, will cause most rooms to be empty. Allowing lights
to turn off automatically during these times will save energy.
Occupancy sensors are not recommended for the kitchen
since it is important that kitchen staff have control over lighting
for safety reasons.
a. Exterior Lighting Upgrade: High$intensity discharge (HID)
fixtures, such as high pressure sodium (HPS), are commonly
used for building exterior lighting in Alaska because they
perform well in cold weather and are more efficient than many
other types of lighting. However, light emitting diode (LED)
fixtures are proving to be a viable alternative to HPS. LED
fixtures use nano reflector technology with drivers offering
50,000 hours life, about 6 years, as compared to only 20,000
hours with high$intensity discharge (HID) fixtures. LED fixtures
offer the instant$on feature of fluorescent fixtures but use
Shaktoolik K-12 School Comprehensive Energy Audit
16
significantly less energy than the HID fixtures. LEDs have an
added benefit of operating more efficiently (using less power)
as the ambient temperature gets colder, and some have been
factory tested to operate down to $40 deg F (actual installations
in Antarctica and Fairbanks indicate they operate at lower
temperatures as well) depending on manufacturer. The
proposed LED fixtures are dark sky compliant, using 100%
cutoff optics to reduce light pollution. LEDs provide a different
type of light than HPS, both in color and lumen output, that has
the effect of providing a clearer, brighter light while using less
power than a HPS bulb. The following chart indicates energy
savings for various exterior building mounted light fixtures (MH
Metal Halide; HSP High Pressure Sodium) using Scotopic
lighting measurements:
HID Lamp HID
System
Wattage
LED
System
Wattage
Energy
Savings
(%)
70W HPS 90W 27W 79
150W HPS 188W 54W 71
c. Ventilation Operation Schedules: Some of the ventilation
fans in the facility are operated on the same time clock
schedule. Each of the fans serves a space (or spaces) with
unique occupancy schedules so they should be programmed
to match the space use. It is recommended that each fan
discussed below have a dedicated electronic controller that will
allow it to be programmed as indicated. New programmable
controllers will also allow for faster, simpler programming so
they can be easily adjusted if building use schedules change.
In order to reduce the amount of electric and heating energy
used by the fans the following scheduling changes are
recommended:
i. SF1, Kitchen Exhaust MakeUp Air – Interlock this unit
to operate with the kitchen cooking hood exhaust fan,
EF$4.
Shaktoolik K-12 School Comprehensive Energy Audit
17
ii. SF2, Classrooms and Administration – Operate the
unit only during school hours.
iii. SF3, Gymnasium – Operate the unit during known
periods of occupancy such as lunch hours and
scheduled “open gym” hours. Provide an electronic timer
in the main office for operation during off$schedule hours.
iv. EF2, Main Restroom Exhaust Fan Operate the unit
during known periods of occupancy such as school hours
and “open gym”. Provide an electronic timer in the main
office for operation during off$schedule hours.
e. Carbon Dioxide (CO2) Monitoring: The amount of CO2 in a
building has been shown to have a direct effect on the
performance of the occupants in the building. High levels of
CO2 cause occupants to feel sleepy and lose concentration. It
is also an indication that other indoor contaminants, such as
volatile organic compounds (VOCs), odors and excessive
humidity are likely increasing in concentration. For these
reasons ventilation air is required by code to refresh indoor
building air. Typically the ventilation rate is determined based
on the number of occupants and space sizes. In many cases
this over$ventilates the space. Another method of ventilating
spaces is called demand control ventilation, which entails
varying the amount of outside air supplied based on CO2 levels
in the building. Sensors can be placed in spaces throughout
the building (preferred) or in the return air duct at the air
handlers, and the air handler outside air dampers can be
modulated to increase or decrease the outside air delivered to
the building. This modification applies specifically to SF$3 and
may also be appropriate for SF$2.
d. VFD Heating Pumps: In most cases heating circulators are
designed for greater flow rates than is needed during normal
operation. Bypass valves are installed to allow the constant
volume of flow to continue even when a small amount of that
flow is providing heat. Energy is wasted circulating heated
glycol that is not needed. There are a number of pumps on
Shaktoolik K-12 School Comprehensive Energy Audit
18
the market that have variable frequency drives (VFD), which
allow the speed of the motor to be adjusted to match the flow
rate demand. Pump affinity laws show that motor speed and
power have a cubic mathematical relationship to each other.
