HomeMy WebLinkAboutCIRI-ANC-CAEC Bayshore Elementary School 2012-EEENERGY AUDIT FINAL REPORT
Bayshore Elementary School
10500 Bayshore Dr.
Anchorage, AK 99517
p (907) 742-5360
AkWarm ID No. CIRI-ANC-CAEC-08
800 F Street
Anchorage, AK 99501
p (907) 276-6664 f (907) 276-5042
Contact: Walter Heins, PE, CCP, CxA, CEA
32215 Lakefront Dr.
Soldotna, Alaska 99669
p (907) 260-5311
Contact: Jerry P. Herring, PE, CEA
Bayshore Elementary Final Energy Audit Report
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Contents
I. Executive Summary .................................................................................................................. 1
II. Introduction .............................................................................................................................. 5
III. Energy Audit Process ............................................................................................................. 6
IV. Method of Analysis ................................................................................................................. 7
V. Building Description ................................................................................................................ 8
V.I SCHOOL ARCHITECTURAL DESCRIPTION .............................................................................................................. 9
V.II MECHANICAL DESCRIPTION ............................................................................................................................... 9
V.III ELECTRICAL DESCRIPTION .............................................................................................................................. 10
V.IV PORTABLE BUILDINGS DESCRIPTION .............................................................................................................. 11
VI. Historic Energy Consumption and Cost............................................................................. 12
VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 12
VI.II NATURAL GAS CONSUMPTION DATA .............................................................................................................. 12
VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 12
VII. Equipment Inventory and Photo Survey .......................................................................... 14
VIII. Energy Conservation Measures ....................................................................................... 15
VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 15
VIII.II PORTABLE BUILDINGS ENERGY CONSERVATION MEASURES ....................................................................... 19
VIII.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ....................................... 21
Appendices
Appendix A – Energy Benchmark Data
Appendix B – AkWarm Commercial Reports
Appendix C – Major Equipment List
Appendix D – Energy Conservation Measures – Bayshore Elementary School
Appendix E – Energy Conservation Measures – Portable Buildings
Appendix F – Site Survey Photos
Appendix G – Thermographic Photos
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Abbreviations
AHFC Alaska Housing & Finance Corporation
ARRA American Recovery & Reinvestment Act
ASD Anchorage School District
ASHRAE American Society of Heating, Refrigeration, and Air-Conditioning Engineers
BTU British Thermal Unit
CCF One Hundred Cubic Feet
CFM Cubic Feet per Minute
CMU Concrete Masonry Unit
DDC Direct Digital Control
ECI Energy Cost Index
ECM Energy Conservation Measure
EPDM Ethylene Propylene Diene Monomer
EUI Energy Utilization Index
F Fahrenheit
HP horsepower
HPS High Pressure Sodium
HVAC Heating, Ventilating, and Air-Conditioning
in inch(es)
IPLC Integrated Power & Load Circuit
kWh kilowatt-hour
LED Light-Emitting Diode
O&M Operations & Maintenance
sf square feet
SIR Savings-to-Investment Ratio
V Volts
W Watts
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List of Figures
Fig. 1 - Energy Audit Clients ........................................................................................................................ 1
Fig. 2 - Energy Benchmark Data .................................................................................................................. 1
Fig. 3 - Bayshore Elementary School Location in Anchorage, Alaska – Google Maps ............................... 5
Fig. 4 - Bayshore Elementary School – Google Maps .................................................................................. 5
Fig. 5 - Bayshore Elementary Floor Plan ...................................................................................................... 8
List of Tables
Table 1 - Recommended Energy Conservation Measures, Bayshore Elementary School ............................ 2
Table 2 - Recommended Energy Conservation Measures, Portable Buildings ............................................ 4
Table 3 - Building History, Bayshore Elementary School ............................................................................ 8
Table 4 - Energy Cost and Consumption Data ........................................................................................... 12
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REPORT DISCLAIMER
Privacy
The information contained within this report, including any attachment(s), was produced under contract to Alaska
Housing Finance Corporation (AHFC). IGAs are the property of the State of Alaska, and may be incorporated into
AkWarm-C, the Alaska Retrofit Information System (ARIS), or other state and/or public information systems.
AkWarm-C is a building energy modeling software developed under contract by AHFC.
Limitations of Study
This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the
savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a
Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning
Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA
may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted
with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of
input data provided. Not all data could be verified and no destructive testing or investigations were undertaken.
Some data may have been incomplete.
This report is not intended to be a final design document. Any modifications or changes made to a building to realize
the savings must be designed and implemented by licensed, experienced professionals in their fields. Lighting
upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska
Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including
but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design.
Coffman Engineers, Inc (CEI) and Central Alaska Engineering Company (CAEC) bear no responsibility for work
performed as a result of this report.
Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration,
equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided
by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the
performance of another ECM. CEI and CAEC accept no liability for financial loss due to ECMs that fail to meet the
forecasted financial ratios.
The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings.
Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting
quality. The new generation lighting systems have significantly longer life leading to long term labor savings,
especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any
fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-7
years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the
performance of students and workers in the built environment. New lighting systems can be designed to address all
of the above benefits.
US Government Disclaimer
This material is based upon work supported by the Department of Energy under Award Number DE-EE0000095.
This report was prepared as an account of work sponsored by an agency of the United States Government. Neither
the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or
implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any
information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned
rights. Reference herein to any specific commercial product, process, or service by trade name, trademark,
manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring
by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not
necessarily state or reflect those of the United States Government or any agency thereof.
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I. Executive Summary
This report presents the findings of an energy audit conducted at Bayshore Elementary School as part of a
contract for:
Alaska Housing Finance Corporation
Contact: Rebekah Luhrs
4300 Boniface Parkway
Anchorage, AK 99510
Email: rluhrs@ahfc.us
Anchorage School District
Contact: Calvin Mundt
1301 Labar Street
Anchorage, AK 99515-3517
Email: mundt_calvin@asdk12.org
Fig. 1 - Energy Audit Clients
This audit was performed using American Recovery and Reinvestment Act (ARRA) funds to promote the
use of innovation and technology to solve energy and environmental problems in a way that improves the
State of Alaska’s economy. This can be achieved through the wiser and more efficient use of energy.
The average January 2009-December 2010 documented annual utility costs at this facility are as follows:
Electricity $ 67,910
Natural Gas $ 59,660
Total $127,570
2009-2010 Average Energy Utilization Index (EUI) = 128.1 kBtu/sf
2009-2010 Average Energy Cost Index = 1.98 $/sf
Fig. 2 - Energy Benchmark Data
Energy Conservation Measures (ECMs) calculated to be cost effective are shown below in the Executive
Summary Table with the energy analyst’s best opinion of probable cost, savings, and investment returns.
Be aware that the measures are not additive because of the interrelation of several of the measures. The
cost of each measure for this level of auditing is ± 30% until detailed engineering, specifications, and hard
proposals are obtained. See section VIII for detailed descriptions of all cost effective ECMs.
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Table 1 - Recommended Energy Conservation Measures, Bayshore Elementary School
Executive Summary – Recommended ECMs
Bayshore Elementary School (BES)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
BES-1a Refrigerators Replace residential & light
commercial
refrigerators/freezers older
than 5 years old
-- - <10
BES-2 Setback
Thermostat
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the School
$4,998 $2,000 32.26 0.4
BES-3 Lighting:
Student
Restroom
Upgrade Restroom
Lighting
$41 $180 3.34 4.4
BES-4 Lighting:
Corridor
Upgrade Corridor and
Cafeteria Lighting
$591 $3,000 2.74 5.1
BES-5 Lighting:
Classrooms
Library and
Music
Upgrade Library,
Classroom and Pod Area
Lighting
$539 $2,900 2.66 5.4
BES-6 Lighting:
Utility
Upgrade Utility Room
Lighting
$4 $30 2.11 6.9
BES-7 PMP-10 Replace with New EC
Motor at the time of next
required motor
replacement.
$254 $1,200 1.75 4.7
BES-8 Lighting:
Office
Upgrade Office Space
Lighting Controls
$84 $750 1.58 8.9
BES-9 HVAC And
DHW
Replace Boiler B-2 with
New High Efficiency
Boiler
$9,696 $160,000 1.41 16.5
BES-10 Lighting:
Exterior
Upgrade Building Mounted
Exterior Lighting
$1,336 $15,600 1.25 11.7
BES-11 S-4, S-5, S-6
and S-7 Fan
Motors
Replace with 4 New
NEMA Premium Motors
(3 HP)
$191 $1,320 1.20 6.9
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Executive Summary – Recommended ECMs
Bayshore Elementary School (BES)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
BES-12 Air
Tightening
Perform air sealing to
reduce air leakage by 20%.
$1,449 $12,800 1.00 8.8
Notes:
a Due to advances in refrigerators in the previous 5 years, new Energy Star refrigerators are much more efficient and
result in viable energy savings.
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Table 2 - Recommended Energy Conservation Measures, Portable Buildings
Executive Summary – Recommended Energy Conservation Measures (ECMs)
Four Portable Buildings (PB)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
PB-1a Setback
Thermostat:
Four
Portable
Buildings
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Four Portable
Buildings space.
$2,650 $8,000 3.89 3
PB-2a Exterior
Door:
Portable
Building -
Doors
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$424 $4,920 1.65 11.6
PB-3a Lighting:
Portable
Lighting
Replace all T12 light
fixtures with T8 fixtures
one-for-one and install new
occupancy sensors.
Replace the exterior High
Pressure Sodium fixtures
with LED fixtures
$1,269 $12,400 1.49 9.8
PB-4a Air
Tightening
Perform air sealing to
reduce air leakage by 30%.
$1,182 $8,000 1.24 6.8
Note:
a ECM costs and savings are for all four portable buildings combined.
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II. Introduction
This energy audit was conducted at Bayshore Elementary School for AHFC and the Anchorage School
District. The school is a 64,458 square foot (sf) campus that includes a 60,618 sf school and four on-site
portables, with a combined area of 3,840 sf. The school consists of classrooms, restrooms, administrative
offices, a library, a gymnasium, and a multipurpose room (MPR). The location of the school is shown in
the following regional and overhead images. The energy audit was conducted in order to evaluate areas
and equipment where energy savings can be realized. The savings are then compared to a baseline and
evaluated for reasonable project financial ratios and payback.
Fig. 3 - Bayshore Elementary School Location in Anchorage, Alaska – Google Maps
Fig. 4 - Bayshore Elementary School – Google Maps
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III. Energy Audit Process
Prior to visiting the school, the first task was to collect and review two years of utility data for electricity
and natural gas usage. This information was used to analyze operational characteristics, calculate energy
benchmarks for comparison to industry averages, estimate savings potential and establish a baseline to
monitor the effectiveness of implemented energy conservation measures. A spreadsheet was used to enter,
sum, and calculate benchmarks and to graph energy use information (see Appendix A). The primary
benchmark calculation used for comparison and baseline data is the Energy Utilization Index, or EUI (see
Section VI).
