HomeMy WebLinkAboutBSSD-ELI-RSA Elim Aniguiin School 2012-EERichard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
Elim Aniguiin K12 School
Elim, Alaska
Project # BSSDELIRSA01
Prepared for:
Bering Strait School District
Contact: Richard Ried, Maintenance Supervisor
Phone: 9076244249
Unalakleet, Alaska
February 17, 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
Elim Aniguiin K-12 School Comprehensive Energy Audit
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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 21
9. Loan Program 21
Appendix A: Photos 23
Appendix B: AkWarm7C Report 35
Appendix C: Building Schedules and Plans 48
Performed by: ___________________________
Adam W. Wilson, PE, CEA
CEA # 1618
RSA Engineering, Inc.
Reviewed by: ___________________________
Richard Armstrong, PE, CEM
CEA #178, CEM # 13557
Elim Aniguiin K-12 School Comprehensive Energy Audit
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1. REPORT DISCLAIMERS
This audit was performed using American Recovery and Reinvestment Act
(ARRA) funds, managed by the Alaska Housing Finance Corporation
(AHFC).
The information contained in this report, including any attachments, is
intended solely for use by the building owner and the AHFC. 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. AkWarm$C is a building energy modeling software
developed under contract with AHFC.
Elim Aniguiin K-12 School Comprehensive Energy Audit
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Investment Grade Energy Audit
Elim Aniguiin K12 School
2. Executive Summary:
The Elim Aniguiin K$12 School was constructed in 2002, using
design concepts and construction materials that were similar to
present day Western Alaska school construction. It is owned and
operated by the Bering Strait School District (BSSD). Benchmark
energy use data collected for this building is presented in Table 1
below:
Table 1
2009 2009 2010 2010
Utility Consumption Cost/Year Consumption Cost/Year
Electricity$kWh 199,482 $109,565 128,627 $ 75,292
No. 2 Fuel Oil $
Gallons
9,408 $ 38,954 14,396 $ 44,657
Ttl Energy Costs $148,519 $119,949
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:
Table 2
Elim Aniguiin
K$12 School
Koyuk Malimiut K$
12 School (neigh$
boring village)
Average for
All BSSD
Schools
Energy Use Index (EUI)
kBTU/SF Avg 2009, 2010
71.2 136.4 125.3
Energy Cost Index (ECI)
Average 2009, 2010
$4.49 $7.17 $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
Elim Aniguiin K-12 School Comprehensive Energy Audit
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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. Building HVAC Controls
i. The building heating, ventilation and air conditioning
(HVAC) system is currently served by pneumatic
controls. It is recommended that the pneumatic
control system be replaced with an electronic control
system. This will allow greater control of the HVAC
systems and reduce the amount of maintenance costs
associated with a pneumatic controls, while keeping
the controls relatively simple for maintenance
personnel to work with.
ii. Upgrading controls would overlap with other
recommended work described below so it is difficult to
identify the savings and payback of this upgrade
alone. However it is safe to assume that most of the
energy savings for the project will be due to controls
upgrades. An estimate of $40,000 would be
reasonable, with a savings of about 15$20% and a pay
back of approximately 4.5 years.
b. Air Handler Controls
i. Automated Schedules vs. Manual Control: The air
handling units (identified as H&V units on the plans –
referred to as HVU in this report) are designed to
operate primarily using time clock schedules but are
actually operated manually by the school maintenance
personnel. The units should be operated
automatically rather than manually in order to ensure
they are running as needed and only when needed.
Upgrading the building control system will make it
simpler to provide this level of control and easier to
Elim Aniguiin K-12 School Comprehensive Energy Audit
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adjust equipment operating schedules as building use
changes over time.
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 HVU operation
(20% of total HVU air volume, for example) the
outside air can be varied to maintain the CO2 levels
below a determined setpoint, typically 750 parts per
million for schools. This often results in less outside
air being drawn into the building, which reduces the
amount of energy needed to heat the air.
iii. The above changes to HVU control will provide an
estimated 10$15% annual energy savings with an
expected payback of approximately 1 year.
c. Pumps
i. The main constant volume heating circulations pumps
for the school can be changed out for variable speed
(VFD) pumps. 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 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 2% energy
savings for the building with a payback of about 5.3
years.
d. Reduce Thermostat Set Points: Many of the rooms in the
building have problems overheating. As a result the
building maintenance man has set the room temperatures
at 60 degrees F. This kind of issue will likely be corrected
with the control system upgrade mentioned previously.