As the pump speed is reduced “X” RPM the power
consumption is reduced by X1/3 watts (or horsepower), showing
that a small change in pump speed has an amplified affect on
power input. Operating pumps at lower speeds when there is
lower flow demand significantly reduces power consumption. It
is recommended that the heating circulators be replaced with
VFD pumps so power savings can be realized.
e. Boiler Temperature Outdoor Air Reset: As the outside air
temperature varies building heat loss varies as well, losing
heat at a faster rate as the ambient temperature drops. Boiler
systems are typically sized to meet the heating demands of the
coldest expected temperatures. These extreme temperatures
may only occur for short durations in a given winter and will
vary in frequency and length year to year. Most cast iron
sectional boilers supply heating water at the same temperature
year$round. During periods of warmer weather in the heating
season high heating water supply temperatures may cause
space temperatures to overshoot set points because the hot
boiler water dumps heat into the building at a faster rate than
the building is losing it, leading to occupant discomfort. This
will also cause the boilers to cycle more often since it takes
less time to heat the returning water, putting unnecessary ware
on the boilers. A common way of handling this issue is to use
an outdoor reset controller to reduce the heating loop
temperature so that heat is transferred into the building closer
to the rate at which the building is losing heat. Outdoor reset
varies the boiler or heating loop water temperature based on
the ambient temperature – increasing the water temperature
when outdoor conditions are cold and decreasing water
temperature for warmer outdoor conditions. It is very common
for maintenance personnel to manually adjust the boiler
temperature to give the same effect. In order to maintain
tighter control and prevent issues such as setting the boiler
temperature too low (causing the boiler to condense), or
Shaktoolik K-12 School Comprehensive Energy Audit
19
forgetting to reset the boiler temperature, it is recommended
that a controller be installed that will perform the outdoor reset
automatically. There is not a provision for simulating this in the
AkWarm$C program so no energy savings are considered
here. However it is recommended that a licensed professional
engineer perform the design for installation of this controller at
which time an energy savings analysis could be performed.
f. Waste Heat: The school building is not currently supplied with
waste heat. However the school is roughly 0.25 miles from the
village power utility. If the school was supplied with waste heat
from the village power plant it would have a tremendous impact
on energy savings for the school, likely surpassing fuel oil as
the primary heating source. Connecting the school heating
plant to the village power plant would require a large capital
investment but could have a payback of 10$15 years. No
investigation has been performed on the amount of heat that
would be available from the power plant, which would require a
thorough engineering analysis. It is recommended that a
preliminary investigation be performed to determine the
viability of this option.
b. Fuel Oil Metering: It is recommended that fuel oil meters be
installed to track the amount of fuel used by the boilers and
electric generator. The only methods currently used on site for
tracking fuel usage are recording the amount of fuel put into
bulk fuel storage tanks when they are refilled and maintenance
personnel manually recording the fuel levels in the tanks.
Neither method is able to provide precise information nor does
it give a detailed picture of the rate at which fuel is used. In
order to understand current and future fuel consumption, a fuel
meter should be installed at the fuel supply to the building.
The Pathfinder Instruments FM$200 meter is for fuel pipes
sized ¾” to 1” (different meters, must specify pipe size), and
they cost around $225 each. They operate at a flow range of
4$20 GPM. These are mechanical meters with strainers and 3$
digid display that shows both present fuel use, and cumulative
fuel use. Any ESCO contract, or AHFC financed contract will
require fuel metering to verify paybacks of energy conservation
Shaktoolik K-12 School Comprehensive Energy Audit
20
measures. Electronic turbine meters are also available. See
pathfinderinstruments.com for product information.