After gathering the utility data and calculating the EUI, the next step in the audit process was to review
the architectural and engineering drawings to develop a building profile which documented building age,
type, usage, and major energy consuming equipment or systems such as lighting, Heating, Ventilating,
water heating, refrigeration, snow-melt, and etc. The building profile is utilized to generate, and answer,
all possible questions regarding the facility’s energy usage. These questions were then compared to the
energy usage profiles developed during the utility data gathering step. After this information was
gathered, the next step in the process was to conduct a site survey.
A site survey was completed on February 8, 2012. The audit included inspecting the building systems that
impact energy consumption and answering questions from the preliminary review of the school. The on-
site contact during the investigation was Mr. Bob Halpin of the ASD Maintenance Department1. The
following information was also collected while on site: occupancy schedules, O&M practices, building
energy management program, and other information that has an impact on energy consumption.
The following energy audit includes an evaluation of the information gathered, the researching of possible
conservation opportunities, organizing the energy audit into a comprehensive report, and making ECM
recommendations for mechanical, electrical, and building envelope improvements.
1 Mr. Bob Halpin, (907) 348-5212 (office), (907) 632-2884 (mobile)
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IV. Method of Analysis
Having completed the preliminary energy audit tasks, Coffman Engineers, Inc., (CEI) conducted a site
survey. The site survey provides critical input in deciphering where energy savings opportunities exist
within a facility. The audit team from CEI walked the entire site to inventory and investigate the building
envelope and major equipment, including: HVAC, water heating, lighting, and equipment located in
kitchens, offices, and classrooms. An understanding of how the equipment is used is determined during
the site survey.
The collected data was entered into AkWarm Commercial™ software, an energy calculating program for
buildings. The data was processed by AkWarm to model a baseline from which ECMs could be
considered. The model was compared to actual utility costs to ensure the quality of the baseline and
proposed energy modeling performed by AkWarm. The recommended ECMs focus on the building
envelope, HVAC, lighting, water heating, and other electrical measures that will reduce annual energy
consumption.
ECMs are evaluated based on building use and processes, local climate conditions, building construction
type, function, operational schedule, existing conditions, and foreseen future plans. When new equipment
is proposed, energy consumption is calculated based on the manufacturer’s cataloged information. Energy
savings are calculated by AkWarm.
Implementation of more than one ECM often affects the savings of other ECMs. The savings may in
some cases be relatively higher for an ECM implemented individually than when that ECM is just one of
multiple recommended ECMs. For example, implementing reduced operating schedules of inefficient
lighting systems may result in a given savings. Also implementing a more efficient lighting system will
add to the savings, but less than the efficient lighting would alone because there is less energy to be saved
when the lights are on a reduced operating schedule. Thus, if multiple ECM’s are recommended, the
combined savings are calculated and identified appropriately in groups.
In Appendix D, Energy Conservation Measures, the simple lifetime calculation is shown for each ECM,
which is based on the typical life of the equipment being replaced or altered. The energy savings are
extrapolated throughout the simple lifetime of the ECM. The total energy savings is calculated as the total
lifetime multiplied by the yearly energy savings.
The cost savings and installation costs are used to calculate simple payback2 and the Savings to
Investment Ratio3 (SIR). These are listed in Appendix D and summarized in the Executive Summary
Table of this report. The SIR is calculated as a ratio by dividing the break even cost by the initial installed
cost. Cost savings is calculated based on the historical energy costs for the building. Installation costs
include labor and equipment to evaluate the initial investment required to implement an ECM. These are
applied to each recommendation with simple paybacks calculated. The energy analyst’s opinions of
probable cost are garnered from RS Means Cost Data, other industry publications, and local contractors
and suppliers. In addition, where applicable, maintenance cost savings are estimated and applied to the net
savings.
2 The simple payback is based on the years that it takes for the net savings to payback the net installation cost (Cost
divided by Savings).
3 Savings to Investment Ratio (SIR): Break Even Cost divided by initial installed cost, where Break-Even Cost is
how much can be spent and still have the measure be cost effective; it equals the Present Value (PV) of Savings over
the life of the measure minus PV of maintenance costs.
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V. Building Description
Bayshore Elementary School is a large elementary school that was originally built in 1974. The school is
made up of four different pods, each pod containing a group of classrooms.
Fig. 5 - Bayshore Elementary Floor Plan
The school has had one major addition and several upgrades throughout its history. A brief list of the
major projects and years completed are shown below. The most recent heating and ventilation system
upgrade occurred in 2003.
Table 3 - Building History, Bayshore Elementary School
Bayshore Elementary School – Building History*
Date Addition or Renovation
1974 Original Construction
1975 Controls Upgrade for Mechanical Rooms
1989 Addition of Gym, Music Room, and North Wing Classrooms (7‐12)
1999 Electrical System Upgrade for Computer Room
2000 Boiler Room Upgrade
2003 Heating and Ventilation Upgrade
2005 Lighting and Sprinkler Upgrade
*History is based on available drawings from ASD.
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Bayshore Elementary is operated from 7 a.m. until 7 p.m., five days a week during the school year and is
open on weekends for school sports and community activities. After school activities include YMCA and
Boy Scouts, among others. The school year runs from late August through late May. During the summer
the school is not used and is typically shut down. There are approximately 540 students and 70 staff that
occupy Bayshore Elementary.
V.I School Architectural Description
The walls of the original school are a combination of 8” and 12” concrete masonry unit (CMU) block
walls, both with 2” of rigid insulation (estimated to be expanded polystyrene) on the inside face (R-9.6).
The upper 3.5’ of the original walls are a different wall type, with 2x4 stud walls with fiberglass batt
insulation. Thermal photos of these upper walls confirm that significant heat loss is occurring here. It is
estimated that these upper walls are R-4.8. The gym and north classroom addition were constructed
during the 1989 school addition. The gym walls are constructed with 12” CMU block with 3.5” of rigid
insulation, a ½” air space and 4” CMU block on the inside. The composite R-value of this wall is R-15.5.
The north wing classroom addition walls are 8” CMU block with 3.5” metal studs at 16” on-center on the
with fiberglass batt insulation in between the studs. The composite R-value of this wall is R-11.3. There
is approximately 47,598 sf of exterior wall area in the school.
The floors of the original school are un-insulated concrete slab on grade floors, except for the 2’ wide
outer perimeter of the floor which has 2” of horizontal rigid insulation below it. The foundation walls of
the original school also have 2” rigid insulation that extends vertically 2’ below grade along the
foundation wall. The slab edge on these original floors is not covered by the perimeter foundation
insulation. The floors of the east classroom addition and the gym are constructed with un-insulated
concrete slab on grade. Both of these floors have 3.5” rigid perimeter insulation that extends 2’ below
grade along the foundation wall. The perimeter insulation covers the slab edge. There is 50,917 sf of slab
on grade floor area and a total floor area of 60,618 sf. The slab on grade floor area is less than the usable
floor area of the building due to the school’s second story.
The roof of the original school is a built-up hot roof with 3” of rigid insulation and covered with concrete
pavers (R-14.6). The roof of the 1989 gym and classroom addition is a built up hot roof with 4” of rigid
insulation (R-18.4). Both of these roofs are under-insulated compared to the R-38 code requirement of
the 2006 Local Amendment to the International Energy Conservation Code, adopted by the Municipality
of Anchorage. There is a total of 50,917 sf of roof area.
There are three window types at the school: original wood frame windows, newer wood frame windows,
and metal windows. The majority of the original school has original wood frame, double pane windows
with ¼” air space between the panes (R-1.8). The 1989 north classroom addition has wood frame, double
pane windows with a half inch air space between the panes (R-2.0). The remaining windows are the
metal frame, double pane, ½” air space windows of the exterior entry ways (R-1.6). There is
approximately 1,410 sf of window area.
The typical doors at the school are insulated metal doors (R-2.0). There are 9 double doors and 30 single
doors of this type throughout the school. The total door area of the school is 1,008 sf.
V.II Mechanical Description
Bayshore Elementary School is heated with two Burnham, cast iron, sectional, gas-fired boilers. Each
model V1117 boiler is rated at 4,186 thousand BTUs per hour (MBH) input and 3,353 MBH output.
Each boiler is equipped with a 3HP Power Flame Burner and Honeywell burner controller. The boilers
were installed in 1999, during the school’s HVAC upgrades. During the initial walk through site visit, it
was reported by ASD that boiler B-1 had a cracked section due to high operating temperatures.
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The boiler pipe loops utilize water as the working fluid. A heat exchanger is used to transfer heat from
the boiler loops to propylene glycol, which is used as the working fluid for all perimeter baseboards and
heating coils. Pumps PMP-1A and PMP-2A are used to circulate hot water from the boilers to the heat
exchanger. Pumps PMP-1 through PMP-13 circulate hot glycol to baseboards and heating coils in various
heating zones throughout the school. A three-way mixing valve on the supply side of the heat exchanger
modulates with an outdoor temperature reset to provide heated glycol between 180F and 120F based on
an outdoor temperature between 0F and 60F, respectively.
An Amtrol Boilermate, 119 gal, indirect water heater provides domestic hot water to the school. Two
Grundfos circulation pumps are utilized; one is used as a heating water injection pump and one is used to
circulate domestic hot water throughout the school.
Conditioned air is provided to the building using three air handling units (AHU) and seven supply fans.
All of the AHUs and supply fans were upgraded in 2003 and are equipped with carbon dioxide sensors,
which are used to modulate outside air dampers to reduce heating of outside air based on occupancy
levels. Carbon dioxide control is an excellent strategy for saving natural gas because less outdoor air is
required to be heated. There are four pods in the school, each with their own supply fan. Separate AHUs
and supply fans serve the gym, MPR, offices and library. Restrooms are exhausted with rooftop exhaust
fans, which were reported to be running constantly year-around. See the Major Equipment List in
Appendix C for a full listing of all AHUs, supply fans, and pumps.
The school’s building energy management and control system has been completely upgraded to new
direct digital controls (DDC), as of 2003. Currently, no pneumatic controls exist in the building and the
pneumatic air compressor has been disconnected. The DDC system has been well maintained and
appeared to be in good working order during the site visit. A Siemens Apogee DDC control system is
utilized to operate the boilers, heating water pumps, supply fans and outdoor temperature reset. There is a
night set-back controlled by the DDC system that lowers building temperatures from 70F to 65F during
unoccupied mode.
V.III Electrical Description
The school is served by a 1200 amp (A), 120/208 volt (V), three phase, 4-wire, underground electrical
service connected to a pad mounted utility transformer. Power is distributed through the school to several
distribution panels that serve local electrical loads. The school has a 35 kilowatt standby diesel generator
used to power selected loads in the event of a power outage. Standby power is distributed through an
automatic transfer switch to a main distribution panel that serves four other smaller distribution panels
scattered throughout the school.
Most fluorescent light fixtures in the school utilize T8 lamps and electronic ballasts, however there were a
few 40W bi-axial light fixtures with electronic ballasts observed throughout the school. The lighting
levels throughout the school were observed to be adequate and within the suggested lighting levels from
the Illumination Engineering Society of North America (IESNA). Occupancy sensors were observed in
most, but not all, spaces including most classrooms, student restrooms and offices. The remaining light
fixtures that are not controlled by occupancy sensors are controlled by wall switches.
The lighting in the corridors is primarily provided by 4' three-lamp T8 light fixtures. These fixtures are
either controlled by rocker switches, located in the utility rooms, or by keyed switches located in the
hallways.
