HomeMy WebLinkAboutBSNC-TLA-RSA James Isabell School 2012-EE
Richard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
James C. Isabell School
Teller, Alaska
Project # BSNC-TLA-RSA-01
Prepared for:
Bering Strait School District
March 1, 2012
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C-6
Anchorage, Alaska 99501
&
RSA Engineering, Inc.
2522 Arctic Boulevard, Suite 200
Anchorage, Alaska 99503
ii
TABLE OF CONTENTS
1. Executive Summary 1
2. Audit and Analysis Background 7
3. Acknowledgements 8
4. Building Description & Function 9
5. Historic Energy Consumption 14
6. Energy Efficiency Measures Considered 14
7. Interactive Effects of Projects 14
8. Loan Program 15
Appendix A - Photos 16
Appendix B - AkWarm-C Report 22
Appendix C - Building Plans & Equipment Schedules 42
Submitted by:
_______________________________
Nathan P. Zeigler, PE, CEA
_______________________________
Richard S. Armstrong, PE, CEM, CEA
Date: March 7th, 2012
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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
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Investment Grade Energy Audit
James C. Isabell School
Teller, Alaska
1. Executive Summary:
This comprehensive Energy Audit is performed in connection with AHFC’s
Retrofit Energy Assessment for Loans (REAL) program.
Select Building:
James C. Isabell School
100 Airport Avenue
Teller, Alaska 99778
Building Owner:
Bering Strait School District (BSSD)
School District Contact:
Bob Dickens, Director Facilities
(907) 624%3611 ext. 4249; bdickens@bssd.org
Building Contact:
Susette Carroll, School Principal
(907) 642%3041
The James C. Isabell School was originally constructed in 2004. In 2006 the
adjacent existing elementary building was converted into 4 apartments for
teacher housing. All building and water heating for the apartment building
teacher housing is provided by the James C. Isabell School through a utilidor. In
2011 two new teacher housing buildings were constructed along the southeast
side of the James C. Isabell School. Water, sewer and utilidor heat trace for the
new teacher housing buildings are provided from the James C. Isabell school.
The houses contain their own fuel oil tanks and heating system. Fuel oil for the
housing is provided by the School District. At the time of the site visit for this
audit, the two new teacher houses were under construction and nearing
completion. No plans are available for the renovation of the elementary building
into four teacher housing apartments, or for the two new teacher housing
buildings.
This energy audit focuses solely on the James C. Isabell School; however, it is
important to note that unmetered connections of utilities from the school to the
adjacent teacher housing has a significant effect on the overall energy usage of
the school. The site visit and inspection for this energy audit was conducted on
October 4th, 2011.
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Table 1
2009 2009 2010 2010
Utility Consumption Cost/Year Consumption Cost/Year
Electricity%kWh 223,381 $146,286 217,516 $107,718
Oil Consumption
(Therms) 28,974 $84,477 23,068 $54,099
Total Energy
(kBtu) 3,659,799 $230,763 3,049,214 $161,817
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. In order to develop the most
accurate EUI and ECI comparisons possible, only Bering Strait Schools in
remote communities were used to develop the baseline averages. This allows
for similar energy cost, facility usage, and climate comparison between the
subject school and the benchmark average. The EUI and ECI baseline averages
are comprised of 16 schools and two years worth of data (2009 & 2010). The
comparative values for the subject building are listed in Table 2 below:
Table 2
James C. Isabell
School
Bering Strait Remote
Community School Ave
Energy Use Index (EUI)
kBTU/SF Avg 2009, 2010 152.2 124.6
Energy Cost Index (ECI)
Average 2009, 2010 $8.91 $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. Exterior Lighting Upgrades: Replace all exterior building wall mounted HID
fixtures with new dark sky compliant LED type wall mounted light fixtures:
LED technology has come a long way, and for applications like this, LED
lights are ready for prime time. LED fixtures use nano reflector technology
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with drivers offering 50,000 hours life. That equates to about 6 years, as
compared to only 20,000 hours with HID fixtures. LED fixtures offer the
instant%on feature of fluorescent, but use significantly less energy than the
HID fixtures. LED lamps like the cold, 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 by using
100% cutoff optics to reduce light pollution. The following chart indicates
energy savings for the various exterior building mounted light fixtures
(HSP High Pressure Sodium) using Scotopic lighting measurements:
HID Lamp HID
System
Wattage
LED
System
Wattage
Energy
Savings
(%)
70W HPS 105W 27W 74
250W HPS 300W 108W 64
b. Replace selected interior metal halide (MH) high intensity discharge (HID
fixtures with new T%5 high output fluorescents: Replace selected interior
metal halide (MH) high intensity discharge (HID) fixtures with new T%5 high
output fluorescents: Now a new generation of smaller, very bright T%5
fluorescent fixtures are available that can improve energy efficiency of the
fixtures by up to 30% over metal halide fixtures. The existing HID lights
have undesirable features, such as a long re%strike time, which means
that they take several minutes to come back on after being turned off.
Because of this, users typically simply leave the HID lamps on all day if
they will be going in and out of a building or space. Additionally, metal
halide lamps, have serious lamp output depreciation over time,
continuously putting out less and less light. Over the lifetime of the metal
halide lamp, the light output depreciates about in half. The T%5
fluorescent lamps, on the other hand, maintain at least 90% of their initial
lumen output throughout the life of the lamp, so over time they offer much
more light for the power they consume. Additionally, the linear fluorescent
lamps provide improved lighting uniformity in the space, and reduced
shadows. They also provide improved appearance in the space and have
a perceived higher light level. The proposed lights could be switched
on/off with occupancy sensors since they are instant on, for a dramatic
reduction in energy use during non%occupied times.
c. Occupancy Sensor Lighting Control Upgrades: Occupancy sensors have
evolved over the years to now be more reliable, and have fewer false
starts and stops. Dual technology occupancy sensors combine passive
infrared (PIR) and ultrasonic technologies into one unit to achieve precise
coverage and to eliminate false triggers. The sensors can be mounted on
the wall in place of the existing light switch, or on the ceiling where more
uniform coverage and detection is desired in a larger room.
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Wall switch type automatic occupancy sensors are appropriate for small
rooms, such as utility rooms, one person toilet rooms, small open offices,
and places where the wall switch is located such that occupants can be
detected with line%of%sight from anywhere in the room. They can turn
lights on and off based on both occupancy and ambient light levels.
Devices in break rooms, utility rooms, storage rooms, small offices, and
small open (non%partitioned) bathrooms can save up to 60% of the cost of
the lighting where rooms are infrequently used, but the lights are typically
left on.