8. Interactive Effects of Projects: The AkWarm$C program calculates
savings assuming that all recommended EEM are implemented. If
some EEMs are not implemented, savings for the remaining EEMs will
be affected, in some cases positively, and in others, negatively. For
example, if the fan motors are not replaced with premium efficiency
motors, then the savings for the project to install variable speed drives
(VFDs) on the fans will be increased.
In general, all projects were evaluated sequentially so that energy
savings associated with one EEM would not be attributed to another
EEM as well. For example, the night setback EEM was analyzed
using the fan and heating load profile that will be achieved after
installation of the VFD project is completed. By modeling the
recommended projects sequentially, the analysis accounts for
interactive effects between the EEMs and does not “double count”
savings.
Interior lighting, plug loads, facility equipment, and occupants
generate heat within the building. When the building is in cooling
mode, these contribute to the overall cooling demands of the
building; therefore lighting efficiency improvements will reduce
cooling requirements on air conditioned buildings. Conversely,
lighting efficiency improvements are anticipated to increase heating
requirements slightly. Heating penalties are included in the lighting
project analysis that is performed by AkWarm$C.
9. Loan Program: The Alaska Housing Finance Corporation (AHFC)
Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State of
Alaska program enacted by the Alaska Sustainable Energy Act
(senate Bill 220, A.S. 18.56.855, “Energy Efficiency Revolving Loan
Fund). The AEERLF will provide loans for energy efficiency retrofits
to public facilities via the Retrofit Energy Assessment for Loan System
(REAL). As defined in 15 AAC 155.605, the program may finance
energy efficiency improvements to buildings owned by:
a. Regional educational attendance areas;
Shaktoolik K-12 School Comprehensive Energy Audit
21
b. Municipal governments, including political subdivisions of
municipal governments;
c. The University of Alaska;
d. Political subdivisions of the State of Alaska, or
e. The State of Alaska
Native corporations, tribal entities, and subsidiaries of the federal
government are not eligible for loans under this program.
Shaktoolik K-12 School Comprehensive Energy Audit
22
Appendix A: Photos
Classrooms, East Elevation
Main Entrance, Northeast Elevation
Shaktoolik K-12 School Comprehensive Energy Audit
23
Delivery Area, Second Floor Apt., Gym, Northwest Elevation
Gym, Second Floor Apartment, West Elevation
Shaktoolik K-12 School Comprehensive Energy Audit
24
Gym Entrance, Classroom Entrance, Second Floor Apartment, South
Building Entrance, Classrooms, South Elevation
Typical Classroom
Shaktoolik K-12 School Comprehensive Energy Audit
25
Gymnasium, North wall
Gymnasium, East wall with SF3 ductwork, Kitchen on the left
Shaktoolik K-12 School Comprehensive Energy Audit
26
Kitchen cooking equipment under exhaust hood, hot wells to right
Kitchen dish washing equipment
Shaktoolik K-12 School Comprehensive Energy Audit
27
Kitchen walkin refrigerator and freezer
Kitchen makeup air Air Handler SF1
Shaktoolik K-12 School Comprehensive Energy Audit
28
Classroom Air Handler SF2
Gym Air Handler SF3
Shaktoolik K-12 School Comprehensive Energy Audit
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Kitchen Hood exhaust fan on roof
Building exhaust fan
Shaktoolik K-12 School Comprehensive Energy Audit
30
Air handler and fan time clock
Domestic water pressure booster system
Shaktoolik K-12 School Comprehensive Energy Audit
31
Boilers and water heater, heating circulation pumps in background
Heating circulation pumps
Shaktoolik K-12 School Comprehensive Energy Audit
32
Shaktoolik Village, Ariel View Village Power Utility School
Shaktoolik K-12 School Comprehensive Energy Audit
33
Appendix B: AK Warm Energy Model
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 1
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 4/9/2012 10:32 AM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Shaktoolik School Auditor Company: RSA Engineering, Inc.