Nonetheless, even if the building controls were operating
properly it does not appear that there are provisions in place
to reduce the unoccupied temperatures of the building. It is
recommended that the daytime space temperatures for
Elim Aniguiin K-12 School Comprehensive Energy Audit
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most spaces be set to 72 degrees F and that the nighttime
setpoint be set to 60 degrees F. The lower nighttime
setback will save approximately $8,346 per year.
e. Add Occupancy Sensors for Lighting: Most of the interior,
occupied spaces are equipped with occupancy sensors for
operating lighting. However the kitchen, cafeteria and
restrooms are not but can be provided with some. The
annual lighting energy savings will be about 6% with a
payback of approximately 5 years.
f. Upgrade Exterior Lighting: There are 9 exterior wall
mounted light fixtures that use high pressure sodium (HPS)
lamps at 150 watts each 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 only will be
approximately 6.5% and have a payback of about 7.4 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. Consider replacing 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
Elim Aniguiin K-12 School Comprehensive Energy Audit
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to ensure that unseen lighting is not accidentally left on for
long periods of time such as summer break.
5. Install an illuminated indicator to show if crawlspace lighting
is on. It is not practical to install occupancy sensors in the
crawlspace due to the large area. However small light
bulbs or illuminated switchs could be installed on the walls
just above the crawlspace access hatches to indicates if the
lighting is on. This will help to reduce the likelihood of
crawlspace lights accidentally being left on.
6. Disconnect refrigeration equipment over the summer,
including walk$in units and residential style refrigerators
throughout the building. This will save approximately
$1,900/year.
The priority recommendations in the detailed report are estimated to
save $17,113/year, with an installed cost of $71,256, for a 4.2 year
payback. This does not include design or CA services, but overall it
does indicate a cost effective energy savings program.
3. Audit and Analysis Background:
a. Program Description: This audit included services to identify,
develop, and evaluate energy efficiency measures at the
subject building. The scope of this project included evaluating
the building shell, lighting, other electrical systems, and
heating, ventilating, and air conditioning (HVAC) equipment.
Measures were selected such that an overall simple payback
period of 8 years or less could be achieved.
b. Audit Description and Methodology: Preliminary audit
information was gathered in preparation for the site survey,
including benchmark utility consumption data, floor and lighting
plans, and equipment schedules where available. A site visit
was performed to inventory and evaluate the actual building
condition, including:
i. Building envelope (roof, windows, etc)
ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
Elim Aniguiin K-12 School Comprehensive Energy Audit
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v. Plumbing systems
c. Method of Analysis: The information gathered prior to the site
visit and at the site visit is entered into AkWarm$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
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.
Elim Aniguiin K-12 School Comprehensive Energy Audit
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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.
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
Elim Aniguiin K-12 School Comprehensive Energy Audit
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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
performed some of the audits to assure current knowledge of
existing conditions.
5. Building Description and Function: The subject structure is called
the Elim Aniguiin School, which was constructed in 2002. The
building serves as a kindergarten through twelfth grade (K$12)
educational facility, which includes classrooms, administrative offices,
a commercial kitchen, a multi$purpose room/cafeteria, a gymnasium,
locker rooms, vocational education room with shop, restrooms, and
multiple storage and utility spaces. The building is a one story
structure with an enclosed mechanical mezzanine above the locker
rooms and an insulated crawlspace below the entire building footprint
except the gymnasium. The gymnasium, student shop, and two
classroom “commons” have high ceilings extending to the underside
of the roof. Hallways have 9.5 feet ceilings. Classrooms, offices,
locker rooms, the kitchen and various storage and utility rooms have
ceilings heights ranging from 8 to 10 feet. The crawlspace averages
about 3.25 feet in height and is about 75% below grade. The building
roof and exterior walls are constructed of structural insulated panels
(SIPs) and the exteriors are covered with metal roofing and metal
siding respectively. The roof insulation value is approximately R$53
and the exterior walls approximately R$44. The overall building design
and construction is similar to many schools that have been built in
Western Alaska in the last 5 to 10 years. The building is in very good
condition overall and appears to operate more or less as designed.
The building is occupied from the middle of August through the middle
of May. The school is unused during the summer months.