Dual technology occupancy sensors should be used in larger spaces,
such as warehouses or equipment shops if the HID metal halide lighting
fixtures are replaced with T%5 HO fluorescent fixtures that can light up
instantly, again offering a very fast payback, depending on the frequency
of use in the room.
d. Provide VFD controls for hydronic circulators: Hydronic circulators typically
operate 24/7, so VFD controls that slow the pump down to maintain the
desired differential pressure work well, since as zone valves close, back%
pressure increases, so it can be easily controlled with a VFD device. This
is especially effective for pumps that are 1.5 HP or larger. Alternatively,
Wilo company now makes replacement circulators that have built%in VFD
and pressure sensing controls, so a simple packaged pump replacement
will upgrade to VFD control. Using an estimated worse case cost of
$16,346 per drive, the paybacks will vary to 5 years.
e. Air Handling Unit Upgrades: Install a CO2 sensor in the return air stream
of AHU%2 to reduce outside air requirements. Carbon dioxide (CO2) is a
known tracer gas for human metabolic activity, and has been recognized
by ASHRAE and code authorities as a credible way to reduce minimum
outside air (OSA) requirements in air handling units (AHUs). The CO2
sensor would drive the outside air dampers to provide return air from the
rooms with CO2 levels at or below CO2 set%point, (typically <750 PPM
CO2), thus avoiding over%ventilation of the space. The two primary
sources of heat loss from a building are conduction through the building
envelope and loss of heated air through ventilation or infiltration.
Ventilation loads approach conduction loads in well ventilated buildings
located in cold climates. Additionally, building DDC static pressure
controls should be implemented if not already in place. The payback for
this ECM is very difficult to assess without extensive historical review of
actual OSA settings, but it is estimated to save 25% of the OSA heating
requirements caused by over%ventilating. The payback cost, assuming a
cost of $1,500 to install and program each CO2 sensor, is under 2 years.
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f. Install Programmable Set%back Thermostats: Buildings that are not
continuously occupied do not require continuous heating levels at 70
degrees, so they can be set back to 55 or 60 degrees F. This is typically
done with relatively inexpensive programmable set%back thermostats or
through DDC systems. The cost of each thermostat with installation
should not exceed $250, with paybacks of one year or less in most cases.
g. Replace shower heads with ultra%low flow models: Older shower heads
delivered 3%9 gallons per Minute (GPM) of water, but over the last 10
years or so, this was reduced to 2.5 GPM as the standard for energy
conserving shower heads. Plumbing manufacturers have now developed
shower heads that will feel like 2.5 GPM or more of water is flowing, but
they will only be using 1.6 to 1.75 GPM. The design of the shower head
does not simply put in a water restriction device, but rather it uses an
innovative spray former that will concentrate the flow of water, reducing
the amount of water used, compared to standard energy saving 2.5 GPM
shower heads. This proposed shower head would yield a 30% reduction
in water, which also means a 30% reduction in hot water, saving the cost
to heat the water which is more substantial than the cost of the water
production itself. Each shower head has a retail price of around $35, so
at wholesale pricing, including shipping, as well as installation each
shower head should cost under $60, yielding a payback of one year or
less.
h. Use infra%red self%generating anti%scald automatic faucets at all public
toilet rooms: The Uniform Plumbing Code requires that all lavatories in
public restrooms be equipped with automatic start/stop faucets. Infra%red
actuated faucets have now been proven to save energy, and will be far
superior to the uncontrolled or spring loaded faucets installed in some of
the buildings. Code also now requires that lav faucets used by the public
be equipped with anti%scald protection. Some faucets observed are not
the automatic shutoff type nor are they equipped with thermal anti%scald
protection, so they will waste water and possibly burn users as well. The
newest technology infra%red faucets have self generating power using
turbines in the water flow, so no outside power (outside of a battery back%
up) is required to operate them, which makes for a very simple retrofit.
One proposed retrofit faucet is the Toto Model TEL5GSC%10 which
includes thermal mixing for scald protection as well as a 10 second
maximum flow time per cycle. The Environmental Protection Act of 1992
provides a water consumption standard of no more than 0.25 gallons of
water per cycle. The proposed faucet turns off within 1 second of users’
pulling hands away from the faucet, and also turns off after 10 seconds of
continuous use, thus discharging a maximum of 0.17 gallons of tempered
water per cycle. The cost of the faucets varies by vendors, ranging
between $433 to $637 each, so we will assume an installed cost of $700
each. It is estimated that it would take a plumber 2 hours to remove the
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old faucet and install each retrofit faucet. The estimated water savings is
30%, not to mention the safety improvement offered by having anti%scald
tempering faucets which do not presently exist. The payback for this ECM
is estimated to be under 3 years.
i. Fuel Oil Metering: In order to understand current and future fuel
consumption, a fuel meter is essential to be installed at the fuel supply to
the building, assuming the supply is piped. 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 measures. Electronic turbine
meters are also available. See
http://pathfinderinstruments.com/gpifuel.htm?gclid=CJuzvdzon6kCFSUaQ
godvgJDvQ.
j. Utility sub%metering: Currently there is no way of determining how much
energy the teacher 4%plex apartments are using. The hydronic heating for
the apartments is routed directly from the school mechanical building
without any flow and temperature metering installed. The teacher
apartment building is very old and energy inefficient. In order to
understand current and future energy usage of the school facility
accurately, it is important to have a clear picture of where the energy is
being used. With the addition of the two new teacher housing buildings in
2011, it is also recommended that the fuel oil and electricity usage of
these facilities be metered and recorded for energy tracking purposes.
Even if the school district continues to maintain and supply the utilities for
the apartment facility and the new teacher housing buildings in the future,
it is strongly recommended that the energy usage of each of the buildings
be monitored individually.
In addition to EEMs, various Energy Conservation Measures (ECMs) are
recommended since they are policies or procedures that are followed by
management and employees that require no capital outlay. Examples of
recommended ECMs for this facility include:
· Turn off lights when leaving a room that is not controlled by an occupancy
sensor that automatically turns off lights.
· All doors and windows should be properly maintainedand adjusted to
close and function properly.
· Turn off computers, monitors, printers, faxes, coffee makers, etc when
leaving the office for the day.
The 48 priority recommendations in the detailed report (Appendix A) estimate to
save $53,240 /year, with an installed cost of $100,974, for a 1.9 year payback. This
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does not include design or CA services, but overall it does indicate a cost effective
energy savings program.