Eight incandescent light fixtures were observed in the school. Six fixtures were located in a pair of
student restrooms, and two other fixtures were located in storage and utility rooms.
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The multipurpose room (MPR) is illuminated with approximately (30) three-lamp T5HO light fixtures.
The illumination in the gymnasium is provided by 18 four-lamp T5HO light fixtures. The light fixtures in
both the gymnasium and the MPR were observed to be controlled by occupancy sensors shutting the
lights off when the space has been unoccupied for an extended period of time.
Exterior lighting consists of 100W and 150W building mounted High Pressure Sodium (HPS) and Metal
Halide (MH) canopy lights and wall packs. 400W HPS pole-mounted 'shoebox' type area lighters in
single and four-head configurations are used in the parking lots and driveways. 400W HPS pole mounted
flood lights are used to light the hockey rink. All of the exterior lights, with the exception of the hockey
rink lights, are controlled by an on-off photo sensor that switches the light fixtures off during the day. The
parking lot lights are also controlled by an input from the security system to shut them off while the
building security system is armed. The hockey rink lights are provided a separate controller that allows
them to be shut off when there is no hockey practice.
Other electricity-using equipment not previously described in the mechanical or electrical sections include
a microwave, electric ranges, various kitchen equipment, and various user equipment such as projectors,
computers, and printers.
V.IV Portable Buildings Description
There are four 960 sf portables at Bayshore Elementary that are operated 40 hours per week as classroom
space. The portables use electricity for space heating, lighting and other plug loads. Two of the portables
were constructed in 1968, one portable in 1981, and one portable in 1993. A single 3,860 sf AkWarm
model was created to model all four portables concurrently.
The onsite portables have 2x4 wood stud wall construction at 16” on-center with R-11 fiberglass batt
insulation in between the studs (R-10.6). The exterior face of the wall is T1-11 siding with drywall on the
interior side of the wall. The exterior wall height is nine feet under the roof eaves, and the end-walls vary
in height from nine feet at the eaves to 11 feet at the roof peak in the center of the end wall. One portable
typically has 1,152 sf of exterior wall area.
The portables have above-grade floors resting on sleepers. Plywood skirting protects the sleepers and
floor construction from weather. The floor construction is plywood flooring resting on 2x8 wood joists. It
is estimated that the floor has R-19 fiberglass batt insulation. One portable typically has 960 sf of floor
area. The portables are all covered by cold roofs, with shingles covering plywood decking. It is estimated
that the roof insulation is R-19 fiberglass batt insulation. One portable typically has 960 sf of roof area.
The windows of the portables include both single pane (R-1.1) and double pane (R-1.8) wood frame
windows. There are typically two metal doors per portable (R-1.7).
All portables are heated with electric resistance perimeter baseboards and electric unit heaters. Each
baseboard has a dial thermostat controlling the temperature set point, which makes a setback during
unoccupied periods difficult. Due to the need to keep these buildings moveable and due to combustion
safety issues, the ASD states its desire to keep all portable buildings on electric heat and not utilize
natural gas heating at this time.
A 120/208V single phase overhead feeder is supplied to each of the portable buildings from the school
building. Each portable building is provided with a small distribution panel where the service terminates.
The distribution panel distributes power to the portable's lighting, heating systems and receptacles. The
lighting in the portables is provided by approximately (64) four-lamp, 4’ long, T12 light fixtures with
magnetic ballasts. The light fixtures are controlled by wall switches. Exterior lighting is provided by a
100W HPS canopy light located at the main exterior door of each portable.
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VI. Historic Energy Consumption and Cost
Tables provided in Appendix A, Energy Benchmark Data Report, represent the electric and natural gas
energy usage for the surveyed facility from January 2009 to December 2010. Chugach provides the
electricity and ENSTAR provides the natural gas to the building. Both utility companies bill the facility
using a commercial rate schedule. The actual utility bills were not provided to be able to verify the data
received to assure 100 percent accuracy of the data.
The AkWarm model of the facility was built to match the facility’s average annual electric and natural
gas consumption, so that a realistic model could be created. The monthly energy consumption of the
AkWarm model matches the actual average monthly consumption of the facility within 25%, which is
adequate for this level of modeling. Overall, the energy consumption trends of the AkWarm model and
the actual facility match appropriately. Graphical representations of the monthly energy consumption are
included in Appendix A.
VI.I Electrical Consumption Data
The electric utility costs consist of several components: a fixed monthly customer charge, an energy usage
charge, fuel surcharge, taxes, and a demand charge. The energy usage and fuel surcharge are based on the
customer's usage as measured in kilowatt-hours (kWh). The usage (kWh) is determined by load wattage
divided by 1,000, times hours running. For example, a 1,000 watt space heater operating for one hour will
use 1 kWh of electricity as would ten, 100 watt lamps operating for one hour or one, 100W lamp
operating for 10 hours. One kWh is equivalent to 3,413 BTU. Utility data used in this report reflects the
historical data provided for the building in a summarized format.
VI.II Natural Gas Consumption Data
The natural gas supplier bills for consumption in CCF of natural gas, where one CCF equals 100 cubic
feet of natural gas. The average heating value of natural gas is 1,000 BTUs per cubic foot, making 1 CCF
equal to 100,000 BTUs or 1 Therm.
VI.III Overall Energy Consumption Data
The overall cost for energy use is calculated by dividing the total cost by the total usage. Based on the
electric and natural gas utility data provided, the average cost for the energy and consumption calculations
at the surveyed facility are summarized in the table below.
Table 4 - Energy Cost and Consumption Data
Energy Cost and Consumption Data
2009 2010 Average
Electric $0.14/kWh $0.12 /kWh $0.13 /kWh
Natural Gas $0.99 /CCF $0.85 /CCF $0.92 /CCF
Total Cost $140,926 $114,602 $127,570
ECI $2.19 /sf $1.78 /sf $1.98 /sf
Electric EUI 28.8 kBtu/sf 27.2 kBtu/sf 28.0 kBtu/sf
Natural Gas EUI 99.9 kBtu/sf 100.3 kBtu/sf 100.1 kBtu/sf
Building EUI 128.8 kBtu/sf 127.5 kBtu/sf 128.1 kBtu/sf
The Energy Cost Index (ECI) is derived by dividing the annual cost by the building square footage. The
building square footage was calculated to be approximately 64,458 square feet. This square footage
includes the 60,618 sf school and 3,840 sf for the four on-site portable buildings.
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The annual EUI is expressed in Thousands of British Thermal Units per Square Foot (kBtu/sf) and can be
used to compare energy consumption of similar building types or to track consumption from year to year
in the same building. The EUI is calculated by converting annual consumption of all fuels used to Btu’s
and then dividing by the area (gross conditioned square footage) of the building. EUI is a good indicator
of the relative potential for energy savings. A comparatively low EUI indicates less potential for large
energy savings. Building architectural, mechanical, and electrical drawings were obtained and utilized to
calculate and verify the gross area of the facility. The gross area was confirmed on the physical site
investigation.
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VII. Equipment Inventory and Photo Survey
Following the completion of the field survey a detailed equipment list was created and is attached as
Appendix C. The major equipment listed are considered to be the major energy consuming equipment in
the building whose replacement could yield substantial energy savings.
An approximate age was assigned to the equipment if a manufactured date was not shown on the
equipment’s nameplate. As listed in the 2011 ASHRAE Handbook for HVAC Applications, Chapter 37,
Table 4, the service life for the equipment along with the remaining useful life in accordance to the
ASHRAE standard are also noted in the equipment list.
Where there are zero (0) years remaining in the estimated useful life of a piece of equipment, this is an
indication that maintenance costs are likely on the rise and more efficient replacement equipment is
available which will lower the operating costs of the unit. Maintenance costs should also fall with the
replacement.
Additionally, photos of various equipment and the building construction were taken during the site visit.
Several photos are included in Appendix F.
CEI made miscellaneous thermographic images of the building using a FLIR T300 Infrared Camera. This
is not a thermographic study, but rather just a few snapshots to illustrate easy-to-identify heat losses.
These thermographic photos are included in Appendix G.
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VIII. Energy Conservation Measures
The following ECMs described here have been calculated by AkWarm Commercial and considered by the
energy audit team as viable projects. ECMs provided below are considered to have viable financial ratios
(SIR>1) or to add value to the building or building operational profiles. For a full list of ECMs considered
and calculated by the energy audit team, including ECMs not recommended at this time, please see
Appendix D.
VIII.I School Energy Conservation Measures
ECM# BES-1 - Replace residential & light commercial refrigerators/freezers older than 5 years
Annual Energy Savings Installed Cost SIR Payback (years)
---<10 years
Due to advances in refrigerators in the previous five years, new Energy Star residential-type and light
commercial-type refrigerators and freezers are much more efficient and result in viable energy savings.
Built-in refrigerators and freezers should be evaluated independently. Replacing existing refrigerators,
which are older than five years old, with new energy star models will typically have paybacks of less than
10 years.
ECM# BES-2 – Setback Thermostat in All Building Spaces
Annual Energy Savings Installed Cost SIR Payback (years)
$4,998 $2,000 32.26 0.4
Currently, there is a night-set back schedule that lowers building temperatures to 65F during unoccupied
mode. However, even greater energy savings exist by reducing the room temperature of the building
spaces further to 60F during unoccupied times. Lowering the heat load of the building will reduce natural
gas consumption. Since the school’s thermostats are already connected to the DDC system, the cost of
this ECM only includes the time required to program a night setback. The 60F night-set back is feasible;
however it may require that other DDC set points be changed, such as the low-temp alarm. This ECM is a
compilation of items 1 and 2 as modeled in AkWarm which are intended to be implemented concurrently.
Details of the individual items are shown in Appendix D.
ECM# BES-3 - Upgrade Restroom Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$41 $180 3.34 4.4
Restrooms 33 and 34 are each illuminated with three incandescent lamps that are controlled by occupancy
sensors. It is recommended that the existing fixtures be re-lamped with either CFL's or LED's. See item 4
in Appendix D for further details.
ECM# BES-4 - Upgrade the Corridor and Cafeteria Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$591 $3,000 2.74 5.1
There are approximately (100) three-lamp 2'x4' fluorescent T8 light fixtures used in the corridors. These
fixtures were observed to be controlled by wall switches in adjacent utility rooms. It is recommended that
approximately (20) ceiling mounted occupancy sensors be installed to switch the light fixtures off when
the corridors are unoccupied. See item 6 in Appendix D for more information.
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ECM# BES-5 - Upgrade the Library, Classroom and Pod Area Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$539 $2,900 2.66 5.4
There are (58) three-lamp 4' fluorescent fixtures, and (11) 32W CFL recessed down lights between the
library and the music room. An additional (36) three-lamp 4' fluorescent fixtures are located in the four
classroom pods. All of these light fixtures are controlled by wall mounted rocker switches. It is
recommended that one ceiling mounted occupancy sensor be installed in each of pod areas and
approximately nine sensors be installed in the library and the music room to control each of lighting
zones.
Additionally, there are two restrooms in the classrooms 3A and 3B that are each illuminated by a two
lamp 23W CFL vanity light fixture controlled by a wall mounted rocker switch. It is recommended that
each of the restrooms be provided with a wall mounted occupancy sensor to switch the lights off when the
space is unoccupied.