Elim Aniguiin K-12 School Comprehensive Energy Audit
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a. Heating System: The school heating plant is in a detached
utility building located northwest and adjacent to the school on
the school property. Heat is delivered to the school through a
utilidor below grade that enters the school building in the north
corner of the building under the Dry Storage room. The
building heating system consists of two Burnham V$908A cast
iron sectional boilers with Carlin model 702CRD, two$stage
burners. The boilers provide heat to the school and utility
buildings only. The boilers are original to the 2002 school
construction. Hot glycol is circulated around the building using
two Grundfos model UPS 50$240, 3$speed circulators, set at
the highest speed, each with a 2 HP motor. A third pump is
also installed as a back up in the event that one of the two
main pumps goes down. The two main pumps operate in lead$
lag fashion. The lead pump operates by itself as long as it is
able to maintain pressure and temperature within the heating
loop. When the lead pump is not able to keep up by itself the
lag pump runs. The pumps are not equipped with variable
frequency drives (VFD), so they run at full speed when they
operate. The lead pump runs constantly, year round. Heat is
distributed throughout the building using fintube baseboard in
most perimeter and some interior spaces, cabinet unit heaters
in the gymnasium, vestibules, and crawlspace, unit heaters in
utility spaces, and some supplemental heat through tempered
ventilation air.
b. Ventilation System: There are three air handlers in the
building as well as multiple exhaust and relief fans. HVU$1 is
the air handler that serves the classrooms and administrative
spaces in the building. HVU$2 serves the multipurpose room
and also provides make$up air for the kitchen cooking line
exhaust hood. HVU$3 serves the gymnasium. RF$1 is the
return/relief fan for HVU$1 and is interlocked to operate with
that unit. RF$3 is the return/relief fan for HVU$3 and is
interlocked to operate with that unit. EF$1 is the general
building exhaust fan and is interlocked to operate with HVU$1.
EF$2 is the cooking line exhaust hood fan and is interlocked to
operate with HVU$2. Other exhaust fans include the
commercial dishwasher hood, small restroom fan and (3)
Elim Aniguiin K-12 School Comprehensive Energy Audit
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residential range hoods. A wall$mounted propeller fan
provides ventilation for the boiler utility building. Heating of
ventilation (outside) air is a significant source of energy
consumption for commercial buildings. 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, column style “gang” showers, classroom
sinks, mop sinks, and large sinks for cooking. Most fixtures
are located in bathrooms, locker rooms, custodial closets and
the commercial kitchen. Classrooms for the younger
elementary school children have adjoining water closets and
lavatories as well as sinks in the classroom.
d. Domestic Hot Water: How water is generated using three
indirect water heaters, each with a holding capacity of 120
gallons. 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.
e. Lighting: Typical lighting used throughout occupied spaces in
the building is provided with T$8 fluorescent fixtures using
electronic ballasts and controlled with occupancy sensors.
Most occupied rooms also have two toggle switches for two
levels of lighting with minimum lighting levels at 30$50%
depending on 3$ or 4$lamp fixtures. Occupancy sensors only
turn on one level of lighting where two levels exist. The
gymnasium has high bay lighting fixtures with (5) 2$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 (50 watts) fixtures.
Exterior lights operate using daylight sensors.
Elim Aniguiin K-12 School Comprehensive Energy Audit
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f. Fire Sprinkler: The building is equipped with a fire sprinkler
protection system throughout. A fire sprinkler water storage
tank, approximately 10,000 gallons in capacity, is installed in
the utility building.
6. Historic Energy Consumption: Energy consumption is modeled
within the AkWarm$C program. The program only analyzes 12
months of data, so where 24 months of data are available, the data is
averaged and input to AkWarm$C to provide more accuracy. The
energy consumption data is presented and graphed in the attached
AkWarm$C program results.
Based on the benchmark energy data for 2009 and 2010, the average
electric consumption for the building was 164,055 kWh/year at an
average cost of $92,428/year. The average fuel oil consumption was
11,902 gallons/year, at an average annual cost of $41,806/year.