2. 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 is then 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 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 for implementing 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. Haakensen Electric was
consulted for some of the lighting retrofit costs. Maintenance savings are
calculated were applicable and are added to the energy savings for each
EEM.
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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.
3. Acknowledgements: We wish to acknowledge the help of numerous
individuals who have contributed information that was used to prepare this
report, including:
a. Alaska Housing Finance Corporation (Grantor): AHFC provided the
grant funds, contracting agreements, guidelines, and technical direction
for providing the audits. AHFC reviewed and approved the final short list
of buildings to be audited based on the recommendation of the Technical
Service Provider (TSP).
b. Bering Strait School District (Owner): The BSSD provided building
sizing information, two years energy billing data, building schedules and
functions, as well as building age. Special acknowledgement and thanks
are in order for Bob Dickens (BSSD Director Facilities), Susette Carroll
(James C. Isabell School Principal), and Jonathan Kakaruk (James C.
Isabell School Maintenance Supervisor) for their time and assistance
during this audit and for their contributions to this report.
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
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Straits area, and the Nana area. The firm gathered all relevant
benchmark information provided to them by Central Alaska Engineering
Company and Nortech, 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 performed some of the audits to assure current
knowledge of existing conditions.
e. RSA Engineering, Inc. (Energy Auditor): This firm specializes in
mechanical and electrical design, and has trained three of its mechanical
engineers to perform specific energy audits. All three are Certified Energy
Auditors, and have received additional training from Richard S.
Armstrong, PE, LLC to acquire further specific information regarding audit
requirements and potential EEM applications.
4. Building Description and Function: The subject structure is called the James
C. Isabell School. This facility was originally constructed in 2004. In 2006 the
adjacent existing elementary building was converted into 4 apartments for
teacher housing. All building and water heating for the apartment building
teacher housing is provided by the James C. Isabell School through a utilidor. In
2011 two new teacher housing buildings were constructed along the southeast
side of the James C. Isabell School. Water, sewer and utilidor heat trace for the
new teacher housing buildings are provided from the James C. Isabell school.
The houses contain their own fuel oil tanks and heating system. Fuel oil for the
housing is provided by the School District. At the time of the site visit for this
audit, the two new teacher houses were under construction and nearing
completion. No plans are available for the renovation of the elementary building
into four teacher housing apartments, or for the two new teacher housing
buildings.
The building is slab on grade construction and is mostly a one story structure
with a peaked roof and drop ceilings. The only second floor space utilized is the
fan room that is located above the boys locker rooms. The remainder of the
second floor area is unusable space located above the drop ceilings and below
the peaked school roof. The facility serves as the only school for the community
of Teller.
a. Heating System: The building heating system consists of three Burnham
V%905A cast iron oil fired boilers with Carlin Burners, model 301CRD. The
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boilers and burners are the original equipment that was installed when the
building was constructed in 2004. The boilers are used to heat the
buildings hydronic heating system, which in turn provides all of the heating
for the building through baseboard, unit heaters, heating coils in the air
handlers, and heat trace for the water and sewer lines. The hydronic
heating system is a mixture of 50% propylene glycol and 50% water to
provide freeze and burst protection to the hydronic heating piping.
The circulation of the heating system is broken up into two loops, one for
the school building and one for the teacher 4%plex apartment building.
The first heating loop is circulated by three parallel pumps (CP%1A, B, & C
(Grundfos UPS 50%240) that provides all of the heating for the school’s
heat loss and domestic hot water by means of baseboard, slab heating,
unit heaters, cabinet unit heaters, air handler coils, hydronic heat trace,
and hot water generators. CP%1A is always on and circulating, CP%1B is
controlled by an outside air thermostat, and CP%1C is a stand%by pump.
Secondary pumps are used throughout the school to provide circulation to
heating equipment from this main heating circulation loop. CP%2
(Grundfos UPS%26%64F) provides circulation for the classroom in%slab
heating loop, CP%3 (Grundfos UP%42F) provides circulation for the locker
and shower rooms in%slab heating loop, and CP%4 (Grundfos UP%42F)
provides circulation for the heat trace for the domestic water line from the
Washeteria. The second heating loop serving the teacher 4%plex
apartment building is circulated by a one pump (4 Plex Circ Pump
(Grundfos UPS 50%240%F)). This pump provides all of the heating for the
4%plex apartment’s heat loss and domestic hot water by means of
baseboard, unit heatrs, cabinet unit heaters, and hot water generators.
None of the pumps are equipped with VFD drives, so they run at full
speed at all times.
b. Ventilation System: The ventilation system for the James C. Isabell
School is composed of two main air handlers that provide the outside
ventilation air for the facility (AHU%1 and AHU%2), seven exhaust fans (EF%
1, EF%2, EF%3, EF%4, EF%5, CH, and RH), two supply air fans (SF%1 & SF%
2), one return air fan (RF%1), and five ceiling fans for destratification (one
CF%1 fan located in the dining room and four CF%2 fans located in the
gym).
AHU%1 (Trane MCCB021) provides the ventilation air for the classroom
and kitchen areas of the school. The fan is run by a 7.5 horse power
motor operating at 208 volts and three phase power. The unit is
controlled by a 7%day programmable digital time clock by Johnson
Controls. At the time of this energy audit, the time clock was flashing
12:00 and AHU%1 was not running. It is unknown how long the time clock
has not been set and the AHU%1 has not been providing any ventilation air
to the school. Discussions with school staff reveal that the the school
11
experiences frequent brownouts which may be affecting the controls for
AHU%1. Steps need to be taken to correct the controls to maintain their
settings in the event of brown%outs to insure proper operation of the
schools ventilation system.
AHU%1 should be set to operate from 8:00 am % 4:00 pm Monday through
Friday, 11:00 am – 5:00 pm Saturday and remain off on Sunday. The
minimum outside air setpoint for AHU%1 is 2,000 CFM. AHU%1 is
interlocked with EF%1, EF%3, and RF%1 so that these fans will always be
operating whenever AHU%1 is running.
AHU%2 (Trane MCCB021) provides the ventilation air for the gym and
make%up air for the kitchen. The fan is run by a 7.5 horse power motor
operating at 208 volts and three phase power. AHU%2 is interlocked with
EF%2, the kitchen exhaust hood. The minimum outside air setpoint for
AHU%2 is 3,200 CFM. AHU%2 is controlled by a manual timer located in
the gym or the kitchen and is interlocked to run when the kitchen hood
exhaust fan (EF%2) is operating. At the time of the site visit the timer
switch was not winding down properly and was stuck in the on%position.