This measure is modeled as items 3, 5, 15, and 37. See Appendix D for more information.
ECM# BES-6 - Upgrade Utility Room Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$4 $30 2.11 6.9
Utility room 20C is illuminated by a 60W incandescent lamp that is controlled by a wall mounted rocker
switch. It is recommended that the existing fixture is re-lamped with either a CFL or LED. See item 7 in
Appendix D for further details.
ECM # BES-7 - Repair Burnout Motor with EC motor
Annual Energy Savings Installed Cost SIR Payback (years)
$254 $1,200 1.75 4.7
Replacing pump PMP-10 with a electronically commutated motor will save electricity. New, high
efficiency pumps with electronically commutated (EC) motors have integral speed controls which read
system demand, allowing the pump to slow down with significant electrical savings. Replacing the
existing pump with a new pump with an EC motor now (while the existing motor is still functional) will
result in a high replacement cost. However, upgrading to a pump with an EC motor when the existing
pump fails and is in need of repair will offer a much better payback, because the marginal cost of
choosing a high efficiency EC motor over the standard efficiency replacement motor is only a $1,200
repair cost. Details of the individual item are shown in item 9 in Appendix D.
ECM# BES-8 - Upgrade Office Space Lighting Controls
Annual Energy Savings Installed Cost SIR Payback (years)
$84 $750 1.58 8.9
Ten office spaces were observed during the site visit. The lighting in five of these are controlled by wall
mounted rocker switches, and the others use occupancy sensors for control. The five offices with rocker
switches should be upgraded to ceiling mounted occupancy sensors to switch the lights off when the room
is not occupied. This measure is modeled as items 8, 10 and 21. See Appendix D for more information.
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ECM # BES-9 – Replace Boiler B-2 with New High Efficiency Boiler
Annual Energy Savings Installed Cost SIR Payback (years)
$9,696 $160,000 1.41 16.5
Significant natural gas can be saved by replacing boiler B-2 with a new modulating high efficiency boiler.
To save costs, the existing boiler B-1 would be used as the back-up boiler for supplemental heating. New
modulating and condensing high efficiency boilers vary their heat output rate to match the heating needs
of the building. This allows the boiler to operate at lower return water temperatures and reduce boiler
on/off cycling, which significantly increases the boiler’s efficiency. The new modulating boiler will also
allow the existing boiler to operate at high fire with reduced on/off cycling during times of supplemental
heating. Details of the individual item are shown in item 11 in Appendix D.
ECM# BES-10 - Upgrade the Building Mounted Exterior Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$1,336 $15,600 1.25 11.7
The building mounted exterior lighting at the school consists of (3) 100W and (13) 150W HPS wall pack
light fixtures, and (9) 100W HPS and (3) 150W MH canopy lights. The above mentioned 100W and
150W fixtures should be replaced one-for-one with 50W and 72W LED fixtures, respectively. Installation
costs include the re-use of existing wiring.
Upgrading the pole mounted HPS light fixtures with LED fixtures was evaluated. However, the measure
did not result in an SIR>1 due to the fact that these lights are shut off at night.
This description compiles measures 12, 13, 16 and 17 which were individually modeled in AkWarm. See
Appendix D for details of individual measures.
ECM # BES-11 – Repair Burnout Motors with NEMA Premium Efficiency Motors
Annual Energy Savings Installed Cost SIR Payback (years)
$191 $1,320 1.20 6.9
Replacing fan motors on S-4, 5, 6 & 7 with new NEMA premium efficiency motors will offer significant
energy savings. New high efficiency motors have reduced electrical demands which create significant
energy savings for larger horsepower (HP) motors. Replacing these existing motors while they are still
functional will result in a high replacement cost with a longer payback. However, upgrading these motors
to high efficiency motors when the existing motors are in need of repair will offer a more reasonable
payback because the marginal cost of the high efficiency motor over the standard efficiency motor
replacement is only a $1,320 repair cost. Details of the individual item are shown in item 14 in Appendix
D.
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ECM # BES-12 – Perform Air Sealing to Reduce Air Leakage by 20%
Annual Energy Savings Installed Cost SIR Payback (years)
$1,449 $12,800 1.00 8.8
Unconditioned infiltration air, leaking through doors, windows, and other building envelope penetrations
contributes to the heating load of the building. Methods to decrease the air infiltration into the building
include: sealing around roof and wall penetrations with caulking and insulation, gasketing mechanical
louvers or hoods, providing gaskets to all exterior cover plates, and adding weather stripping around
exterior doors. To achieve a viable economic benefit, $12,800 can be invested and still achieve an SIR > 1
by reducing air leakage by 20%. Details of the ECM are shown in item 18 in Appendix D.
During the site visit several specific areas were observed to have infiltration issues:
There are two unused vents in the gym fan room that used to supply combustion air and supply
air to the two gym boilers, before the boilers were decommissioned. These vents and the old
exhaust stack are resulting in heat loss. It is recommended that the old combustion air and supply
air grills and boiler stack for decommissioned gym boilers be removed, and be sealed and re-
insulated. See pictures 7 and 8 in Appendix G.
There are two wall penetrations for the existing gas line and an old gas line that are contributing
to heat loss. Seal and insulate these penetrations through exterior walls. See pictures 11 and 12
in Appendix G.
There is air infiltration occurring around the windows and doors of the school. Air seal around
existing windows and install new weather-stripping on exterior doors. See pictures 13 and 14 in
Appendix G.
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VIII.II Portable Buildings Energy Conservation Measures
There are four portable buildings that exist on-site and are connected to the electrical service of Bayshore
Elementary School. A single AkWarm model was created to model all four portable buildings combined.
The following ECM savings and installed costs are for all portable buildings combined.
ECM #PB-1 – Setback Thermostat
Annual Energy Savings Installed Cost SIR Payback (years)
$2,650 $8,000 3.89 3
Significant energy savings exist by reducing the room temperature of the portable buildings to 60F during
unoccupied times. However, due to the fact that each portable building has many perimeter electric
baseboard heaters, each with individual dial thermostats, it is difficult to obtain a desired set point in the
portable building. As a result, the temperatures in the portables are typically much higher than required.
Also, temperatures cannot be set back during unoccupied times. It is recommended that a central
programmable thermostat be installed in the portable building that can turn on or off the perimeter electric
baseboards to control occupied and unoccupied temperature set points. See item 1 in Appendix E for
details of the individual item.
ECM #PB-2 – Replace Exterior Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$424 $4,920 1.65 11.6
The portable buildings each have two poorly insulated (R-1.7) metal doors. It is recommended that both
doors be removed and replaced with new R-6.25 minimum (U-0.16) insulated doors. The new doors
should have proper perimeter weather stripping to reduce air infiltration. See item 3 in Appendix E for
details of the individual item.
ECM #PB-3 – Upgrade Portable Building Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$1,269 $12,400 1.49 9.8
The interior lighting in the portables is currently provided by (64) four-lamp fluorescent T12 fixtures with
magnetic ballasts and are controlled by wall mounted rocker switches. The T12 fixtures should be
replaced one-for-one with two-lamp T8 fluorescent light fixtures with electronic program start ballasts. It
is also recommended that each of the (4) portables be provided with a new ceiling mounted occupancy
sensor to switch the lights off when the space is unoccupied. Additionally, the one each 100W HPS
fixtures used for exterior illumination should be replaced with a 50W LED fixture with an integral
photocell on each portable building.
This description is for a compilation of several ECMs that are intended to be implemented at the same
time, however, due to constraints with the AkWarm modeling software the different lighting
configurations were modeled separately. See items 2 and 5 in Appendix E for details of individual
measures.
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ECM #PB-4 – Seal Building Envelope and Reduce Infiltration by 30%
Annual Energy Savings Installed Cost SIR Payback (years)
$1,182 $8,000 1.24 6.8
By tightening the building envelope with air sealing improvements, infiltration into the building will be
reduced. This in turn will reduce the heating load required by the building and reduce the amount of
electricity being used by the electric heaters. Reducing infiltration by air sealing the building envelope
will produce energy savings. While a blower door test was not completed, it is anticipated that air leakage
is occurring around old weather stripping around doors, window frames, and wall and roof penetrations.
Methods to decrease the infiltration into the building include: sealing around the windows and doors with
caulking and insulation, adding new weather stripping to doors, providing gaskets to all exterior cover
plates and sealing all roof and wall penetrations. See item 4 in Appendix E for details of the individual
item.
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VIII.III Administrative Controls for Energy Conservation and Optimization
While the intent of many energy conservation measures is to increase the efficiency of fuel-burning and
electrical equipment, an important factor of energy consumption lies in the operational profiles which
control the equipment usage. Such profiles can be managed by administrative controls and departmental
leadership. They determine how and when fuel-burning and electrical equipment are used, and therefore
have a greater impact on energy savings potential than simply equipment upgrades alone. Significant
energy cost savings can be realized when ECMs are combined with efficient-minded operational profiles.
Operational profiles may be outlined by organization policy or developed naturally or historically. These
profiles include, but are not limited to: operating schedules, equipment setpoints and control strategies,
maintenance schedules, and site and equipment selection.
Optimization of operational profiles can be accomplished by numerous methods so long as the intent is
reduction in energy-using equipment runtime. Due to the numerous methods of optimization, energy cost
savings solely as a result of operational optimization are difficult to predict. Quantification, however, is
easy to accomplish by metering energy usage during and/or after implementation of energy-saving
operational profiles and ECMs. Shown below are some examples which have proven successful for other
organizations.
Optimization of site selection includes scheduling and location of events. If several buildings in a given
neighborhood are all lightly used after regularly occupied hours, energy savings can be found when after-
hours events are consolidated and held within the most energy efficient buildings available for use. As a
result, unoccupied buildings could be shut down to the greatest extent possible to reduce energy
consumption.
Two operational behaviors which can be combined with equipment upgrades are operating schedules and
equipment control strategies including setpoints. Occupancy and daylight sensors can be programmed to
automatically shut off or dim lighting when rooms are unoccupied or sufficiently lit from the sun.
Operating schedules can be optimized to run equipment only during regular or high-occupancy periods.
Also, through a central control system, or with digital programmable thermostats, temperature setpoints
can be reduced during low-occupancy hours to maximize savings. In addition, sporadically used
equipment can be shut down during unoccupied hours to further save energy. In general, having
equipment operating in areas where no occupants are present is inefficient, and presents an opportunity
for energy savings.
Operational profiles can also be implemented to take advantage of no- or low-cost ECMs. Examples
include heating plant optimizations (boiler section cleaning, boiler flush-through cleaning) and tighter
controls of equipment setbacks and shutdowns (unoccupied zones equipment shutdown, easier access to
and finer control of equipment for after-hours control). In a large facility management program,
implementation of these measures across many or all sites will realize dramatic savings due to the
quantity of equipment involved.
Changes to building operational profiles can only be realized while simultaneously addressing health,
safety, user comfort, and user requirements first. It is impractical to expect users to occupy a building or
implement operational behaviors which do not meet such considerations. That said, it is quite practical for
management groups to implement administrative controls which reduce losses brought about by excess
and sub-optimum usage.
