HomeMy WebLinkAboutCIRI-ANC-CAEC Inlet View Elementary School 2012-EEENERGY AUDIT FINAL REPORT
Inlet View Elementary
1219 N Street
Anchorage, AK 99501
p (907) 742&7630
AkWarm ID No. CIRI&ANC&CAEC&10
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
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 i AkWarm No. CIRI&ANC&CAEC&10
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 ............................................................................................................................. 10
V.III ELECTRICAL DESCRIPTION .............................................................................................................................. 11
V.IV OUTBUILDINGS DESCRIPTION.......................................................................................................................... 11
VI. Historic Energy Consumption and Cost............................................................................. 13
VI.I ELECTRICAL CONSUMPTION DATA ................................................................................................................... 13
VI.II NATURAL GAS CONSUMPTION DATA .............................................................................................................. 13
VI.III OVERALL ENERGY CONSUMPTION DATA ....................................................................................................... 13
VII. Equipment Inventory and Photo Survey .......................................................................... 15
VIII. Energy Conservation Measures ....................................................................................... 16
VIII.I SCHOOL ENERGY CONSERVATION MEASURES ............................................................................................... 16
VIII.II OUTBUILDINGS ENERGY CONSERVATION MEASURES .................................................................................. 21
VIII.III ADMINISTRATIVE CONTROLS FOR ENERGY CONSERVATION AND OPTIMIZATION ....................................... 23
Appendices
Appendix A – Energy Benchmark Data
Appendix B – AkWarm Commercial Reports
Appendix C – Major Equipment List
Appendix D – Energy Conservation Measures – Inlet View 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
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 & Inlet View Elementary School location in Anchorage, Alaska – Google Maps .............................. 5
Fig. 4 & Inlet View Elementary School – Google Maps ................................................................................ 5
Fig. 5 & Inlet View Elementary Floor Plan .................................................................................................... 8
List of Tables
Table 1 & Recommended Energy Conservation Measures, Inlet View Elementary School .......................... 2
Table 2 & Recommended Energy Conservation Measures, Portable Building .............................................. 4
Table 3 & Building History, Inlet View Elementary School .......................................................................... 9
Table 4 & Supply Fan Summary .................................................................................................................. 10
Table 5 & Energy Cost and Consumption Data ........................................................................................... 13
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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
AkWarmC , the Alaska Retrofit Information System (ARIS), or other state and/or public information systems.
AkWarmC 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 Inlet View 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 6 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 $30,003
Natural Gas $30,341
Total $60,344
2009& 2010 Average Energy Utilization Index (EUI) = 109.9 kBtu/sf
2009& 2010 Average Cost Index = 1.66 $/sf
Fig. 2 6 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 6 Recommended Energy Conservation Measures, Inlet View Elementary School
Executive Summary – Recommended ECMs
Inlet View Elementary School (IVES)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
IVES&1a Refrigerator
s
Replace residential & light
commercial
refrigerators/freezers older
than 5 years old
& & & <10
IVES&2b Boiler Shut
Down
Shut down boilers B&1 and
B&2 during summer
months
$1,565 $800 32.03 0.5
IVES&3 Setback
Thermostat:
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the School
$2,111 $2,000 13.43 0.9
IVES&4 Above&
Grade Wall:
MPR Upper
South Wall
Add R&20 EIFS to exterior
of existing wall (85 sf)
$131 $1,311 2.22 10
IVES&5 Exterior
Door: South
and East
Entry Doors
Remove existing door and
install standard pre&hung
U&0.16 insulated door,
including hardware.
$111 $1,640 1.50 14.7
IVES&6 Mechanical
Fan Motors
Repair the fan motors in
AHU&1, F&1, F&2, and F&3
with New Premium
Efficiency Motors at time
of next motor replacement
$310 $1,900 1.42 6.1
IVES&7 Ventilation Add DDC control to place
North Wing restroom
exhaust fans on time
schedule.
$455 $4,000 1.41 8.8
IVES&8 Mechanical
Pumps
Replace Pumps P&5, P&7,
P&8, P&9 and P&10 with
new pumps with EC
motors at time of next
pump/motor replacement
$1,101 $7,950 1.20 7.2
IVES&9 b,c HVAC Replace boiler B&2 with
New Modulating High
Efficiency Gas Boiler.
Keep existing boiler B&1 as
back up.
$6,973 $100,000 1.12 14.4
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Executive Summary – Recommended ECMs
Inlet View Elementary School (IVES)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
IVES&10c HVAC And
DHW
Install Exhaust Stack
Economizer on existing
boilers B&1 and B&2
$1,246 $18,500 1.08 14.8
IVES&11 Lighting:
Surface
Mount HPS
and
Wallpack
Replace with 2 LED 25W
Module StdElectronic and
Replace with 4 LED 25W
Module StdElectronic
$327 $4,800 1.05 14.7
IVES&12 Air
Tightening
Perform air sealing to
reduce air leakage by 20%.
$1,088 $9,800 1.00 9
IVES&13 Lighting:
Classrooms,
Offices,
MPR,
Utility
Spaces
Replace or retrofit T12
fixtures with T8; install
occupancy sensors
$4,760 $64,850 1.04 13.6
IVES&14c Windows Replace existing window
with U&0.30 vinyl window
$1,884 $65,576 0.46 34.8
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.
b ECM item was modeled with separate AkWarm model and as a result, the item is not an additive measure and is
not included in the final totals.
c ECM&9 and ECM&10 are mutually exclusive and only one should be implemented. The ECMs are not intended to
be implemented concurrently. For example, if ECM&9 is chosen and new high efficiency boilers are installed, then
ECM&9 should not be completed because installing exhaust stack economizers is no longer applicable.
d This item is recommended as a maintenance improvement, even though the SIR<1. See Section VIII for details.