This means that AHU%2 and EF%2 were running excessively and wasting
energy. This timer switch should be replaced.
It is also important to note that during the site visit the gym, kitchen and
dining room were at a temperature of 60 °F and were experiencing
simultaneous heating and cooling. AHU%2 was providing 55 °F air to the
spaces for cooling and the terminal units were running continuously to try
and heat the space. Discussions with teachers revealed that these
spaces were often cold. The reason for this is due to the location of the
dining room milk cooler next to the dining room thermostat. When the
cooler was operating, the heat rejected from the refrigeration cycle on the
back of the cooler was being recorded by the thermostat as the space
temperature and therefore the thermostat was calling for cooling of the
space. This milk cooler should be relocated to a different location so that
the thermostat will provide an accurate reading of the space temperature
and the heating and cooling systems can operate correctly. Simultaneous
heating and cooling is a waste of energy and creates a situation that is
usually uncomfortable for the occupants.
EF%1 (Greenheck SQ%130%b%B) provides a total of 930 CFM of exhaust air
for the restrooms and locker rooms. The fan is run by a ¼ HP motor
operating at 120 volts and single phase power. EF%1 is interlocked with
AHU%1. Based upon the controls, EF%1 is always operating whenever the
building is in occupied mode.
EF%2 (Greenheck Cube%180 HP%15) provides 2,700 CFM of exhaust air for
the kitchen hood. The fan is run by a 1%1/2 HP motor operating at 208
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volts and three phase power. EF%2 is interlocked with AHU%2, and thus
always running whenever AHU%2 is running.
EF%3 (Greenheck SQ%130%BA) provides 900 CFM of exhaust air for toilet
rooms 129, 130, 131, 136T & 137T. The fan is run by a ¼ HP motor
operating at 120 volts and single phase power. EF%3 is interlocked with
AHU%1. Based upon the controls, EF%3 is always operating whenever the
building is in occupied mode.
EF%4 (Greenheck SQ%90%D) provides 500 CFM of exhaust air for the
dishwasher hood in the kitchen. The fan is run by a 1/10 HP motor
operating at 120 volts and single phase power. EF%4 is controlled by a
solid state variable controller on the dishwasher and an on%off wall switch
in the kitchen.
EF%5 (Greenheck SP%6.5) provides 75 CFM of exhaust air for toilet rooms
102 & 106. The fan is run by a 50 Watt motor operating at 120 volts and
single phase power. EF%5 is controlled by a wall switch.
RF%1 (Cook 245SQN%B) provides 8,000 CFM of return air from the
classrooms for AHU%1. The fan is run by a ¼ HP motor operating at 120
volts and single phase power. RF%1 is interlocked with AHU%1. Based
upon the controls, RF%1 is always operating whenever the building is in
occupied mode.
CH (Chemical Hood) is located in Classroom 113. This fan and hood
provide exhaust for the classroom as required for the evacuation of fumes
and chemicals.
RH (Range Hood (Broan 88304)) is located in the consumer science
classroom. RH provides 360 CFM of exhaust air for each of the two
electric stoves in the classroom. The fan is run by a 4.5 Amp motor
operating at 120 volts and single phase. Both RH fans are controlled by a
switch located on the exhaust hood.
CF%1 (Leading Edge A%60) is a 60 inch fan that serves for destratification
of the air in the dining room. One fan is located in the dining room to keep
the air circulating and prevent the hot air from collecting at the ceiling level
and the cold air settling down at the occupied floor level. The fan is run by
a 1/3 horse power motor operating at 120 volts and single phase power.
The fan is controlled by a variable speed controller located in the dining
room.
CF%2 (Greenheck SS1%24%432%C4) is a fan that serves for destratification
of the air in the gym. Four fans are located in the gym to keep the air
circulating and prevent the hot air from collecting at the ceiling level and
13
the cold air settling down at the occupied floor level. The fan is run by a ¼
horse power motor operating at 120 volts and single phase power. The
fans are controlled by variable speed controllers located in the gym.
c. Plumbing System: The James C. Isabell School contains eight
bathrooms of varying size, two locker rooms with four showers each, one
janitor closet with a janitor sink, a shop storage with a utility sink, a kitchen
with one three compartment sink, two single compartment sinks and a
commercial dishwasher, a concession area with a sink, a consumer
science classroom with two double compartment sinks, seven classroom
sinks, and a general purpose room that contains a clothes washer and
dryer.
d. Domestic Hot Water: Hot water for the James C. Isabell School is
produced by three 120 gallon hot water generators (Amtrol Boilermate
WHS%120ZC%DW). One hot water generator is set to 160 °F for the
kitchen hot water, and the other two are set to 120°F for the rest of the hot
water in the school. The hot water generators have a continuous flow
rating of 242 gallons per hour at a temperature rise of 70 °F. The hot
water generators are the original equipment that were installed when the
building was constructed in 2004. The James C. Isabell School contains
three hot water circulation pumps (Grundfos UP 15%29SF) operating
continuously at 115 volts and single phase power to keep the hot water
available throughout the school.
The domestic hot water for the 4%plex teacher housing building is provided
by a 120 gallon hot water generator (Triangle Tube phase III Indirect fired
water heater). This hot water generator was installed at the time of the
conversion of the building into apartments in 2006. The 4%plex apartment
building contains one hot water circulation pump (Grundfos UP 15%29SF)
operating continuously at 115 volts and single phase power.
e. Lighting: Typical lighting throughout the building is comprised of T%8
fluorescent fixtures with electronic ballasts. The lighting in the gym is
comprised of twenty%nine 55W CFL fixtures. The school has fifty%one
emergency light wall packs (Lithonia model 6ELM2). Three different types
of lighting fixtures are used on the exterior of the building, all of which are
high pressure sodium (HPS) lights. Under the covered entryways five 50
watt HPS surface mounted fixtures are installed. For site lighting, sixteen
50 watt HPS surface wall packs are installed at various locations on the
exterior walls. Mounted on a utility pole is a single 250 watt HPS light
fixture. The school contains six LED exit signs.
14
5. 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.
The average electric consumption for the building is 220,449 kWh/year at an
average cost of $127,002 /year. The average fuel oil consumption is 26,021
gallons/year, at an average annual cost of $69,288 /year. This results in the total
average utility costs for the building of $196,290 /year.
6. Energy Efficiency Measures considered or recommended: The building was
examined for application of a multitude of potential EEMs. 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.
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.