Address: Shaktoolik Alaska 99771 Auditor Name: Adam Wilson
City: Shaktoolik Auditor Address: 2522 Arctic Blvd
Suite 200
Anchorage, AK 99503
Client Name: Richard Ried
Client Address: PO Box 225
Unalakleet AK 99684
Auditor Phone: (907) 276-0521
Auditor FAX:
Client Phone: (907) 624-3611 Auditor Comment:
Client FAX:
Design Data
Building Area: 17,468 square feet Design Heating Load: Design Loss at Space: 280,495
Btu/hour
with Distribution Losses: 280,495 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 427,584 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 156 people Design Indoor Temperature: 70.1 deg F (building average)
Actual City: Shaktoolik Design Outdoor Temperature: -24.4 deg F
Weather/Fuel City: Shaktoolik Heating Degree Days: 13,919 deg F-days
Utility Information
Electric Utility: AVEC-Shaktoolik - Commercial - Lg Natural Gas Provider: None
Average Annual Cost/kWh: $0.508/kWh Average Annual Cost/ccf: $0.000/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting Refrige
ration
Other
Electric
al
Cooking Clothes
Drying
Ventilatio
n Fans
Service
Fees Total Cost
Existing
Building
$43,363 $0 $7,037 $28,176 $2,393 $5,947 $8,299 $0 $7,214 $60 $102,489
With
Proposed
Retrofits
$30,519 $0 $6,830 $16,820 $1,902 $5,975 $8,339 $0 $7,281 $60 $77,725
SAVINGS $12,844 $0 $207 $11,356 $492 -$28 -$41 $0 -$67 $0 $24,763
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 2
$0
$20,000
$40,000
$60,000
$80,000
$100,000
$120,000
Existing Retrofit
Service Fees
Ventilation and Fans
Space Heating
Refrigeration
Other Electrical
Lighting
Domestic Hot Water
Cooking
Annual Energy Costs by End Use
$0
$20,000
$40,000
$60,000
$80,000
$100,000
$120,000
Existing Retrofit
#2 Oil Electricity
Annual Energy Costs by Fuel
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 3
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Refrigeration: Walk-
in
Refrigerator/Freezer
Add new Seasonal
Shutdown
$193 $1 1174.50 0
2 Refrigeration: True
Mfg. Model T-49
Add new Seasonal
Shutdown
$125 $1 774.06 0
3 Refrigeration:
Refrigerator/Freezer
Add new Seasonal
Shutdown
$87 $1 528.50 0
4 Setback Thermostat:
122 - Multi-Purpose
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 122 - Multi-Purpose
Room space.
$1,768 $200 119.83 0.1
5 Refrigeration: small
fridge
Add new Seasonal
Shutdown
$10 $1 58.75 0.1
6 Setback Thermostat:
108C - Elementary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108C - Elementary
Classroom space.
$516 $200 35.01 0.4
7 Setback Thermostat:
123 - Language Arts
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 123 - Language Arts
space.
$491 $200 33.29 0.4
8 Setback Thermostat:
104 - High School
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 104 - High School
space.
$426 $200 28.86 0.5
9 Setback Thermostat:
107 - Resource
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 107 - Resource Room
space.
$399 $200 27.04 0.5
10 Setback Thermostat:
108D - Elementary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108D - Elementary
Classroom space.
$359 $200 24.34 0.6
11 Setback Thermostat:
105 - Science
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 105 - Science space.
$344 $200 23.32 0.6
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
12 Setback Thermostat:
108B -Elementary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108B -Elementary
Classroom space.
$300 $200 20.32 0.7
13 Setback Thermostat:
113 - Boys Locker
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 113 - Boys Locker
Room space.
$273 $200 18.52 0.7
14 Setback Thermostat:
106 - Home
Economics
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 106 - Home Economics
space.
$262 $200 17.75 0.8
15 Setback Thermostat:
204 - Dining/205 -
Living/206 - Kitchen
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 204 - Dining/205 -
Living/206 - Kitchen space.
$239 $200 16.21 0.8
16 Setback Thermostat:
201 - Studio
Apartment
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 201 - Studio
Apartment space.
$193 $200 13.07 1
17 Setback Thermostat:
211 - Bedroom
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 211 - Bedroom space.