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Appendix A
Energy Benchmark Data
First Name Last Name Middle Name Phone
Steven Golab 348-5132
State Zip
AK
Monday-
Friday
Saturday Sunday Holidays
8-4:30
Average # of
Occupants
During
601
Renovations
Date
Facility Zip
261,500
99517
Email
Anchorage
Primary
Operating
Hours
Contact Person
City
Anchorage
Date
07/22/11
Facility Address
Mailing Address
Golab_Steven@asdk12.org
Details
10500 Bayshore Dr
Building Name/ Identifier Building Usage Building Square Footage
REAL Preliminary Benchmark Data Form
PART I – FACILITY INFORMATION
Facility Owner
MOA
Facility Owned By
Building Type
Mixed
Community Population
Facility City
1976
Municipal
Government/Subdivision
Bayshore Elementary Education - K - 12 64,458
Year Built
Date
1976
1991
Total
PART II – ENERGY SOURCES
Heating Oil Electricity Natural Gas Propane Wood Coal
$ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton
Other energy
sources?
Describe
960 SF x 4 Portables = 3840 SF Portables
1. Please check every energy source you use in the table below. If known, please enter the base rate you
pay for the energy source.
2. Provide utilities bills for the most recent two-year period for each energy source you use.
17529 SF Classrooms and Gym
43089 SF Original Structure
Details
64458SF
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Bayshore Elementary
Buiding Size Input (sf) =64,458
2009 Natural Gas Consumption (Therms)64,412.00
2009 Natural Gas Cost ($)64,004
2009 Electric Consumption (kWh)544,701
2009 Electric Cost ($)76,922
2009 Oil Consumption (Therms)0.00
2009 Oil Cost ($)0
2009 Propane Consumption (Therms)0.00
2009 Propane Cost ($)0.00
2009 Coal Consumption (Therms)0.00
2009 Coal Cost ($)0.00
2009 Wood Consumption (Therms)0.00
2009 Wood Cost ($)0.00
2009 Thermal Consumption (Therms)0.00
2009 Thermal Cost ($)0.00
2009 Steam Consumption (Therms)0.00
2009 Steam Cost ($)0.00
2009 Total Energy Use (kBtu)8,300,265
2009 Total Energy Cost ($)140,926
Annual Energy Use Intensity (EUI)
2009 Natural Gas (kBtu/sf) 99.9
2009 Electricity (kBtu/sf)28.8
2009 Oil (kBtu/sf) 0.0
2009 Propane (kBtu/sf) 0.0
2009 Coal (kBtu/sf) 0.0
2009 Wood (kBtu/sf) 0.0
2009 Thermal (kBtu/sf) 0.0
2009 Steam (kBtu/sf) 0.0
2009 Energy Utilization Index (kBtu/sf)128.8
Annual Energy Cost Index (ECI)
2009 Natural Gas Cost Index ($/sf)0.99
2009 Electric Cost Index ($/sf)1.19
2009 Oil Cost Index ($/sf)0.00
2009 Propane Cost Index ($/sf)0.00
2009 Coal Cost Index ($/sf)0.00
2009 Wood Cost Index ($/sf)0.00
2009 Thermal Cost Index ($/sf)0.00
2009 Steam Cost Index ($/sf)0.00
2009 Energy Cost Index ($/sf)2.19
2010 Natural Gas Consumption (Therms)64,677.00
2010 Natural Gas Cost ($)55,297
2010 Electric Consumption (kWh)512,948
2010 Electric Cost ($)59,3052010 Electric Cost ($)59,305
2010 Oil Consumption (Therms)0.00
2010 Oil Cost ($)0
2010 Propane Consumption (Therms)0.00
2010 Propane Cost ($)0
2010 Coal Consumption (Therms)0.00
2010 Coal Cost ($)0
2010 Wood Consumption (Therms)0.00
2010 Wood Cost ($)0
2010 Thermal Consumption (Therms)0.00
2010 Thermal Cost ($)0
2010 Steam Consumption (Therms)0.00
2010 Steam Cost ($)0
2010 Total Energy Use (kBtu)8,218,392
2010 Total Energy Cost ($)114,602
Annual Energy Use Intensity (EUI)
2010 Natural Gas (kBtu/sf)100.3
2010 Electricity (kBtu/sf)27.2
2010 Oil (kBtu/sf)0.0
2010 Propane (kBtu/sf)0.0
2010 Coal (kBtu/sf)0.0
2010 Wood (kBtu/sf)0.0
2010 Thermal (kBtu/sf)0.0
2010 Steam (kBtu/sf)0.0
2010 Energy Utilization Index (kBtu/sf)127.5
Annual Energy Cost Index (ECI)
2010 Natural Gas Cost Index ($/sf)0.86
2010 Electric Cost Index ($/sf)0.92
2010 Oil Cost Index ($/sf)0.00
2010 Propane Cost Index ($/sf)0.00
2010 Coal Cost Index ($/sf)0.00
2010 Wood Cost Index ($/sf)0.00
2010 Thermal Cost Index ($/sf)0.00
2010 Steam Cost Index ($/sf)0.00
20010 Energy Cost Index ($/sf)1.78
Note:
1 kWh = 3,413 Btu's
1 Therm = 100,000 Btu's
1 CF ≈ 1,000 Btu's
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Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Bayshore ElementaryNatural GasBtus/CCF =100,000Provider Customer # Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($)Enstar NGC333 Jan-09 12/31/08 02/03/09349,5609,560$9,640$1.01Enstar NGC333 Feb-09 02/03/09 03/02/09277,1267,126$7,207$1.01Enstar NGC333 Mar-09 03/02/09 04/02/09317,1557,155$7,236$1.01Enstar NGC333 Apr-09 04/02/09 04/30/09285,2025,202$5,282$1.02Enstar NGC333 May-09 04/30/09 06/02/09333,8303,830$3,899$1.02Enstar NGC333 Jun-09 06/02/09 07/01/09292,3802,380$2,453$1.03Enstar NGC333 Jul-09 07/01/09 08/03/09332,0772,077$2,144$1.03Enstar NGC333 Aug-09 08/03/09 09/01/09292,5392,539$2,614$1.03Enstar NGC333 Sep-09 09/01/09 10/01/09303,9333,933$4,009$1.02Enstar NGC333 Oct-09 10/01/09 10/30/09295,1935,193$5,277$1.02Enstar NGC333 Nov-09 10/30/09 12/01/09327,5477,547$7,630$1.01Enstar NGC333 Dec-09 12/01/09 01/04/10347,8707,870$6,613$0.84Enstar NGC333 Jan-10 01/04/10 02/02/10298,0518,051$6,728$0.84Enstar NGC333 Feb-10 02/02/10 03/02/10286,3506,350$5,317$0.84Enstar NGC333 Mar-10 03/02/10 04/02/10316,7856,785$5,729$0.84Enstar NGC333 Apr-10 04/02/10 05/03/10315,4135,413$4,584$0.85Enstar NGC333 May-10 05/03/10 05/28/10253,8803,880$3,320$0.86Enstar NGC333 Jun-10 05/28/10 06/30/10332,6832,683$2,301$0.86Enstar NGC333 Jul-10 06/30/10 08/02/10332,4912,491$2,143$0.86Enstar NGC333 Aug-10 08/02/10 08/31/10292,6062,606$2,456$0.94Enstar NGC333 Sep-10 08/31/10 10/04/10343,5783,578$3,181$0.89Enstar NGC333 Oct-10 10/04/10 10/29/10255,5485,548$4,865$0.88Enstar NGC333 Nov-10 10/29/10 11/30/10326,9166,916$5,871$0.85Enstar NGC333 Dec-10 11/30/10 12/30/103010,37610,376$8,802$0.85Jan - 09 to Dec - 09 total:64,41264,4120.00$64,004$0Jan - 10 to Dec - 10 total:64,67764,6770.00$55,297$0$0.99$0.85Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Bayshore Elementary Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
$6,000 $8,000 $10,000 $12,000 6,0008,00010,00012,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Bayshore Elemementary School - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($)$0 $2,000 $4,000 02,0004,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Date (Mon - Yr)Bayshore Elementary Draft Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary Final Energy Audit Report
Bayshore ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)CEA 1-7996948 Jan-09 12/19/2008 1/21/20093355,7071,901186$8,623$0.150CEA 1-7996948 Feb-09 1/21/2009 2/12/20092252,1331,779173$8,014$0.150CEA 1-7996948 Mar-09 2/12/2009 3/24/20094051,8181,769167$7,907$0.150CEA 1-7996948 Apr-09 3/24/2009 4/22/20092947,1671,610159$7,048$0.150CEA 1-7996948 May-09 4/22/2009 5/21/20092937,5601,282157$5,892$0.160CEA 1-7996948 Jun-09 5/21/2009 6/22/20093220,401696136$3,608$0.180CEA 1-7996948 Jul-09 6/22/2009 7/21/20092923,614806142$3,853$0.160CEA 1-7996948 Aug-09 7/21/2009 8/20/20093032,7551,118150$4,683$0.140CEA 1-7996948 Sep-09 8/20/2009 9/21/20093246,7041,594164$5,914$0.130CEA 1-7996948 Oct-09 9/21/2009 10/20/20092956,7751,938174$6,983$0.120CEA 1-7996948 Nov-09 10/20/2009 11/19/20093058,8552,009179$7,172$0.120CEA 1-7996948 Dec-09 11/19/2009 12/18/20092961,2122,089186$7,225$0.120 CEA 1-7996948 Jan-10 12/18/2009 1/18/20103160,0772,050186$6,665$0.110CEA 1-7996948 Feb-10 1/18/2010 2/17/20103048,0141,639176$5,436$0.110CEA 1-7996948 Mar-10 2/17/2010 3/23/20103444,8231,530176$5,312$0.120CEA 1-7996948 Apr-10 3/23/2010 4/22/20103047,1641,610151$5,512$0.120CEA 1-7996948 May-10 4/22/2010 5/24/20103238,0481,299151$4,607$0.120CEA 1-7996948 Jun-10 5/24/2010 6/22/20102917,23258874$2,225$0.130CEA 1-7996948 Jul-10 6/22/2010 7/23/20103118,764640130$2,319$0.120CEA 1-7996948 Aug-10 7/23/2010 8/23/20103133,6571,149141$4,090$0.120CEA 1-7996948 Sep-10 8/24/2010 9/23/20103043,6721,491165$4,904$0.110CEA 1-7996948 Oct-10 9/24/2010 10/25/20103151,1471,746165$5,816$0.110CEA 1-7996948 Nov-10 10/26/2010 11/24/20102952,2901,785212$5,907$0.110CEA 1-7996948 Dec-10 11/25/2010 12/28/20103358,0601,982212$6,512$0.110544,70118,5911973$76,9220512,94817,5071939$59,3050$0.14$0.12Jan - 09 to Dec - 09 total:Jan - 10 to Dec - 10 total:Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Bayshore Elementary Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. CIRI-ANC-CAEC-08 Coffman Engineers, Inc. AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
$5,000$6,000$7,000$8,000$9,000$10,00030,00040,00050,00060,00070,000Electric Cost ($)Electric Consumption (kWh)Bayshore Elementary School - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$1,000$2,000$3,000$4,000010,00020,00030,000Electric Cost ($)Electric Consumption (kWh)Date (Mon - Yr)Bayshore Elementary Draft Energy Audit Report Coffman Engineers, Inc. AkWarm No. CIRI-ANC-CAEC-08 Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary Final Energy Audit Report
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix B
AkWarm Commercial Reports
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Bayshore Elementary School
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 3/14/2012 1:27PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Bayshore Elementary School Auditor Company: Coffman Engineers
Address: 10500 Bayshore Dr Auditor Name: Walter Heins, PE, CEA, CxA
City: Anchorage Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Calvin Mundt
Client Address: 1301 Labar St.