7. 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.
15
8. Loan Program: The Alaska Housing Finance Corporation (AHFC) Alaska
Energy Efficiency Revolving Loan Fund (AEERLF) is a State of Alaska program
enacted by the Alaska Sustainable Energy Act (senate Bill 220, A.S. 18.56.855,
“Energy Efficiency Revolving Loan Fund). The AEERLF will provide loans for
energy efficiency retrofits to public facilities via the Retrofit Energy Assessment
for Loan System (REAL). As defined in 15 AAC 155.605, the program may
finance energy efficiency improvements to buildings owned by:
a. Regional educational attendance areas;
b. Municipal governments, including political subdivisions of municipal
governments;
c. The University of Alaska;
d. Political subdivisions of the State of Alaska, or
e. The State of Alaska
Native corporations, tribal entities, and subsidiaries of the federal government
are not eligible for loans under this program.
Appendix A
Appendix A: James C. Isabell School Pictures
Photo 1: School site aerial view, (looking Southwest).
Photo 2: Northwest elevation view.
Photo 3: Northwest elevation view.
Appendix A: James C. Isabell School Pictures
Photo 4: Southwest elevation view.
Photo 6: South elevation view of gym.
Photo 8: Northeast elevation view.
Photo 5: Southwest elevation view.
Photo 7: Southeast elevation view of
gym.
Photo 9: Northeast elevation plan.
Appendix A: James C. Isabell School Pictures
Photo 10: Mechanical building.
Photo 12: Washeteria building.
Photo 14: Typical classroom.
Photo 11: Teacher 4-Plex apartments,
(old elementary building).
Photo 13: Water plant.
Photo 15: Milk cooler next to thermostat
in dining room.
Appendix A: James C. Isabell School Pictures
Photo 16: Mechanical building boilers.
Photo 18: Mechanical building pump
serving teacher apartments.
Photo 17: Mechanical building pumps
serving school building, (CP-1A, 1B, 1C).
Photo 19: School back-up generator.
Appendix A: James C. Isabell School Pictures
Photo 20: Air compressor for school
pneumatic controls.
Photo 22: Water, sewer and heat-trace
from school to new teacher housing.
Photo 21: Automated controls for air
handlers.
Appendix B
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 1
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 3/7/2012 4:39 AM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Teller School Auditor Company: RSA Engineering, Inc.
Address: 100 Airport Ave Auditor Name: Nathan P. Zeigler
City: Teller Auditor Address: 2522 Arctic Blvd, Suite 200
Anchorage, AK 99503 Client Name: Susette Carroll
Client Address: James C. Isabell School
100 Airport Ave
Teller, AK 99778
Auditor Phone: (907) 276-0521
Auditor FAX: (907) 276-1751
Client Phone: (907) 642-3041 Auditor Comment:
Client FAX: (907) 642-3031
Design Data
Building Area: 21,370 square feet Design Heating Load: Design Loss at Space: 1,451,782
Btu/hour
with Distribution Losses: 1,528,192 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 2,329,561 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 207 people Design Indoor Temperature: 70 deg F (building average)
Actual City: Teller Design Outdoor Temperature: -27 deg F
Weather/Fuel City: Teller Heating Degree Days: 15,142 deg F-days
Utility Information
Electric Utility: Teller Power Company - Commercial - Lg Natural Gas Provider: None
Average Annual Cost/kWh: $0.563/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
$102,29
6
$0 $26,134 $35,450 $4,467 $22,46
6
$6,164 $632 $15,123 $0 $212,732
With
Proposed
Retrofits
$64,752 $0 $22,237 $24,481 $3,862 $22,46
6
$6,164 $632 $11,638 $0 $156,234
SAVINGS $37,544 $0 $3,896 $10,969 $604 $0 $0 $0 $3,485 $0 $56,498
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 2
$0
$50,000
$100,000
$150,000
$200,000
$250,000
Existing Retrofit
Ventilation and Fans
Space Heating
Refrigeration
Other Electrical
Lighting
Domestic Hot Water
Cooking
Clothes Drying
Annual Energy Costs by End Use
$0
$50,000
$100,000
$150,000
$200,000
$250,000
Existing Retrofit
#1 Oil Electricity
Annual Energy Costs by Fuel
$0 $20,000 $40,000 $60,000 $80,000
Floor
Wall/Door
Window
Ceiling
Air
Existing Retrofit
Annual Space Heating Cost by Component
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 3
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Ventilation Install CO2 sensor in the
return air stream of AHU-2
to reduce the outside air
requirements.
$20,698 $500 548.99 0
2 Setback Thermostat:
Gymnasium - 124
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gymnasium - 124
space.
$2,136 $200 144.89 0.1
3 Setback Thermostat:
Mechanical Building
- M100
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Mechanical Building -
M100 space.
$945 $200 64.12 0.2
4 Setback Thermostat:
Kindergarten
Classroom - 136
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kindergarten
Classroom - 136 space.
$855 $200 58.00 0.2
5 Setback Thermostat:
Science - 113
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Science - 113 space.
$740 $200 50.21 0.3
6 Refrigeration:
Classroom
Accessories
Add new Seasonal
Shutdown
$79 $10 48.10 0.1
7 Refrigeration: Staff
Room Refrigerator
Add new Seasonal
Shutdown
$79 $10 48.06 0.1
8 Refrigeration: School
Store Equipment
Add new Seasonal
Shutdown
$79 $10 48.09 0.1
9 Refrigeration: Home
Economics
Equipment
Add new Seasonal
Shutdown
$79 $10 48.08 0.1
10 Setback Thermostat:
Academic Classroom
- 107
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Academic Classroom -
107 space.
$688 $200 46.69 0.3
11 Setback Thermostat:
Library/AV Data -
108
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Library/AV Data - 108
space.
$586 $200 39.76 0.3
12 Refrigeration: Chest
Freezer
Add new Seasonal
Shutdown
$61 $10 36.84 0.2
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 4
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
13 Setback Thermostat:
Voc. Ed. Classroom -
116
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Voc. Ed. Classroom -
116 space.
$499 $200 33.86 0.4
14 Setback Thermostat:
Intermediate
Classroom - 139
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Intermediate
Classroom - 139 space.
$425 $200 28.80 0.5
15 Refrigeration:
Kitchen Equipment
Add new Seasonal
Shutdown
$47 $10 28.34 0.2
16 Setback Thermostat:
Academic Classroom
- 112
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Academic Classroom -
112 space.
$383 $200 25.95 0.5
17 Setback Thermostat:
Special Education -
133
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Special Education - 133
space.