$119 $200 8.06 1.7
18 Setback Thermostat:
216 - Bedroom
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 216 - Bedroom space.
$108 $200 7.35 1.8
19 Lighting:
Gymnasium: Type F -
Sportlite SLC275-PC-
WG Core Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$759 $700 6.71 0.9
20 Setback Thermostat:
209 - Bedroom
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 209 - Bedroom space.
$76 $200 5.17 2.6
21 Setback Thermostat:
210 - Bedroom
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 210 - Bedroom space.
$76 $200 5.13 2.6
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 5
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
22 Lighting:
Gymnasium: Type F -
Sportlite SLC275-PC-
WG Perimeter Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$519 $700 4.51 1.3
23 Lighting: Classrooms:
Type B3 - Surface
F40WW/RS/WM
Perimeter Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$964 $1,400 4.18 1.5
24 Setback Thermostat:
102 - Main Corridor
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 102 - Main Corridor
space.
$54 $200 3.66 3.7
25 Lighting: Utility,
Storage, Restrooms,
Locker Rooms, Stair:
Type C2 Core Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$1,094 $2,100 3.22 1.9
26 Lighting: Classrooms:
Type B3 - Surface
F40WW/RS/WM
Core Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$711 $1,400 3.14 2
27 Lighting: Science
105/Language Arts
123: Type D2 -
Surface
F40WW/RS/WM
Remove Manual Switching
and Add new Occupancy
Sensor
$357 $700 3.10 2
28 Lighting: Principal
110: Type A4 -
Recessed
F40WW/RS/WM
Core Zone
Replace with 2 FLUOR (4)
T8 4' F32T8 32W Standard
Program StdElectronic
$128 $350 2.26 2.7
29 Setback Thermostat:
207 - Bathroom
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 207 - Bathroom space.
$33 $200 2.26 6
30 HVAC And DHW Change heat loop circ.
pumps to one VFD pump,
run domestic hot water
recirc. pump on time clock
or temp. sensor
$3,407 $30,000 1.57 8.8
31 Lighting: Boys/Girls
Restrooms: Type K2 -
Surface 60A/99 Core
Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$163 $700 1.45 4.3
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 6
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
32 Ventilation Provide new electronic
controls to operate air
handling units. Use CO2
sensor to operate gym air
handler. Reprogram air
handlers to operate on
proper schedules
$4,635 $50,000 1.25 10.8
33 Lighting: Science
105/Home Ec 106:
Type H2 - Wall
F40WW/RS/WM
Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
$108 $525 1.25 4.9
34 Lighting: Classrooms:
Type B3 - Surface
F40WW/RS/WM
Core Zone
Replace with 26 FLUOR (3)
T8 4' F32T8 32W Standard
Program StdElectronic
$917 $4,550 1.25 5
35 Lighting: Exterior
Wall Pack: Type I -
Wall LU150/S5
Replace with 6 LED 50W
Module StdElectronic
$1,598 $9,000 1.10 5.6
36 Lighting: Principal
110: Type A4 -
Recessed
F40WW/RS/WM
Core Zone
Remove Manual Switching
and Add new Occupancy
Sensor
$57 $350 1.01 6.1
37 Lighting: Classrooms:
Type B3 - Surface
F40WW/RS/WM
Perimeter Zone
Replace with 45 FLUOR (3)
T8 4' F32T8 32W Standard
Program StdElectronic
$1,235 $7,875 0.95 6.4
38 Lighting: Science
105/Language Arts
123: Type D2 -
Surface
F40WW/RS/WM
Replace with 16 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$319 $2,800 0.69 8.8
39 Lighting: Utility,
Storage, Restrooms,
Locker Rooms, Stair:
Type C2 Core Zone
Replace with 23 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$422 $4,025 0.65 9.5
40 Lighting: Corridor
128: Type A2 -
Recessed
F40WW/RS/WM
Replace with 2 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$34 $350 0.59 10.3
41 Lighting: Exterior
Recessed Can: Type
M - Recessed LU70
Replace with 6 LED 25W
Module StdElectronic
$820 $9,000 0.56 11
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 7
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
42 Lighting: Corridor
128: Type A2 -
Recessed
F40WW/RS/WM
Remove Manual Switching
and Add new Occupancy
Sensor
$23 $350 0.39 15.5
43 Lighting: Science
105/Home Ec 106:
Type H2 - Wall
F40WW/RS/WM
Remove Manual Switching
and Add new Occupancy
Sensor
$42 $700 0.37 16.5
44 Setback Thermostat:
108A - Elementary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108A - Elementary
Classroom space.