Anchorage, AK
99515
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 742-5213 Auditor Comment:
Client FAX:
Design Data
Building Area: 60,618 square feet Design Heating Load: Design Loss at Space:
2,928,768 Btu/hour
with Distribution Losses: 2,975,012 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency
and 25% Safety Margin: 4,535,080 Btu/hour
Note: Additional Capacity should be added for DHW
load, if served.
Typical Occupancy: 610 people Design Indoor Temperature: 70 deg F (building
average)
Actual City: Anchorage Design Outdoor Temperature: -18 deg F
Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F-days
Utility Information
Electric Utility: Chugach Electric - Commercial - Sm Natural Gas Provider: Enstar Natural Gas -
Commercial - Sm
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.920/ccf
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary School Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Vent. Fans Service Fees Total Cost Existing Building $50,782 $0 $8,860 $20,082 $0 $42,611 $0 $0 $7,982 $0 $130,316 With Proposed Retrofits $31,414 $0 $3,105 $15,638 $0 $41,924 $0 $0 $7,982 $0 $100,063 SAVINGS $19,368 $0 $5,755 $4,444 $0 $687 $0 $0 $0 $0 $30,254
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary School $0$20,000$40,000$60,000$80,000$100,000$120,000$140,000Existing RetrofitVentilation and FansSpace HeatingOther ElectricalLightingDomestic Hot WaterAnnual Energy Costs by End Use
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary School Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Natural Gas (Right) Consumption (Orange).
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary School Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange).
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Bayshore Elementary School Monthly Modeled Consumption (Blue compared to Actual Natural Gas Consumption (Orange) .
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Portable Buildings
ENERGY AUDIT REPORT – PROJECT SUMMARY –Created 3/14/2012 1:17PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Bayshore Elementary School - Portable
Buildings
Auditor Company: Coffman Engineers, Inc.
Address: 10500 Bayshore Dr Auditor Name: Walter Heins, PE, CEA, CxA
City: Anchorage Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Calvin Mundt
Client Address: 1301 Labar St.
Anchorage, AK
99515
Auditor Phone: (907) 276-6664
Auditor FAX: (907) 276-5042
Client Phone: (907) 742-5213 Auditor Comment:
Client FAX:
Design Data
Building Area: 3,840 square feet. This is the total
area of the four on-site portables. Each portable is
960 sf.
Design Heating Load: Design Loss at Space: 70,709
Btu/hour
with Distribution Losses: 70,709 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency
and 25% Safety Margin: 107,787 Btu/hour
Note: Additional Capacity should be added for DHW
load, if served.
Typical Occupancy: 100 people Design Indoor Temperature: 70 deg F (building
average)
Actual City: Anchorage Design Outdoor Temperature: -18 deg F
Weather/Fuel City: Anchorage Heating Degree Days: 10,816 deg F-days
Utility Information
Electric Utility: Chugach Electric - Commercial -
Sm
Natural Gas Provider: Enstar Natural Gas-
Residential
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Portable Buildings Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Vent Fans Service Fees Total Cost Existing Building $10,620 $0 $0 $3,300 $0 $434 $0 $0 $0 $0 $14,354 With Proposed Retrofits $4,383 $0 $0 $469 $0 $434 $0 $0 $0 $0 $5,286 SAVINGS $6,238 $0 $0 $2,831 $0 $0 $0 $0 $0 $0 $9,068
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 Portable Buildings $0$2,000$4,000$6,000$8,000$10,000$12,000$14,000$16,000Existing RetrofitSpace HeatingOther ElectricalLightingAnnual Energy Costs by End Use
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix C
Major Equipment List
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) B-1 BOILER RM BUILDING HEATING BURNHAM V1117 CAST IRON GAS FIRED 4,186 MBH INPUT 3,353 MBH OUTPUT 80% 3 HP BURNER MOTOR 30 17 B-2 BOILER RM BUILDING HEATING BURNHAM V1117 CAST IRON GAS FIRED 4,186 MBH INPUT 3,353 MBH OUTPUT 80% 3 HP BURNER MOTOR 30 17 SF-1 BOILER RM SUPPLY FAN FOR COMBUSTION AIR NOT ACCESSIBLE - DIRECT DRIVE 1,030 CFM MIN FOR 1 BOILER 2,035 CFM FOR 2 BOILERS N/A 2 HP 15 3 AHU-1 GYM FAN ROOM GYM VENTILATION TRANE CLIMATE CHANGER BALDOR M3311T-B MOTOR CENTRIFUGAL 11,072 CFM 1.7” TSP 85.5% 7.5 HP 25 16 AHU-2 EAST CLASS RM ADDITION VENTILATION TRANE CLIMATE CHANGER BALDOR M3318T-B MOTOR CENTRIFUGAL 7320 CFM 1.5” SP 82.5% 5 HP 25 16 AHU-3 RM 33 LOFT RM 33 VENTILATION TRANE CABINET FAN AO SMITH H582 MOTOR CENTRIFUGAL 1450 CFM 1.25” ESP NOT ON NAMEPLATE, 80% ESTIMATED 0.75 HP 25 16 S-1 RM 33 LOFT MPR VENTILATION TRANE CLIMATE CHANGER BALDOR M3218T-8 MOTOR CENTRIFUGAL 8960 CFM 1.25” TSP 87.5% 5 HP 25 16 S-2 RM 33 LOFT RM 33 VENTILATION TRANE CLIMATE CHANGER BALDOR RL345A MOTOR CENTRIFUGAL 1360 CFM 1” TSP 64% 0.5 HP 25 16 S-3 BOILER RM OFFICE & LIBRARY VENTILATION TRANE CLIMATE CHANGER BALDOR M3313T MOTOR CENTRIFUGAL 12,875 CFM 2” TSP 89.5% 10 HP 25 16
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) S-4 POD 3 FAN RM VENTILATION TRANE CLIMATE CHANGER BALDOR M3211T-8 MOTOR CENTRIFUGAL 5680 CFM 1.5” TSP 82.5% 3 HP 25 16 S-5 POD 2 FAN RM VENTILATION TRANE CLIMATE CHANGER BALDOR M3211T-8 MOTOR CENTRIFUGAL 5680 CFM 1.5” TSP 82.5% 3 HP 25 16 S-6 POD 1 FAN RM VENTILATION TRANE CLIMATE CHANGER BALDOR M3211T-8 MOTOR CENTRIFUGAL 6000 CFM 1.5” TSP 82.5% 3 HP 25 16 S-7 POD 4 FAN RM VENTILATION TRANE CLIMATE CHANGER BALDOR M3211T-8 MOTOR CENTRIFUGAL 6040 CFM 1.5” TSP 82.5% 3 HP 25 16 PMP-1A BOILER RM HX-1 CIRC PUMP UNIMOUNT B071A MOTOR INLINE 295 GPM 20’ 84% 3 HP 10 0 PMP-1B BOILER RM BOILER RECIRC MARATHON ELECTRIC G513 MOTOR INLINE 35 GPM 15’ NOT ON NAMEPLATE, ~80% 0.33 HP 10 0 PMP-2A BOILER RM HX-1 CIRC PUMP UNIMOUNT B071A MOTOR INLINE 295 GPM 20’ 84% 3 HP 10 0 PMP-2B BOILER RM BOILER RECIRC MARATHON ELECTRIC G513 MOTOR INLINE 35 GPM 15’ NOT ON NAMEPLATE, ~80% 0.33 HP 10 0 PMP-1 BOILER RM HEATING CIRC PUMP US ELECTRICAL MOTORS D32E2H MOTOR BASE MOUNTED 100 GPM 37’ 84% 1.5 HP 20 11 PMP-2 BOILER RM PMP-1 DUPLEX PUMP US ELECTRICAL MOTORS D32E2H MOTOR BASE MOUNTED 100 GPM 37’ 84% 1.5 HP 20 11 PMP-3 BOILER RM HEATING CIRC PUMP MARATHON ELECTRIC INVERTER DUTY E901 MOTOR BASE MOUNTED 60 GPM 24’ 82.5% 1 HP 20 11
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) PMP-4 BOILER RM PMP-3 DUPLEX MARATHON ELECTRIC INVERTER DUTY E901 MOTOR BASE MOUNTED 60 GPM 24’ 82.5% 1 HP 20 11 PMP-5 BOILER RM MPR FAN CIRC PUMP BELL & GOSSETT M80121 MOTOR INLINE 60 GPM 14’ NOT ON NAMEPLATE, ~80% 1/3 HP 10 1 PMP-6 BOILER RM FAN S-1 CIRC PUMP BELL & GOSSETT M80121 MOTOR INLINE 60 GPM 14’ NOT ON NAMEPLATE, ~80% 1/3 HP 10 9 PMP-7 BOILER RM HEATING CIRC BELL & GOSSETT M10711 MOTOR INLINE 10 GPM 16’ NOT ON NAMEPLATE, ~80% 1/6 HP 10 10 PMP-8a GYM FAN RM. ALSO TAGGED AS PMP-1 GYM HEATING CIRC MARATHON ELECTRIC MOTOR E904 MOTOR BASE MOUNTED 100 GPM 60’ 86.5% 3 HP 20 16 PMP-9a GYM FAN RM. ALSO TAGGED AS PMP-2 GYM HEATING CIRC DUPLEX MARATHON ELECTRIC MOTOR E904 MOTOR BASE MOUNTED 100 GPM 60’ 86.5% 3 HP 20 16 PMP-10a GYM FAN RM. ALSO TAGGED AS PMP-3 AHU-1 HEATING COIL CIRC PUMP BELL & GOSSETT M80039-B09 MOTOR INLINE - NOT ON NAMEPLATE, ~80% ¾ HP 10 6 PMP-11 BOILER RM HEATING CIRC BELL & GOSSETT M80039 MOTOR INLINE 60 GPM 30’ NOT ON NAMEPLATE, ~80% 1 HP 10 1
Bayshore Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) PMP-12 BOILER RM HEATING CIRC BELL & GOSSETT 903581 MOTOR INLINE 24 GPM 20’ NOT ON NAMEPLATE, ~80% 0.5 HP 10 1 PMP-13 BOILER RM HEATING CIRC BELL & GOSSETT 903574 MOTOR INLINE 36 GPM 40’ NOT ON NAMEPLATE, ~80% 1.5 HP 10 1 PMP-14b BOILER RM BOILER TO AMTROL CIRC GRUNDFOS UP26-96F MOTOR INLINE - NOT ON NAMEPLATE, ~80% 205W 10 6 PMP-15b BOILER RM AMTROL DHW CIRC GRUNDFOS UP15-55SFC MOTOR INLINE - NOT ON NAMEPLATE, ~80% 87W 10 6 WH-1 BOILER RM INDIRECT WATER HEATER FOR DHW AMTROL BOILER-MATE INDIRECT 119 GAL - - 15 11 Note: a The tag names for pumps PMP-8, 9, and 10 were designated in this report to avoid conflicting tag numbers. Pumps PMP-8, 9, and 10 were tagged as PMP-1, 2, and 3, respectively, in prior mechanical drawings. b PMP-14 and 15 are unnamed. For inventory purposes in this report they were tagged as PMP-14 and 15.