$337 $200 22.84 0.6
18 Setback Thermostat:
Intermediate
Classroom - 138
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Intermediate
Classroom - 138 space.
$334 $200 22.63 0.6
19 Setback Thermostat:
Primary Classroom -
137
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Primary Classroom -
137 space.
$327 $200 22.18 0.6
20 Setback Thermostat:
Cust./Gen. Storage -
126
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Cust./Gen. Storage -
126 space.
$303 $200 20.57 0.7
21 Refrigeration:
Classroom
Accessories
Add new Seasonal
Shutdown
$33 $10 19.96 0.3
22 Setback Thermostat:
Girls - 132
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls - 132 space.
$266 $200 18.05 0.8
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 5
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
23 Setback Thermostat:
Staff - 104
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Staff - 104 space.
$239 $200 16.24 0.8
24 Setback Thermostat:
Consumer Science
Lab - 117
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Consumer Science Lab
- 117 space.
$231 $200 15.68 0.9
25 Setback Thermostat:
Girls Lockers - 120L
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls Lockers - 120L
space.
$226 $200 15.35 0.9
26 Setback Thermostat:
Receptionist - 144
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Receptionist - 144
space.
$218 $200 14.79 0.9
27 Setback Thermostat:
Principal - 142
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Principal - 142 space.
$186 $200 12.59 1.1
28 Setback Thermostat:
SFA - 105
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the SFA - 105 space.
$184 $200 12.46 1.1
29 Setback Thermostat:
Gym Storage - 125
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gym Storage - 125
space.
$167 $200 11.35 1.2
30 Setback Thermostat:
Counselor - 143
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Counselor - 143 space.
$145 $200 9.87 1.4
31 Setback Thermostat:
Cultural Commons -
101
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Cultural Commons -
101 space.
$141 $200 9.58 1.4
32 Setback Thermostat:
Skis - 134
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Skis - 134 space.
$135 $200 9.16 1.5
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 6
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
33 Setback Thermostat:
Shop Storage 115
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Shop Storage 115
space.
$133 $200 9.04 1.5
34 Setback Thermostat:
Skis - 118
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Skis - 118 space.
$128 $200 8.69 1.6
35 Lighting: Type J -
Lithonia
FSM225CF55PCLWG
S1X12120LP841
Add new Occupancy
Sensor
$939 $1,000 5.66 1.1
36 Setback Thermostat:
Main Entry - 100
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Main Entry - 100
space.
$77 $200 5.21 2.6
37 Setback Thermostat:
Vestibule - 124V
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Vestibule - 124V space.
$59 $200 3.97 3.4
38 Setback Thermostat:
Toilet - 102
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Toilet - 102 space.
$54 $200 3.66 3.7
39 Exterior Door:
Exterior Doors (10)
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$932 $6,057 3.65 6.5
40 Lighting: Type T -
Lithonia KAD-250S-
R3-120-WWD09-SF-
DDB
Replace with 4 LED 100W
Module StdElectronic
$2,570 $5,333 2.98 2.1
41 Lighting: Type N -
Lithonia VR4C-50S-
120-SF-LPI
Replace with 5 LED 20W
Module StdElectronic
$1,136 $2,500 2.81 2.2
42 Setback Thermostat:
Girls - 120
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls - 120 space.
$37 $200 2.50 5.4
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 7
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
43 HVAC And DHW Provide VFD controls for
hydronic circulators; Install
timers and and implement
schedule for HWC pumps
(HWCP-1 & HWCP-2) to
operate during the hours
of 6am to 10 pm only;
Replace existing lavatory
faucets with infra-red
automatic faucets; Replace
existing shower heads with
ultra-low flow shower
heads.
$12,882 $68,864 2.45 5.3
44 Setback Thermostat:
Corridor - 119
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor - 119 space.
$26 $200 1.72 7.8
45 Lighting: Type S -
Lithonia 2PM3X-332-
18LD-120-GEB10
Add new Occupancy
Sensor
$128 $500 1.53 3.9
46 Lighting: Type M -
Lithonia TWAC-50S-
120-SF-LPI
Replace with 17 LED 20W
Module StdElectronic
$1,932 $8,500 1.41 4.4
47 Setback Thermostat:
Corridor - 135
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor - 135 space.
$20 $200 1.31 10.3
48 Lighting: Type Q -
Lithonia 2M-332-
A12-125-120-GEB10
Add new Occupancy
Sensor
$239 $1,250 1.15 5.2
49 Lighting: Type B -
Lithonia 2SP-GB-332-
A12125-120-GEB10
Add new Occupancy
Sensor and Improve Multi-
Level Switch
$320 $2,000 0.96 6.3
50 Lighting: Type H -
Lithonia VDS-232-
120-GEB10-WL
Add new Occupancy
Sensor
$275 $1,750 0.94 6.4
51 Lighting: Type R -
Holophane
BL2E250MH-MT-E-5-
F1
Replace with 3 FLUOR CFL,
Reflector 26W PAR38
$393 $3,000 0.79 7.6
52 Window/Skylight:
Window Type B (22)
not South facing
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$503 $12,159 0.72 24.2
53 Lighting: Type I8 -
Lithonia TC-432-120-
GEB10-WG
Add new Occupancy
Sensor
$298 $2,500 0.72 8.4
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 8
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
54 Window/Skylight:
Window Type E (1)
South facing
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$35 $884 0.68 25.3
55 Lighting: Type P8 -
Ledalite 221-8-T02-S-
N-08-2-1-E-W
Add new Occupancy
Sensor
$170 $1,500 0.68 8.8
56 Window/Skylight:
WIndow Type B (12)
South facing
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$251 $6,632 0.66 26.4
57 Window/Skylight:
Windows Type A (7)
all south facing
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$88 $2,321 0.66 26.4
58 Window/Skylight:
Window Type C (3)
all South facing
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$38 $995 0.66 26.4
59 Lighting: Type A -
Lithonia 2PM3-GB-
332-18LD-120-
GEB10
Add new Occupancy
Sensor
$772 $8,500 0.55 11
60 Window/Skylight:
Window Type D (4)
not South faciing
Replace existing window
with triple pane, 2 low-E,
argon window.