7. Energy Efficiency Measures Considered or Recommended: The
building was examined for application of a multitude of potential EEMs
that are discussed below. Those EEMs that appear to have an
application for the subject building are further analyzed for estimated
payback periods, either within the AkWarm$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
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. Exterior Lighting Upgrade: High$intensity discharge (HID)
fixtures, such as high pressure sodium (HPS), are commonly
used for building exterior lighting in Alaska because they
perform well in cold weather and are more efficient than many
other types of lighting. However, light emitting diode (LED)
fixtures are proving to be a viable alternative to HPS. LED
fixtures use nano reflector technology with drivers offering
50,000 hours life, about 6 years, as compared to only 20,000
Elim Aniguiin K-12 School Comprehensive Energy Audit
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hours with high$intensity discharge (HID) fixtures. LED fixtures
offer the instant$on feature of fluorescent fixtures but use
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 $40 deg F (actual installations
in Antarctica and Fairbanks indicate they operate at lower
temperatures as well) depending on manufacturer. The
proposed LED fixtures are dark sky compliant, using 100%
cutoff optics to reduce light pollution. LEDs provide a different
type of light than HPS, both in color and lumen output, that has
the effect of providing a clearer, brighter light while using less
power than a HPS bulb. The following chart indicates energy
savings for various exterior building mounted light fixtures (MH
Metal Halide; HSP High Pressure Sodium) using Scotopic
lighting measurements:
HID Lamp
HID
System
Wattage
LED
System
Wattage
Energy
Savings
(%)
150W HPS 188W 54W 71
b. HVAC Control: The building HVAC system is operated using
pneumatic controls. This method of control utilizes air in
pressurized tubing to monitor environmental conditions and
actuate equipment. The power behind the system is an air
compressor that operates as needed to maintain pressure in
the tubing. By its very nature a pneumatic control system has
inherent inefficiencies, namely the need to continually re$
pressurize the system. As sensors and actuators operate they
release air from the pressurized tubing, which is how they are
designed to work. Loose fittings, damaged pipe, broken
equipment all contribute to air escaping from the system. As a
result the air compressor will operate intermittently throughout
the life of the system. As the system’s integrity degrades over
time more air leaks occur and the compressor operates more
frequently. Failures in the system often leads to equipment
“running wild” $ operating at full capacity with no ability to make
Elim Aniguiin K-12 School Comprehensive Energy Audit
16
adjustments. This is likely the cause of the heating problem in
a number of the classrooms, where the maintenance man
reduced the space temperatures to 60 degrees F because
occupants were complaining that the rooms were too hot.
Under these circumstances occupants will typically open
windows, which releases heat from the building and wastes
energy. Pneumatic control systems require a level of training
to operate and maintain that is difficult to provide to onsite
personnel given the remote nature of the location and frequent
and/or sudden turn over of maintenance staff. The remote
location also makes it costly to hire contractors to come and
maintain and/or repair the pneumatic control system. For
these reasons it is recommended that the pneumatic control
system be demolished and an electronic control system be
installed. This will require the installation of new thermostats
and sensors, actuators, valve motors, control panel(s) and low
(24) voltage wiring throughout the building. Most of the wiring
can be installed in the crawlspace and above suspended
ceilings, making for a simpler installation and cleaner
appearance. Pneumatic equipment that is being replaced will
need to be removed. Items such as tubing and fittings that are
out of site and not conflicting with new equipment can be
abandoned in place.
c. Ventilation Control: The air handling units (HVU) serving the
various school spaces were designed to function using time
clocks and electrical connections with other fans. Even though
the time clocks appear to be functional the HVUs are operated
manually, turned on and off daily by maintenance personnel
based on their knowledge of space occupancy. This creates
two problems. First, in the event that a unit is not turned on the
school will not have adequate ventilation air, which will affect
occupant comfort and performance. Second, if a unit is left on
outside of school hours it is a waste of energy. There are two
adjustments that can be made at the same time that will
improve control of the HVUs.
i. Operation Schedules: Each of the HVUs serves a
space (or spaces) with unique occupancy schedules.
Elim Aniguiin K-12 School Comprehensive Energy Audit
17
During the course of the audit the time clocks were
observed and it appeared that there were two
programmed schedules in use; one for the classrooms
and administration and the other for the gymnasium.
What was most significant about the scheduling was that
it did not accurately track the hours that the spaces were
in use. In order to reduce the amount of electric and
heating energy used by the HVUs the following
scheduling changes are recommended:
1. HVU1, Classrooms and Administration –
Operate the unit only during school hours.
2. HVU2, Kitchen Exhaust MakeUp Air – This unit
is interlocked with the kitchen cooking hood
exhaust fan, EF$2, to serve as make$up air. It can
also be operated independent of EF$2 using a
spring wound manual override timer located in the
multi$purpose room. The existing timer should be
replaced with an electronic timer and provided with
a locking cover so it can only be operated by
building staff. The spring in the spring wound timer
will eventually fail and the timer will no longer shut
off automatically, making it possible for the HVU to
“run wild” if not manually turned off.
3. HVU3, Gymnasium – Operate the unit during
known periods of occupancy such as lunch hours
and scheduled “open gym” hours. The existing
spring wound manual override timer in the
gymnasium should be replaced with an electronic
timer and provided with a locking cover so it can
only be operated by building staff.
ii. 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
Elim Aniguiin K-12 School Comprehensive Energy Audit
18
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 HVUs, and the
HVU outside air dampers can be modulated to increase
or decrease the outside air delivered to the building.