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix D
Energy Conservation Measures
Bayshore Elementary
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
The following tables consist of raw output data from the AkWarm Commercial program used to model
energy costs and calculate energy savings and financial ratios. These tables represent all of the energy
conservation measures calculated and considered by the energy audit team. However, ECMs included in
the Executive Summary and Section VIII are recommended by the energy audit team due to their viable
financial ratios (SIR>1) or due to their value added.
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback
Thermostat:
Classrooms
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Classrooms space.
$4,102 $1,000 52.94 0.2
2 Setback
Thermostat:
Gym and MPR
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gym and MPR space.
$896 $1,000 11.57 1.1
3 Lighting:
Classroom Pod
Area
Add new Occupancy
Sensor
$192 $800 3.34 4.2
4 Lighting:
Student
Restroom
Replace with 6 FLUOR
CFL, Spiral 23 W
$41 $180 3.34 4.4
5 Lighting:
Classrooms
Library and
Music
Add new Occupancy
Sensor
$327 $1,600 2.98 4.9
6 Lighting:
Corridor
Add new Occupancy
Sensor
$591 $3,000 2.74 5.1
7 Lighting: Utility Replace with FLUOR
CFL, Spiral 23 W
$4 $30 2.11 6.9
8 Lighting: Office Add new Occupancy
Sensor
$62 $450 1.92 7.3
9 Other Electrical:
PMP-10
Replace with New EC
Motor (3/4 HP)
$254 $1,200 1.75 4.7
10 Lighting: Office Add new Occupancy
Sensor
$15 $150 1.44 10.1
11 HVAC And
DHW
Replace Boiler B-2 with
New High Efficiency
Boiler
$9,696 $160,000 1.41 16.5
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
12 Lighting:
Exterior Lighting
Replace with 13 LED 72W
Module StdElectronic
$715 $7,800 1.34 10.9
13 Lighting:
Exterior Lighting
Replace with 3 LED 72W
Module StdElectronic
$165 $1,800 1.34 10.9
14 Other Electrical:
S-4, S-5, S-6 and
S-7 Fan Motors
Replace with 4 New
NEMA Premium Motors
(3 HP)
$191 $1,320 1.20 6.9
15 Lighting:
Classrooms
Library and
Music
Add new Occupancy
Sensor
$17 $200 1.19 11.8
16 Lighting:
Exterior Lighting
Replace with 3 LED 50W
Module StdElectronic
$114 $1,500 1.11 13.1
17 Lighting:
Exterior Lighting
Replace with 9 LED 50W
Module StdElectronic
$342 $4,500 1.11 13.1
18 Air Tightening Perform air sealing to
reduce air leakage by 20%.
$1,449 $12,800 1.01 8.8
19 Below- (part or
all) Grade Wall:
Gym Entry Way
Panels
Install R-20 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$97 $2,400 0.94 24.7
20 Cathedral
Ceiling: Original
Roof
Install R-14 rigid board
insulation. No cost
included for covering
insulation.
$2,844 $74,417 0.89 26.2
21 Lighting: Office Add new Occupancy
Sensor
$7 $150 0.72 20.2
22 Other Electrical:
S-2 Fan
Replace with New NEMA
Premium Motor (0.5 HP)
$25 $320 0.64 13
23 Exterior Door:
Exterior Metal
Doors
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$516 $19,676 0.61 38.2
24 Cathedral
Ceiling: Gym
and Classroom
Addition Roof
Install R-10 rigid board
insulation. No cost
included for covering
insulation.
$689 $27,713 0.58 40.2
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
25 Below- (part or
all) Grade Wall:
North Classroom
Addition
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$298 $13,615 0.51 45.6
26 Other Electrical:
PMP-1 & PMP-2
Replace with 2 New
NEMA Premium Motors
(1.5 HP x 2)
$49 $860 0.47 17.7
27 Other Electrical:
PMP-3 & PMP-4
Replace with 2 New
NEMA Premium Motors
(1 HP x 2)
$29 $540 0.44 18.7
28 Lighting:
Exterior Lighting
Replace with 14 LED
150W Module
StdElectronic
$825 $28,000 0.43 33.9
29 Lighting:
Kitchen Storage
Add new Occupancy
Sensor
$4 $150 0.43 33.9
30 Lighting:
Exterior Lighting
Replace with 2 LED (4)
150W Module (4)
StdElectronic
$471 $16,000 0.43 33.9
31 Above-Grade
Wall: Upper
Walls of Original
Bldg
Install R-10 rigid foam
board to exterior and cover
with T1-11 siding or
equivalent.
$864 $51,332 0.39 59.4
32 Lighting:
Custodian/Storag
e
Replace with FLUOR
CFL, Spiral 23 W and Add
new Occupancy Sensor
$5 $180 0.38 35.9
33 Lighting:
Custodian/Storag
e
Add new Occupancy
Sensor
$3 $150 0.34 43.4
34 Below- (part or
all) Grade Wall:
GYM
EXTERIOR
WALL
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$390 $28,911 0.31 74.2
35 Lighting:
Exterior Lighting
Replace with 6 LED 150W
Module StdElectronic
$249 $12,000 0.30 48.2
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
36 Below- (part or
all) Grade Wall:
Original Walls
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$3,260 $468,568 0.16 143.7
37 Lighting: Class
Restroom
Add new Occupancy
Sensor
$3 $300 0.16 89.7
38 Window/Skyligh
t: Original Wood
Frame Windows
Replace existing window
with U-0.30 vinyl window
$396 $49,874 0.13 125.9
39 Window/Skyligh
t: North
Classroom
Addition
Windows
Replace existing window
with U-0.30 vinyl window
$54 $8,312 0.11 155.3
TOTAL $30,254 $1,002,800 0.58 33.1
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
19 Below- (part or all)
Grade Wall: Gym
Entry Way Panels
Wall Type: Masonry
Insul. Sheathing: EPS Type I -
psi 10, 0.12 inches
Masonry Wall: Brick, common
- 1 inch
Modeled R-Value: 1.5
Install R-20 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$2,400 $97
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
20 Cathedral Ceiling:
Original Roof
Framing Type: Standard
Framing Spacing: 24 inches
Insulated Sheathing: EPS Type
I - psi 10, 3 inches
Bottom Insulation Layer: None
Top Insulation Layer: None
Modeled R-Value: 14.5
Install R-14 rigid board
insulation. No cost included
for covering insulation.
$74,417 $2,844
24 Cathedral Ceiling:
Gym and
Classroom
Addition Roof
Framing Type: Standard
Framing Spacing: 24 inches
Insulated Sheathing: EPS Type
I - psi 10, 4 inches
Bottom Insulation Layer: None
Top Insulation Layer: None
Modeled R-Value: 18.4
Install R-10 rigid board
insulation. No cost included
for covering insulation.
$27,713 $689
25 Below- (part or all)
Grade Wall: North
Classroom
Addition
Wall Type: Strapped Masonry
Insul. Sheathing: None
Masonry Wall: Concrete block,
2 core
Framed Wall: 2 x 4, 16" on
center
R-11 Batt:FG or RW, 3.5
inches
Modeled R-Value: 11.3
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$13,615 $298
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
31 Above-Grade Wall:
Upper Walls of
Original Bldg
Wall Type: Single Stud
Siding Configuration: Just
Siding
Insul. Sheathing: None
Structural Wall: 2 x 4, 16
inches on center
EPS Type I - psi 10, 0.38 inches
Window and door headers: Not
Insulated
Modeled R-Value: 4.8
Install R-10 rigid foam
board to exterior and cover
with T1-11 siding or
equivalent.
$51,332 $864
34 Below- (part or all)
Grade Wall: GYM
EXTERIOR
WALL
Wall Type: Masonry
Insul. Sheathing: EPS Type I -
psi 10, 3.5 inches
Masonry Wall: Concrete block,
2 core
Modeled R-Value: 15.4
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$28,911 $390
36 Below- (part or all)
Grade Wall:
Original Walls
Wall Type: Masonry
Insul. Sheathing: EPS Type I -
psi 10, 2 inches
Masonry Wall: Concrete block,
2 core
Modeled R-Value: 9.6
Install R-10 rigid foam
board to interior or exterior
side of wall. Does not
include cost of coverings.
$468,568 $3,260
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
23 Exterior Door:
Exterior Metal
Doors
Door Type: Entrance, Metal,
EPS core, metal edge, quarter
lite
Modeled R-Value: 2
Remove existing door and
install standard pre-hung U-
0.16 insulated door,
including hardware.
$19,676 $516
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
38 Window/Skylight:
Original Wood
Frame Windows
Glass: Double, glass
Frame: Wood\Vinyl
Spacing Between Layers:
Quarter Inch
Gas Fill Type: Air
Modeled U-Value: 0.56
Solar Heat Gain Coefficient
including Window Coverings:
0.46
Replace existing window
with U-0.30 vinyl window
$49,874 $396
39 Window/Skylight:
North Classroom
Addition Windows
Glass: Double, glass
Frame: Wood\Vinyl
Spacing Between Layers: Half
Inch
Gas Fill Type: Air
Modeled U-Value: 0.51
Solar Heat Gain Coefficient
including Window Coverings:
0.46
Replace existing window
with U-0.30 vinyl window
$8,312 $54
Air Leakage
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
18 Air Tightness estimated as: 0.66
cfm/ft2 of above-grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 20%.
$12,800 $1,449
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
11 Replace Boiler B-2 with New High Efficiency Boiler $160,000 $9,696
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 Classrooms Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Classrooms space.