$110 $4,686 0.41 42.6
61 Lighting: Type E -
Lithonia AFZ-
2/26DTT-84A-120-
GEB10
Add new Occupancy
Sensor
$67 $1,000 0.40 14.9
62 Lighting: Type F3 -
Lithonia S-125-120-
GEB10 (2'
FLORESCENT)
Add new Occupancy
Sensor
$19 $500 0.23 26
63 Lighting: Type F2 -
Lithonia S-120-120-
GEB10 (2'
FLORESCENT)
Add new Occupancy
Sensor
$6 $250 0.15 40.6
64 Lighting: Type P4 -
Ledalite 221-8-T02-S-
N-04-2-1-E-W
Add new Occupancy
Sensor
$8 $500 0.10 62.7
65 Lighting: Type R -
Holophane
BL2E250MH-MT-E-5-
F1
Add new Occupancy
Sensor
$4 $750 0.03 186.8
66 Setback Thermostat:
Corridor 103
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor 103 space.
$0 $200 0.00 Infinity
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 9
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
67 Setback Thermostat:
Toilet - 106
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Toilet - 106 space.
$0 $200 0.00 Infinity
68 Setback Thermostat:
Server - 109
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Server - 109 space.
$0 $200 0.00 Infinity
69 Setback Thermostat:
Storage - 110
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage - 110 space.
$0 $200 0.00 Infinity
70 Setback Thermostat:
Storage 111
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage 111 space.
$0 $200 0.00 Infinity
71 Setback Thermostat:
Store - 114
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Store - 114 space.
$0 $200 0.00 Infinity
72 Setback Thermostat:
Boys - 121
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys - 121 space.
$0 $200 0.00 Infinity
73 Setback Thermostat:
Boys Lockers - 121L
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys Lockers - 121L
space.
$0 $200 0.00 Infinity
74 Setback Thermostat:
Stair - 122
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Stair - 122 space.
$0 $200 0.00 Infinity
75 Setback Thermostat:
Janitor - 123
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Janitor - 123 space.
$0 $200 0.00 Infinity
76 Setback Thermostat:
Dry Storage - 127
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Dry Storage - 127
space.
$0 $200 0.00 Infinity
77 Setback Thermostat:
Kitchen - 128
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kitchen - 128 space.
$0 $200 0.00 Infinity
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 10
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
78 Setback Thermostat:
Dining - 129
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Dining - 129 space.
$0 $200 0.00 Infinity
79 Setback Thermostat:
Boys - 130
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys - 130 space.
$0 $200 0.00 Infinity
80 Setback Thermostat:
Storage - 131
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage - 131 space.
$0 $200 0.00 Infinity
81 Setback Thermostat:
Kindergarten Toilet -
136T
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kindergarten Toilet -
136T space.
$0 $200 0.00 Infinity
82 Setback Thermostat:
Primary Toilet - 137T
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Primary Toilet - 137T
space.
$0 $200 0.00 Infinity
83 Setback Thermostat:
Conference - 140
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Conference - 140
space.
$0 $200 0.00 Infinity
84 Setback Thermostat:
Storage 141
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage 141 space.
$0 $200 0.00 Infinity
85 Setback Thermostat:
Fan Room - 200
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Fan Room - 200 space.
$0 $200 0.00 Infinity
TOTAL $56,498 $154,902 4.49 2.7
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
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 11
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
39 Exterior Door:
Exterior Doors (10)
Door Type: Entrance, Metal,
honeycomb core; no glass
Modeled R-Value: 1.8
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$6,057 $932
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
52 Window/Skylight:
Window Type B
(22) not South
facing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$12,159 $503
54 Window/Skylight:
Window Type E (1)
South facing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$884 $35
56 Window/Skylight:
WIndow Type B
(12) South facing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$6,632 $251
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 12
57 Window/Skylight:
Windows Type A
(7) all south facing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$2,321 $88
58 Window/Skylight:
Window Type C (3)
all South facing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Remove existing glass and
replace with triple pane, 2
low-E, argon glass.
$995 $38
60 Window/Skylight:
Window Type D (4)
not South faciing
Glass: Triple, 1 Low-E Coating
Frame: Aluminum w/ Thermal
Break
Spacing Between Layers: Half
Inch
Gas Fill Type: Argon
Modeled U-Value: 0.41
Solar Heat Gain Coefficient
including Window Coverings:
0.39
Replace existing window
with triple pane, 2 low-E,
argon window.
$4,686 $110
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
43 Provide VFD controls for hydronic circulators; Install timers and and implement
schedule for HWC pumps (HWCP-1 & HWCP-2) to operate during the hours of 6am
to 10 pm only; Replace existing lavatory faucets with infra-red automatic faucets;
Replace existing shower heads with ultra-low flow shower heads.
$68,864 $12,882
Setback Thermostat
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 13
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
2 Gymnasium - 124 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gymnasium - 124
space.
$200 $2,136
3 Mechanical
Building - M100
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Mechanical Building -
M100 space.
$200 $945
4 Kindergarten
Classroom - 136
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kindergarten
Classroom - 136 space.
$200 $855
5 Science - 113 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Science - 113 space.
$200 $740
10 Academic
Classroom - 107
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Academic Classroom -
107 space.
$200 $688
11 Library/AV Data -
108
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Library/AV Data - 108
space.
$200 $586
13 Voc. Ed. Classroom
- 116
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Voc. Ed. Classroom -
116 space.
$200 $499
14 Intermediate
Classroom - 139
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Intermediate
Classroom - 139 space.
$200 $425
16 Academic
Classroom - 112
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Academic Classroom -
112 space.
$200 $383
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 14
17 Special Education -
133
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Special Education - 133
space.
$200 $337
18 Intermediate
Classroom - 138
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Intermediate
Classroom - 138 space.
$200 $334
19 Primary Classroom
- 137
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Primary Classroom -
137 space.
$200 $327
20 Cust./Gen. Storage
- 126
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Cust./Gen. Storage -
126 space.
$200 $303
22 Girls - 132 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls - 132 space.
$200 $266
23 Staff - 104 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Staff - 104 space.
$200 $239
24 Consumer Science
Lab - 117
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Consumer Science Lab -
117 space.
$200 $231
25 Girls Lockers - 120L Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls Lockers - 120L
space.
$200 $226
26 Receptionist - 144 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Receptionist - 144
space.
$200 $218
27 Principal - 142 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Principal - 142 space.
$200 $186
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 15
28 SFA - 105 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the SFA - 105 space.
$200 $184
29 Gym Storage - 125 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gym Storage - 125
space.
$200 $167
30 Counselor - 143 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Counselor - 143 space.
$200 $145
31 Cultural Commons
- 101
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Cultural Commons -
101 space.