$0 $200 0.00 Infinity
45 Setback Thermostat:
109/111 - Teachers
Work Area
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 109/111 - Teachers
Work Area space.
$0 $200 0.00 Infinity
46 Setback Thermostat:
110 - Conference
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 110 - Conference
Room space.
$0 $200 0.00 Infinity
47 Setback Thermostat:
114 - Girls Locker
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 114 - Girls Locker
Room space.
$0 $200 0.00 Infinity
48 Setback Thermostat:
212 - Hall
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 212 - Hall space.
$0 $200 0.00 Infinity
TOTAL $24,763 $132,179 1.95 5.3
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R:Value Recommendation Type/R:
Value
Installed
Cost
Annual
Energy
Savings
Exterior Doors – Replacement
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 8
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
30 Change heat loop circ. pumps to one VFD pump, run domestic hot water recirc.
pump on time clock or temp. sensor
$30,000 $3,407
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
4 122 - Multi-
Purpose Room
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 122 - Multi-Purpose
Room space.
$200 $1,768
6 108C - Elementary
Classroom
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108C - Elementary
Classroom space.
$200 $516
7 123 - Language
Arts
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 123 - Language Arts
space.
$200 $491
8 104 - High School Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 104 - High School
space.
$200 $426
9 107 - Resource
Room
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 107 - Resource Room
space.
$200 $399
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 9
10 108D - Elementary
Classroom
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108D - Elementary
Classroom space.
$200 $359
11 105 - Science Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 105 - Science space.
$200 $344
12 108B -Elementary
Classroom
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108B -Elementary
Classroom space.
$200 $300
13 113 - Boys Locker
Room
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 113 - Boys Locker
Room space.
$200 $273
14 106 - Home
Economics
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 106 - Home Economics
space.
$200 $262
15 204 - Dining/205 -
Living/206 -
Kitchen
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 204 - Dining/205 -
Living/206 - Kitchen space.
$200 $239
16 201 - Studio
Apartment
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 201 - Studio Apartment
space.
$200 $193
17 211 - Bedroom Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 211 - Bedroom space.
$200 $119
18 216 - Bedroom Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 216 - Bedroom space.
$200 $108
20 209 - Bedroom Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 209 - Bedroom space.
$200 $76
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 10
21 210 - Bedroom Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 210 - Bedroom space.
$200 $76
24 102 - Main Corridor Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 102 - Main Corridor
space.
$200 $54
29 207 - Bathroom Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 207 - Bathroom space.
$200 $33
44 108A - Elementary
Classroom
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108A - Elementary
Classroom space.
$200 $0
45 109/111 - Teachers
Work Area
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 109/111 - Teachers
Work Area space.
$200 $0
46 110 - Conference
Room
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 110 - Conference Room
space.
$200 $0
47 114 - Girls Locker
Room
Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 114 - Girls Locker Room
space.
$200 $0
48 212 - Hall Existing Unoccupied Heating
Setpoint: 72.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 65.0 deg F for
the 212 - Hall space.