This modification applies specifically to HVU$3 and may
also be appropriate for HVU$1.
d. VFD Heating Pumps: In most cases heating circulators are
designed for greater flow rates than is needed during normal
operation. Bypass valves are installed to allow the constant
volume of flow to continue even when a small amount of that
flow is providing heat. Energy is wasted circulating heated
glycol that is not needed. There are a number of pumps on
the market that have variable frequency drives (VFD), which
allow the speed of the motor to be adjusted to match the flow
rate demand. Pump affinity laws show that motor speed and
power have a cubic mathematical relationship to each other.
As the pump speed is reduced “X” RPM the power
consumption is reduced by X1/3 watts (or horsepower), showing
that a small change in pump speed has an amplified affect on
power input. Operating pumps at lower speeds when there is
lower flow demand significantly reduces power consumption. It
is recommended that the heating circulators be replaced with
VFD pumps so power savings can be realized.
e. Boiler Temperature Outdoor Air Reset: As the outside air
temperature varies building heat loss varies as well, losing
heat at a faster rate as the ambient temperature drops. Boiler
systems are typically sized to meet the heating demands of the
Elim Aniguiin K-12 School Comprehensive Energy Audit
19
coldest expected temperatures. These extreme temperatures
may only occur for short durations in a given winter and will
vary in frequency and length year to year. Most cast iron
sectional boilers supply heating water at the same temperature
year$round. During periods of warmer weather in the heating
season high heating water supply temperatures may cause
space temperatures to overshoot setpoints 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 was observed
on site that maintenance personnel were manually adjusting
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
providing inadequate heating water temperatures for the hot
water generators), or 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. Domestic Hot Water Recirculation: The domestic hot water
system is provided with a small pump that circulates the hot
water loop back to the water heater so there is always hot
water available at the furthest fixtures in the building. This
pump operates constantly, which is unnecessary since hot
water is only needed during building occupancy. It is
Elim Aniguiin K-12 School Comprehensive Energy Audit
20
recommended that controls be provide for the hot water
recirculation pump so it will only run during school hours, which
will reduce the energy consumed by the pump.
g. Waste Heat: The school building is not currently supplied with
waste heat. However the school is roughly 0.5 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.
h. 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 on the boiler fuel line and another on
the generator fuel line. 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. This information
can be tied into the building DDC system and saved as trend
log data and/or the meter can have an analog dial for visual
inspection. Any ESCO contract, or AHFC financed contract
will require fuel metering to verify paybacks of energy
conservation measures. Electronic turbine meters are also
Elim Aniguiin K-12 School Comprehensive Energy Audit
21
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;
Elim Aniguiin K-12 School Comprehensive Energy Audit
22
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.
Elim Aniguiin K-12 School Comprehensive Energy Audit
23
Appendix A: Photos
Main Entrance and Classrooms
Southwest entrance
Elim Aniguiin K-12 School Comprehensive Energy Audit
24
Southwest wall of Gymnasium, Northwest Classrooms
Northwest wall of Gymnasium
Elim Aniguiin K-12 School Comprehensive Energy Audit
25
Multipurpose Room, Kitchen, Gymnasium in background, Utility
Building, Northeast view
Kindergarten Classroom, Northeast view
Elim Aniguiin K-12 School Comprehensive Energy Audit
26
Typical Classroom
Elim Aniguiin K-12 School Comprehensive Energy Audit
27
Gymnasium, Southwest wall
Gymnasium, Southeast wall with HVU3 ductwork
Elim Aniguiin K-12 School Comprehensive Energy Audit
28
Kitchen cooking equipment under exhaust hood
Kitchen dish washing equipment
Elim Aniguiin K-12 School Comprehensive Energy Audit
29
Kitchen walk in refrigerator and freezer
Typical Fan Room air handler (HVU2 shown)
Elim Aniguiin K-12 School Comprehensive Energy Audit
30
Indirect Hot Water Heaters in Fan Room (three total)
HVAC pneumatic control panel and air compressor in Fan Room
Elim Aniguiin K-12 School Comprehensive Energy Audit
31
Pneumatic control panel
Air compressor
Elim Aniguiin K-12 School Comprehensive Energy Audit
32
Utility Building, Northeast and Southeast walls, intermediate fuel tank
Utility Building, Northwest and Southwest walls
Elim Aniguiin K-12 School Comprehensive Energy Audit
33
Heating Boilers and Circulation Pumps in Utility Building
Elim Aniguiin K-12 School Comprehensive Energy Audit
34
Elim Village, Aerial View Village Power Utility School
Elim Aniguiin K-12 School Comprehensive Energy Audit
35
Appendix B: AK Warm Energy Model
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin 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
$780 $1 4432.63 0
2 Refrigeration:
Domestic
Refrigerator 2-door
Add new Seasonal
Shutdown
$240 $1 1535.25 0
3 Refrigeration:
Mobile refrigerator
in kitchen
Add new Seasonal
Shutdown
$130 $1 735.63 0
4 Setback Thermostat:
134 Gymnasium
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 134 Gymnasium space.