$200 $141
32 Skis - 134 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Skis - 134 space.
$200 $135
33 Shop Storage 115 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Shop Storage 115
space.
$200 $133
34 Skis - 118 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Skis - 118 space.
$200 $128
36 Main Entry - 100 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Main Entry - 100 space.
$200 $77
37 Vestibule - 124V Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Vestibule - 124V space.
$200 $59
38 Toilet - 102 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Toilet - 102 space.
$200 $54
42 Girls - 120 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Girls - 120 space.
$200 $37
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 16
44 Corridor - 119 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor - 119 space.
$200 $26
47 Corridor - 135 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor - 135 space.
$200 $20
66 Corridor 103 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Corridor 103 space.
$200 $0
67 Toilet - 106 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Toilet - 106 space.
$200 $0
68 Server - 109 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Server - 109 space.
$200 $0
69 Storage - 110 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage - 110 space.
$200 $0
70 Storage 111 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage 111 space.
$200 $0
71 Store - 114 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Store - 114 space.
$200 $0
72 Boys - 121 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys - 121 space.
$200 $0
73 Boys Lockers - 121L Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys Lockers - 121L
space.
$200 $0
74 Stair - 122 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Stair - 122 space.
$200 $0
75 Janitor - 123 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Janitor - 123 space.
$200 $0
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 17
76 Dry Storage - 127 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Dry Storage - 127
space.
$200 $0
77 Kitchen - 128 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kitchen - 128 space.
$200 $0
78 Dining - 129 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Dining - 129 space.
$200 $0
79 Boys - 130 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Boys - 130 space.
$200 $0
80 Storage - 131 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage - 131 space.
$200 $0
81 Kindergarten Toilet
- 136T
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Kindergarten Toilet -
136T space.
$200 $0
82 Primary Toilet -
137T
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Primary Toilet - 137T
space.
$200 $0
83 Conference - 140 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Conference - 140
space.
$200 $0
84 Storage 141 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Storage 141 space.
$200 $0
85 Fan Room - 200 Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Fan Room - 200 space.
$200 $0
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 18
1 Install CO2 sensor in the return air stream of AHU-2 to reduce the outside air
requirements.
$500 $20,698
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
35 Type J - Lithonia
FSM225CF55PCLW
GS1X12120LP841
30 FLUOR (5) CFL, Reflector
55W with Manual Switching,
Multi-Level Switch
Add new Occupancy Sensor $1,000 $939
40 Type T - Lithonia
KAD-250S-R3-120-
WWD09-SF-DDB
4 HPS 250 Watt Magnetic with
Manual Switching
Replace with 4 LED 100W
Module StdElectronic
$5,333 $2,570
41 Type N - Lithonia
VR4C-50S-120-SF-
LPI
5 HPS 50 Watt Magnetic Replace with 5 LED 20W
Module StdElectronic
$2,500 $1,136
45 Type S - Lithonia
2PM3X-332-18LD-
120-GEB10
16 FLUOR (3) T8 4' F32T8 32W
Standard (2) Instant
StdElectronic with Manual
Switching, Multi-Level Switch
Add new Occupancy Sensor $500 $128
46 Type M - Lithonia
TWAC-50S-120-SF-
LPI
17 HPS 50 Watt Magnetic with
Manual Switching
Replace with 17 LED 20W
Module StdElectronic
$8,500 $1,932
48 Type Q - Lithonia
2M-332-A12-125-
120-GEB10
24 FLUOR (3) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $1,250 $239
49 Type B - Lithonia
2SP-GB-332-
A12125-120-GEB10
23 FLUOR (3) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching, Multi-
Level Switch
Add new Occupancy Sensor
and Improve Multi-Level
Switch
$2,000 $320
50 Type H - Lithonia
VDS-232-120-
GEB10-WL
26 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $1,750 $275
51 Type R - Holophane
BL2E250MH-MT-E-
5-F1
3 MH 250 Watt StdElectronic
with Manual Switching
Replace with 3 FLUOR CFL,
Reflector 26W PAR38
$3,000 $393
53 Type I8 - Lithonia
TC-432-120-GEB10-
WG
19 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $2,500 $298
55 Type P8 - Ledalite
221-8-T02-S-N-08-
2-1-E-W
13 FLUOR (4) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $1,500 $170
59 Type A - Lithonia
2PM3-GB-332-
18LD-120-GEB10
127 FLUOR (3) T8 4' F32T8 32W
Standard (2) Instant
StdElectronic with Manual
Switching, Multi-Level Switch
Add new Occupancy Sensor $8,500 $772
61 Type E - Lithonia
AFZ-2/26DTT-84A-
120-GEB10
9 FLUOR (2) CFL, Plug-in 26W
Quad Tube StdElectronic with
Manual Switching
Add new Occupancy Sensor $1,000 $67
Energy Audit – Energy Analysis and Cost Comparison
AkWarm Commercial Audit Software
Teller School
Page 19
62 Type F3 - Lithonia
S-125-120-GEB10
(2' FLORESCENT)
5 FLUOR (1) T8 3' F25T8 25W
Standard (1) Instant
StdElectronic with Manual
Switching
Add new Occupancy Sensor $500 $19
63 Type F2 - Lithonia
S-120-120-GEB10
(2' FLORESCENT)
2 FLUOR (1) T8 2' F20T8 20W
Standard (1) Instant
StdElectronic with Manual
Switching
Add new Occupancy Sensor $250 $6
64 Type P4 - Ledalite
221-8-T02-S-N-04-
2-1-E-W
3 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Add new Occupancy Sensor $500 $8
65 Type R - Holophane
BL2E250MH-MT-E-
5-F1
3 MH 250 Watt StdElectronic
with Manual Switching
Add new Occupancy Sensor $750 $4
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
6 Classroom
Accessories
Refrigerator Add new Seasonal
Shutdown
$10 $79
7 Staff Room
Refrigerator
Refrigerator Add new Seasonal
Shutdown
$10 $79
8 School Store
Equipment
Refrigerator Add new Seasonal
Shutdown
$10 $79
9 Home Economics
Equipment
Refrigerator Add new Seasonal
Shutdown
$10 $79
12 Chest Freezer Freezer Add new Seasonal
Shutdown
$10 $61
15 Kitchen Equipment Refrigerator - Milk Cooler Add new Seasonal
Shutdown
$10 $47
21 Classroom
Accessories
Refrigerator - Half Size Add new Seasonal
Shutdown
$10 $33
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
------------------------------------------
AkWarmCalc Ver 2.1.4.2, Energy Lib 3/1/2012
Appendix C