$200 $0
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
32 Provide new electronic controls to operate air handling units. Use CO2 sensor to
operate gym air handler. Reprogram air handlers to operate on proper schedules
$50,000 $4,635
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 11
19 Gymnasium: Type F
- Sportlite SLC275-
PC-WG Core Zone
8 FLUOR 250 Watt
StdElectronic with Manual
Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$700 $759
22 Gymnasium: Type F
- Sportlite SLC275-
PC-WG Perimeter
Zone
7 FLUOR [Unknown Lamp] with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$700 $519
23 Classrooms: Type
B3 - Surface
F40WW/RS/WM
Perimeter Zone
45 FLUOR (3) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$1,400 $964
25 Utility, Storage,
Restrooms, Locker
Rooms, Stair: Type
C2 Core Zone
23 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$2,100 $1,094
26 Classrooms: Type
B3 - Surface
F40WW/RS/WM
Core Zone
26 FLUOR (3) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$1,400 $711
27 Science
105/Language Arts
123: Type D2 -
Surface
F40WW/RS/WM
16 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$700 $357
28 Principal 110: Type
A4 - Recessed
F40WW/RS/WM
Core Zone
2 FLUOR (4) T12 4' F40T12 40W
Standard Magnetic with
Manual Switching
Replace with 2 FLUOR (4)
T8 4' F32T8 32W Standard
Program StdElectronic
$350 $128
31 Boys/Girls
Restrooms: Type
K2 - Surface
60A/99 Core Zone
2 INCAN (2) A Lamp, Halogen
60W with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$700 $163
33 Science 105/Home
Ec 106: Type H2 -
Wall
F40WW/RS/WM
3 FLUOR (2) T12 4' F40T12 40W
Standard (2) Magnetic with
Manual Switching
Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
(2) Program StdElectronic
$525 $108
34 Classrooms: Type
B3 - Surface
F40WW/RS/WM
Core Zone
26 FLUOR (3) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 26 FLUOR (3)
T8 4' F32T8 32W Standard
Program StdElectronic
$4,550 $917
35 Exterior Wall Pack:
Type I - Wall
LU150/S5
6 HPS 150 Watt Magnetic with
Daylight Sensor
Replace with 6 LED 50W
Module StdElectronic
$9,000 $1,598
36 Principal 110: Type
A4 - Recessed
F40WW/RS/WM
Core Zone
2 FLUOR (4) T12 4' F40T12 40W
Standard Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$350 $57
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 12
37 Classrooms: Type
B3 - Surface
F40WW/RS/WM
Perimeter Zone
45 FLUOR (3) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 45 FLUOR (3)
T8 4' F32T8 32W Standard
Program StdElectronic
$7,875 $1,235
38 Science
105/Language Arts
123: Type D2 -
Surface
F40WW/RS/WM
16 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 16 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$2,800 $319
39 Utility, Storage,
Restrooms, Locker
Rooms, Stair: Type
C2 Core Zone
23 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 23 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$4,025 $422
40 Corridor 128: Type
A2 - Recessed
F40WW/RS/WM
2 FLUOR (2) T12 F40T12 35W
U-Tube Energy-Saver Magnetic
with Manual Switching
Replace with 2 FLUOR (2)
T8 4' F32T8 32W Standard
Program StdElectronic
$350 $34
41 Exterior Recessed
Can: Type M -
Recessed LU70
6 HPS 70 Watt Magnetic with
Daylight Sensor
Replace with 6 LED 25W
Module StdElectronic
$9,000 $820
42 Corridor 128: Type
A2 - Recessed
F40WW/RS/WM
2 FLUOR (2) T12 F40T12 35W
U-Tube Energy-Saver Magnetic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$350 $23
43 Science 105/Home
Ec 106: Type H2 -
Wall
F40WW/RS/WM
3 FLUOR (2) T12 4' F40T12 40W
Standard (2) Magnetic with
Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$700 $42
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
1 Walk-in
Refrigerator/Freeze
r
Walk-in Refrigerator/Freezer Add new Seasonal
Shutdown
$1 $193
2 True Mfg. Model T-
49
Mobile Refrigerator in Kitchen Add new Seasonal
Shutdown
$1 $125
3 Refrigerator/Freeze
r
3 Residential
Refrigerator/Freezer
Add new Seasonal
Shutdown
$1 $87
5 small fridge small fridge Add new Seasonal
Shutdown
$1 $10
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Shaktoolik School
Page 13
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AkWarmCalc Ver 2.1.4.2, Energy Lib 3/1/2012
Shaktoolik K-12 School Comprehensive Energy Audit
47
Appendix C: Existing Plans