$1,250 $750 25.01 0.6
5 Setback Thermostat:
146 Science
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 146 Science Classroom
space.
$561 $750 11.22 1.3
6 Setback Thermostat:
148 Social Studies
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 148 Social Studies
Classroom space.
$531 $750 10.62 1.4
7 Setback Thermostat:
108 Primary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108 Primary Classroom
space.
$525 $750 10.50 1.4
8 Setback Thermostat:
110 Kindergarten
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 110 Kindergarten
Classroom space.
$517 $750 10.35 1.5
9 Other Electrical: Air
Compressor
Replace with Demolished $840 $500 9.59 0.6
10 Setback Thermostat:
126 Dry Storage
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 126 Dry Storage space.
$462 $750 9.25 1.6
11 Setback Thermostat:
141 Itinerant
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 141 Itinerant
Classroom space.
$446 $750 8.93 1.7
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
12 Setback Thermostat:
153 Library
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 153 Library space.
$313 $750 6.26 2.4
13 Setback Thermostat:
107 Intermediate
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 107 Intermediate
Classroom space.
$306 $750 6.13 2.4
14 Setback Thermostat:
109 Primary
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 109 Primary Classroom
space.
$285 $750 5.70 2.6
15 Lighting: Kitchens,
Type B - Lithonia
2SP-GB-432-A12125-
120-GEB10
Remove Manual Switching
and Add new Occupancy
Sensor
$409 $500 5.22 1.2
16 Setback Thermostat:
106 intermediate
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 106 intermediate
Classroom space.
$250 $750 5.01 3
17 Setback Thermostat:
120 Cafeteria
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 120 Cafeteria space.
$248 $750 4.97 3
18 Setback Thermostat:
121 Kitchen
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 121 Kitchen space.
$220 $750 4.41 3.4
19 Setback Thermostat:
138 Bi-Cultural
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 138 Bi-Cultural
Classroom space.
$203 $750 4.06 3.7
20 Setback Thermostat:
149 Language Arts
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 149 Language Arts
Classroom space.
$200 $750 4.00 3.8
21 Setback Thermostat:
147 Mathematics
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 147 Mathematics
Classroom space.
$166 $750 3.32 4.5
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 5
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
22 Setback Thermostat:
150 Computer
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 150 Computer
Classroom space.
$158 $750 3.16 4.8
23 Setback Thermostat:
140 Home Ec.
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 140 Home Ec.
Classroom space.
$128 $750 2.56 5.9
24 Setback Thermostat:
104 CSLs Office
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 104 CSLs Office space.
$118 $750 2.37 6.3
25 Setback Thermostat:
151 Conference
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 151 Conference Room
space.
$112 $750 2.24 6.7
26 HVAC And DHW Change heat loop circ.
pumps to VFD, run
domestic hot water recirc.
pump on time clock or
temp. sensor
$3,766 $20,000 2.18 5.3
27 Setback Thermostat:
139 Special Needs
Classroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 139 Special Needs
Classroom space.
$118 $750 2.36 6.3
28 Setback Thermostat:
125 Customer
Loading
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the 125 Customer Loading
space.
$96 $750 1.93 7.8
29 Setback Thermostat:
102 Reception
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 102 Reception space.
$96 $750 1.91 7.8
30 Setback Thermostat:
103 Principal Office
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 103 Principal Office
space.
$93 $750 1.86 8
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 6
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
31 Lighting: Restrooms,
Type H - Lithonia
VDS232-120-GEB10-
WL
Remove Manual Switching
and Add new Occupancy
Sensor
$1,291 $4,750 1.74 3.7
32 Lighting: Kitchens,
Type B - Lithonia
2SP-GB-432-A12125-
120-GEB10
Remove Manual Switching
and Add new Occupancy
Sensor
$124 $500 1.44 4
33 Lighting: Caffetria,
Type O - Linear
D675-B-2T8-120-
PBL-C60-BW-GEB10-
8'
Remove Manual Switching
and Add new Occupancy
Sensor
$111 $500 1.41 4.5
34 Setback Thermostat:
118 Corridor
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 118 Corridor space.