$1,000 $4,102
2 Gym and MPR Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Gym and MPR space.
$1,000 $896
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
3 Classroom Pod
Area
36 FLUOR (3) T8 4' F32T8
32W Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$800 $192
4 Student Restroom 6 INCAN A Lamp, Std 60W
with Manual Switching,
Occupancy Sensor
Replace with 6 FLUOR
CFL, Spiral 23 W
$180 $41
5 Classrooms Library
and Music
58 FLUOR (3) T8 4' F32T8
32W Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$1,600 $327
6 Corridor 100 FLUOR (3) T8 4' F32T8
32W Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$3,000 $591
7 Utility INCAN A Lamp, Std 60W with
Manual Switching
Replace with FLUOR CFL,
Spiral 23 W
$30 $4
8 Office 15 FLUOR (3) T8 4' F32T8
32W Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$450 $62
10 Office 2 FLUOR (4) T8 4' F32T8 32W
Standard (2) Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$150 $15
12 Exterior Lighting 13 HPS 150 Watt Magnetic
with Manual Switching
Replace with 13 LED 72W
Module StdElectronic
$7,800 $715
13 Exterior Lighting 3 HPS 150 Watt Magnetic with
Manual Switching
Replace with 3 LED 72W
Module StdElectronic
$1,800 $165
15 Classrooms Library
and Music
11 FLUOR [Unknown Lamp]
with Manual Switching
Add new Occupancy
Sensor
$200 $17
16 Exterior Lighting 3 HPS 100 Watt Magnetic with
Manual Switching
Replace with 3 LED 50W
Module StdElectronic
$1,500 $114
17 Exterior Lighting 9 HPS 100 Watt Magnetic with
Manual Switching
Replace with 9 LED 50W
Module StdElectronic
$4,500 $342
21 Office FLUOR [Unknown Lamp] with
Manual Switching
Add new Occupancy
Sensor
$150 $7
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
28 Exterior Lighting 14 HPS 400 Watt Magnetic
with Manual Switching
Replace with 14 LED
150W Module
StdElectronic
$28,000 $825
29 Kitchen Storage 2 FLUOR (2) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$150 $4
30 Exterior Lighting 2 HPS (4) 400 Watt (4)
Magnetic with Manual
Switching
Replace with 2 LED (4)
150W Module (4)
StdElectronic
$16,000 $471
32 Custodian/Storage INCAN A Lamp, Std 60W with
Manual Switching
Replace with FLUOR CFL,
Spiral 23 W and Add new
Occupancy Sensor
$180 $5
33 Custodian/Storage FLUOR (4) T8 4' F32T8 32W
Standard Program
StdElectronic with Manual
Switching
Add new Occupancy
Sensor
$150 $3
35 Exterior Lighting 6 HPS 400 Watt Magnetic with
Manual Switching
Replace with 6 LED 150W
Module StdElectronic
$12,000 $249
37 Class Restroom 2 FLUOR (2) CFL, Plug-in
26W Quad Tube StdElectronic
with Manual Switching
Add new Occupancy
Sensor
$300 $3
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
9 PMP-10 BELL & GOSSETT (3/4 HP)
with Manual Switching
Replace with New EC
Motor (3/4 HP)
$1,200 $254
14 S-4, S-5, S-6 and S-
7 Fan Motors
4 Baldor (3 HP) with Manual
Switching
Replace with 4 New
NEMA Premium Motors (3
HP)
$1,320 $191
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
22 S-2 Fan Baldor (0.5 HP) with Manual
Switching
Replace with New NEMA
Premium Motor (0.5 HP)
$320 $25
26 PMP-1 & PMP-2 2 US Electrical Motors (1.5 HP
x 2) with Manual Switching
Replace with 2 New
NEMA Premium Motors
(1.5 HP x 2)
$860 $49
27 PMP-3 & PMP-4 2 Marathon Electric (1 HP x 2)
with Manual Switching
Replace with 2 New
NEMA Premium Motors (1
HP x 2)
$540 $29
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
------------------------------------------
AkWarmCalc Ver 2.1.4.2, Energy Lib 2/2/2012
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix E
Energy Conservation Measures
Bayshore Elementary Portable Buildings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
The following tables consist of raw output data from the AkWarm Commercial program used to model
energy costs and calculate energy savings and financial ratios. These tables represent all of the energy
conservation measures calculated and considered by the energy audit team. However, ECMs included in
the Executive Summary and Section VIII are recommended by the energy audit team due to their viable
financial ratios (SIR>1) or due to their value added.
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback Thermostat:
Four Portable
Buildings
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Four Portable
Buildings space.
$2,650 $8,000 3.89 3
2 Lighting: Portable
Lighting
Replace with 12 FLUOR
(4) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor
$1,117 $10,400 1.57 9.3
3 Exterior Door:
Portable Building -
Doors
Remove existing door and
install standard pre-hung
U-0.16 insulated door,
including hardware.
$424 $4,919 1.65 11.6
4 Air Tightening Perform air sealing to
reduce air leakage by 30%.
$1,182 $8,000 1.24 6.8
5 Lighting: Portable
Lighting
Replace with 4 LED 50W
Module StdElectronic
$152 $2,000 1.11 13.1
6 Window/Skylight:
Portable Building -
Single Pane
Windows
Replace existing window
with U-0.30 vinyl window
$288 $4,433 0.95 15.4
7 Ceiling w/ Attic:
Portable Building -
Cold Roof
Add R-30 fiberglass batts
to attic with Standard
Truss.
$802 $16,666 0.92 20.8
8 Exposed Floor:
Portable Building -
Floor
Install R-14 rigid board
insulation
$481 $16,205 0.57 33.7
9 Above-Grade Wall:
Portable Building -
2x4 Stud Wall
Install R-20 rigid foam
board to exterior and cover
with T1-11 siding or
equivalent.
$1,844 $71,154 0.50 38.6
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
10 Window/Skylight:
Portable Building -
Double Pane
Windows
Replace existing window
with U-0.30 vinyl window
$130 $4,433 0.43 34.1
TOTAL $9,068 $146,210 0.92 16.1
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
2. Building Envelope
Insulation
Rank Location Existing Type/R-Value Recommendation Type/R-
Value
Installed
Cost
Annual
Energy
Savings
7 Ceiling w/ Attic:
Portable Building -
Cold Roof
Framing Type: Standard
Framing Spacing: 24 inches
Insulated Sheathing: None
Bottom Insulation Layer: R-19
Batt:FG or RW, 6 inches
Top Insulation Layer: None
Modeled R-Value: 21.1
Add R-30 fiberglass batts to
attic with Standard Truss.
$16,666 $802
8 Exposed Floor:
Portable Building -
Floor
Framing Type: 2 x Lumber
Insulating Sheathing: None
Top Insulation Layer: None
Bottom Insulation Layer: R-19
Batt:FG or RW, 6 inches
Modeled R-Value: 25.2
Install R-14 rigid board
insulation
$16,205 $481
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
9 Above-Grade Wall:
Portable Building -
2x4 Stud Wall
Wall Type: Single Stud
Siding Configuration: Just
Siding
Insul. Sheathing: None
Structural Wall: 2 x 4, 16
inches on center
R-11 Batt:FG or RW, 3.5
inches
Window and door headers: Not
Insulated
Modeled R-Value: 10.6
Install R-20 rigid foam
board to exterior and cover
with T1-11 siding or
equivalent.
$71,154 $1,844
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
3 Exterior Door:
Portable Building -
Doors
Door Type: Entrance, Metal,
fiberglass core; metal edge
Modeled R-Value: 1.7
Remove existing door and
install standard pre-hung U-
0.16 insulated door,
including hardware.
$4,919 $424
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
6 Window/Skylight:
Portable Building -
Single Pane
Windows
Glass: Single, Glass
Frame: Wood\Vinyl
Spacing Between Layers: Half
Inch
Gas Fill Type: Air
Modeled U-Value: 0.94
Solar Heat Gain Coefficient
including Window Coverings:
0.52
Replace existing window
with U-0.30 vinyl window
$4,433 $288
10 Window/Skylight:
Portable Building -
Double Pane
Windows
Glass: Double, glass
Frame: Wood\Vinyl
Spacing Between Layers:
Quarter Inch
Gas Fill Type: Air
Modeled U-Value: 0.56
Solar Heat Gain Coefficient
including Window Coverings:
0.46
Replace existing window
with U-0.30 vinyl window
$4,433 $130
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
4 Air Tightness estimated as: 0.90
cfm/ft2 of above-grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 30%.
$8,000 $1,182
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 Four Portable
Buildings
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Four Portable Buildings
space.
$8,000 $2,650
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
2 Portable Lighting 12 FLUOR (4) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching
Replace with 12 FLUOR
(4) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor
$10,400 $1,117
5 Portable Lighting 4 HPS 100 Watt Magnetic with
Manual Switching
Replace with 4 LED 50W
Module StdElectronic
$2,000 $152
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
------------------------------------------
AkWarmCalc Ver 2.1.4.2, Energy Lib 2/2/2012
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix F
Site Survey Photos
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
1. School, Main Entrance 2. School, North West Side
3. School, Classroom Entry Doors and
Windows 4. School, North West Gym Wall
5. School, Gym Entry Way 6. Boilers B-1 and B-2
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
7. Heated Glycol Circulation Pumps in Boiler
Room (PMP-1, 2, 3, 4, 12 and 13)
8. Heated Glycol Circulation Pumps in Boiler
Room (PMP-5, 6, 7 and 11)
9. Heat Exchanger in Boiler Room 10. Amtrol Boilermate Indirect Water Heater in
Boiler Room
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
11. Decommissioned Boilers in Gym Fan Room
12. Unused Combustion and Supply Air Vents
for Decommissioned Boilers in Gym Fan
Room
13. Heated Gylcol Circ Pumps in Gym Fan
Room (PMP-8 & 9)
14. PMP-10 for AHU-1 Heating Coil in Gym Fan
Room
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
15. AHU-1 in Gym Fan Room 16. S-1 Located in Room 33 Mechanical Loft
17. AHU-3 Located in Room 33 Mechanical Loft 18. S-2 Located in Room 33 Mechanical Loft
19. AHU-2 Located in Fan Room above Rm 12 20. S-5 Located in Pod 2. (Typical of S-4, S-6,
and S-7 in the other Pods)
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
21. School, Roof over MPR 22. Siemens Apogee DDC Controller (Typical in
Each Pod Fan Room)
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Appendix G
Thermographic Photos
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
Coffman Engineers made miscellaneous thermographic images of Inlet View Elementary School using a
FLIR T300 Infrared Camera. This is not a thermographic study, rather photographs to illustrate easy-to-
identify heat losses. The outdoor air temperature during the site visit was 28F.
1. Optical Image, Gym Entry. Thermal Image below is indicated by the white border.
2. Thermographic Image, Gym Entry. Temperatures indicated by color scale on right. Yellow
indicates heat leakage. Significant heat loss is being lost through entry way panels and metal
frame.
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
3. Optical Image, East Classroom Wall. 4. Thermographic Image, East Classroom Wall.
Heat loss occurring on upper wall around the
majority of the school.
5. Optical Image, North West Gym/MPR Wall. 6. Thermographic Image, North West
Gym/MPR Wall. Heat loss occurring
through upper wall and through unused
combustion air vents in Gym Fan Room.
7. Optical Image, Gym Fan Room Wall. 8. Thermographic Image, Gym Fan Room Wall.
Heat loss occurring through unused
combustion air and supply air vents for
decommissioned gym boilers.
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
9. Optical Image, Old Electrical Penetration in
Classroom Wall.
10. Thermographic Image, Old Electrical
Penetration in Classroom Wall. Heat loss
occurring through open wall penetration.
11. Optical Image, Gas Pipe Wall Penetration. 12. Thermographic Image, Gas Pipe Wall
Penetration. Heat loss occurring through wall
penetrations from existing and removed gas
lines.
13. Optical Image, South Gym Door. 14. Thermographic Image, South Gym Door.
Heat loss is occurring through poor weather-
stripping on door. This is typical for many
school exterior doors.
Bayshore Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/11/2012 AkWarm No. CIRI-ANC-CAEC-08
15. Optical Image, Portable Building. 16. Thermographic Image, Portable Building.
Heat loss through wall.
End of Report