$59 $750 1.18 12.7
35 Lighting: Exterior
Wall Mount, Type M
- Lithonia TWP-150S-
120-SF-70F
Replace with 9 LED 72W
Module StdElectronic
$1,827 $13,500 0.86 7.4
36 Lighting: Cafeteria,
Type O - Linear
D675-B-2T8-120-
PBL-C60-BW-GEB10-
8'
Remove Manual Switching
and Add new Occupancy
Sensor
$64 $500 0.74 7.8
37 Setback Thermostat:
101 Main Commons
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 101 Main Commons
space.
$31 $750 0.62 24.2
38 Lighting: Restrooms,
Type H - Lithonia
VDS232-120-GEB10-
WL
Remove Manual Switching
and Add new Occupancy
Sensor
$23 $250 0.54 10.8
39 Setback Thermostat:
144 Corridor
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 144 Corridor space.
$10 $750 0.19 77.5
40 Lighting: Exercise,
Type O - Linear
D675-B-2T8-120-
PBL-C60-BW-GEB10-
8'
Remove Manual Switching
and Add new Occupancy
Sensor
$6 $250 0.16 39.6
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 7
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
41 Setback Thermostat:
111 Elementary
Commons
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 111 Elementary
Commons space.
$0 $750 0.00 Infinity
42 Setback Thermostat:
114 Girls Restroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 114 Girls Restroom
space.
$0 $750 0.00 Infinity
43 Setback Thermostat:
116 Boys Restroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 116 Boys Restroom
space.
$0 $750 0.00 Infinity
44 Setback Thermostat:
105 Faculty
Workroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 105 Faculty Workroom
space.
$0 $750 0.00 Infinity
45 Setback Thermostat:
128 Exercise Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 128 Exercise Room
space.
$0 $750 0.00 Infinity
46 Setback Thermostat:
127 Kitchen
Administration
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 127 Kitchen
Administration space.
$0 $750 0.00 Infinity
47 Setback Thermostat:
132 Boys Locker
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 132 Boys Locker Room
space.
$0 $750 0.00 Infinity
48 Setback Thermostat:
133 Mens Toilet
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 133 Mens Toilet space.
$0 $750 0.00 Infinity
49 Setback Thermostat:
135 Womens Toilet
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 135 Womens Toilet
space.
$0 $750 0.00 Infinity
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 8
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
50 Setback Thermostat:
136 Girls Locker
Room
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 136 Girls Locker Room
space.
$0 $750 0.00 Infinity
51 Setback Thermostat:
156 Girls Bathroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 156 Girls Bathroom
space.
$0 $750 0.00 Infinity
52 Setback Thermostat:
158 Boys Bathroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 158 Boys Bathroom
space.
$0 $750 0.00 Infinity
53 Setback Thermostat:
154 High School
Commons
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 154 High School
Commons space.
$0 $750 0.00 Infinity
54 Refrigeration: Walk
in
Refrigerator/Freezer
Replace with Walk in
refrigerator/freezer
$0 $1 0.00 Infinity
55 Refrigeration:
Mobile refrigerator
in kitchen
Replace with Mobile
refrigerator in kitchen
$0 $1 0.00 Infinity
56 Refrigeration:
Domestic
Refrigerator 2-door
Replace with 4 Domestic
Refrigerator 2-door
$0 $1 0.00 Infinity
TOTAL $17,113 $71,256 2.7 4.2
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R:Value Recommendation Type/R:
Value
Installed
Cost
Annual
Energy
Savings
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 9
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
26 Change heat loop circ. pumps to VFD, run domestic hot water recirc. pump on time
clock or temp. sensor
$20,000 $3,766
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
4 134 Gymnasium Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 134 Gymnasium space.
$750 $1,250
5 146 Science
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 146 Science Classroom
space.
$750 $561
6 148 Social Studies
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 148 Social Studies
Classroom space.
$750 $531
7 108 Primary
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 108 Primary Classroom
space.
$750 $525
8 110 Kindergarten
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 110 Kindergarten
Classroom space.
$750 $517
10 126 Dry Storage Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 126 Dry Storage space.
$750 $462
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 10
11 141 Itinerant
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 141 Itinerant
Classroom space.
$750 $446
12 153 Library Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 153 Library space.
$750 $313
13 107 Intermediate
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 107 Intermediate
Classroom space.
$750 $306
14 109 Primary
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 109 Primary Classroom
space.
$750 $285
16 106 intermediate
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 106 intermediate
Classroom space.
$750 $250
17 120 Cafeteria Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 120 Cafeteria space.
$750 $248
18 121 Kitchen Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 121 Kitchen space.
$750 $220
19 138 Bi-Cultural
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 138 Bi-Cultural
Classroom space.
$750 $203
20 149 Language Arts
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 149 Language Arts
Classroom space.
$750 $200
21 147 Mathematics
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 147 Mathematics
Classroom space.
$750 $166
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 11
22 150 Computer
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 150 Computer
Classroom space.
$750 $158
23 140 Home Ec.
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 140 Home Ec.
Classroom space.
$750 $128
24 104 CSLs Office Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 104 CSLs Office space.
$750 $118
25 151 Conference
Room
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 151 Conference Room
space.
$750 $112
27 139 Special Needs
Classroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 139 Special Needs
Classroom space.
$750 $118
28 125 Customer
Loading
Existing Unoccupied Heating
Setpoint: 60.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 55.0 deg F for
the 125 Customer Loading
space.
$750 $96
29 102 Reception Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 102 Reception space.
$750 $96
30 103 Principal Office Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 103 Principal Office
space.
$750 $93
34 118 Corridor Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 118 Corridor space.
$750 $59
37 101 Main
Commons
Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 101 Main Commons
space.
$750 $31
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 12
39 144 Corridor Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 144 Corridor space.
$750 $10
41 111 Elementary
Commons
Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 111 Elementary
Commons space.
$750 $0
42 114 Girls Restroom Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 114 Girls Restroom
space.
$750 $0
43 116 Boys Restroom Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 116 Boys Restroom
space.
$750 $0
44 105 Faculty
Workroom
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 105 Faculty Workroom
space.
$750 $0
45 128 Exercise Room Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 128 Exercise Room
space.
$750 $0
46 127 Kitchen
Administration
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 127 Kitchen
Administration space.
$750 $0
47 132 Boys Locker
Room
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 132 Boys Locker Room
space.
$750 $0
48 133 Mens Toilet Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 133 Mens Toilet space.
$750 $0
49 135 Womens Toilet Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 135 Womens Toilet
space.
$750 $0
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 13
50 136 Girls Locker
Room
Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 136 Girls Locker Room
space.
$750 $0
51 156 Girls Bathroom Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 156 Girls Bathroom
space.
$750 $0
52 158 Boys Bathroom Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 158 Boys Bathroom
space.
$750 $0
53 154 High School
Commons
Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the 154 High School
Commons space.
$750 $0
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
15 Kitchens, Type B -
Lithonia 2SP-GB-
432-A12125-120-
GEB10
19 FLUOR (4) T8 4' F32T8 32W
Standard (2) Instant
StdElectronic with Manual
Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$500 $409
31 Restrooms, Type H
- Lithonia VDS232-
120-GEB10-WL
32 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$4,750 $1,291
32 Kitchens, Type B -
Lithonia 2SP-GB-
432-A12125-120-
GEB10
10 FLUOR (4) T8 4' F32T8 32W
Standard (2) Instant
StdElectronic with Manual
Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$500 $124
33 Caffetria, Type O -
Linear D675-B-2T8-
120-PBL-C60-BW-
GEB10-8'
6 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$500 $111
35 Exterior Wall
Mount, Type M -
Lithonia TWP-150S-
120-SF-70F
9 HPS 150 Watt Magnetic with
Daylight Sensor
Replace with 9 LED 72W
Module StdElectronic
$13,500 $1,827
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Elim Aniguiin School
Page 14
36 Cafeteria, Type O -
Linear D675-B-2T8-
120-PBL-C60-BW-
GEB10-8'
6 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$500 $64
38 Restrooms, Type H
- Lithonia VDS232-
120-GEB10-WL
FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$250 $23
40 Exercise, Type O -
Linear D675-B-2T8-
120-PBL-C60-BW-
GEB10-8'
6 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$250 $6
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 $780
2 Domestic
Refrigerator 2-door
4 Domestic Refrigerator 2-door Add new Seasonal
Shutdown
$1 $240
3 Mobile refrigerator
in kitchen
Mobile refrigerator in kitchen Add new Seasonal
Shutdown
$1 $130
54 Walk in
Refrigerator/Freeze
r
Walk in refrigerator/freezer Replace with Walk in
refrigerator/freezer
$1 $0
55 Mobile refrigerator
in kitchen
Mobile refrigerator in kitchen Replace with Mobile
refrigerator in kitchen
$1 $0
56 Domestic
Refrigerator 2-door
4 Domestic Refrigerator 2-door Replace with 4 Domestic
Refrigerator 2-door
$1 $0
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
9 Air Compressor Quincy Air Control with Other
Controls
Replace with Demolished $500 $840
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
Elim Aniguiin K-12 School Comprehensive Energy Audit
48
Appendix C: Existing Plans