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Table 2 6 Recommended Energy Conservation Measures, Portable Building
Executive Summary – Recommended Energy Conservation Measures (ECMs)
Portable Building (PB)
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
PB&1 Setback
Thermostat:
Portable
Building
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Portable Building
space.
$597 $2,000 3.66 3.4
PB&2 Exterior
Door:
Portable
Building &
Doors
Remove existing door and
install standard pre&hung
U&0.16 insulated door,
including hardware.
$99 $1,230 1.66 12.5
PB&3 Air
Tightening
Perform air sealing to
reduce air leakage by 30%.
$261 $2,000 1.14 7.7
PB&4 Window/Sky
light:
Portable
Building &
Single Pane
Windows
Replace existing window
with U&0.22 vinyl window
$200 $2,958 1.04 14.8
PB&5 Ceiling w/
Attic:
Portable
Building &
Cold Roof
Add R&30 fiberglass batts
to attic with Standard
Truss.
$211 $4,340 1.01 20.6
PB&6 Lighting Replace T&12 lighting with
T&8 lighting and install
occupancy sensors
$152 $2,350 1.00 15.5
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II. Introduction
This energy audit was conducted at Inlet View Elementary School for AHFC and the Anchorage School
District. The school is a 36,300 square foot (sf) campus that includes a 33, 420 sf school and three on&site
portables with a combined area of 2,880 sf. 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 6 Inlet View Elementary School location in Anchorage, Alaska – Google Maps
Fig. 4 6 Inlet View 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,
and Air Conditioning (HVAC), 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 January 9, 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. Colin Hopkins 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. Colin Hopkins, (907) 742&7630 (office)
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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
Inlet View Elementary School is a small educational complex originally built in 1957, making it one of
the oldest schools in the Anchorage School District. Many of the building’s envelope components, such
as walls, windows and doors, are original and have insulating values significantly lower than current
insulation standards. The school has a north and south wing that are utilized for classroom space. The
Multi&Purpose Room (MPR), library and administration offices are located in the center of the school.
Fig. 5 6 Inlet View Elementary Floor Plan
The facility is operated from 7 a.m. until 4 p.m., five days a week during the school year. The school’s
MPR and library are also used after 4pm for school sports and community activities. The school year runs
from late August through late May. During the summer the school is typically unused, unless there is a
summer school program in session. There are approximately 230 students and 35 staff that occupy Inlet
View Elementary School.
Inlet View Elementary has gone through a several changes throughout its history; including additions,
interior renovations, exterior renovations, and re&roofing projects. A brief list of the major renovation
projects and years completed are shown below.
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Table 3 6 Building History, Inlet View Elementary School
Inlet View Elementary – Building History*
Date Addition or Renovation
1957 Original Construction. Design completed 1956.
1985 Addition of Classrooms 12 and 13
1990 Heating Improvements – New Boiler System
2008
Heating Improvements – Install new perimeter fin&tube heating systems in
affected classrooms to replace existing radiant floor heating systems. (Rooms 1&7,
9&11, 14&17, 22, and MPR)
2009 Lighting Upgrade
2010 Re&Roof of Entire School
*History is based on available drawings from ASD.
V.I School Architectural Description
The wall construction of Inlet View Elementary varies throughout the complex. Overall, the exterior walls
have insulation values ranging from R&7 to R&9, which is significantly lower than typical R&values used in
current construction and lower than current building code allows. The wall construction of the MPR is
original 1957 construction with 1x6 cedar siding, ½” plywood, 2” x 6” wood studs at 16” on¢er that
are partially filled with only 2” fiberglass batt insulation inside. The composite R&value of the MPR wall
assembly is R&8.7, as modeled in AkWarm. The wall construction of rooms 12 and 13 is original 1985
addition construction with 8” concrete block wall, 2”x2” wood furring with 2” rigid insulation, vapor
barrier and drywall. The composite R&value of this wall assembly is R&9.3, as modeled in AkWarm. The
rest of the school’s walls are original 1957 construction with 6” concrete block, 2”x2” wood furring with
2” blanket insulation, vapor barrier and drywall. There is approximately 13,751 sq ft of exterior wall area
in the school.
The floor construction of Inlet View Elementary is concrete slab on grade, with no under&floor insulation.
All of the floor perimeters of the school, except rooms 12 & 13, have 1” rigid insulation that extends 2’
down along the concrete foundation wall. The floor perimeter of rooms 12 & 13 have 2” rigid insulation,
extending 4’ down the foundation wall. The perimeter insulation throughout the school covers the edge of
the floor slab. There is 32,476 sf of slab on grade floor area and a total floor area of 33,420 sf. The slab on
grade floor area is less than the usable floor area of the building due to the school’s boiler room, which is
located underneath the kitchen.
The roof of Inlet View Elementary was replaced in 2010 with a new, fully adhered, exposed EPDM
roofing membrane with R&32 minimum insulation below the membrane. There is 32,476 sf of roof
envelope area. The roof area of the west entry way is not part of the heated building envelope and is
therefore not included in the AkWarm model.
There are two window types at the school: original wood frame windows and newer metal frame
windows. All of the windows on the north side of the school are original wood frame, double pane
windows with ¼” air space between the panes. Due to the age of these windows and significant air
infiltration through the frames, the composite insulation value of these windows was modeled as R&0.8.
There is 1,420 sq ft of original wood frame windows. The rest of the school has metal frame, double pane
windows with ½” air space between the panes. An estimated insulating value of R&1.2 was given to these
windows in the school. There is approximately 2,363 sq ft of metal frame window area.
In the north wing, the classrooms on the northern side originally had clerestories made from glass block.
These glass block clerestories have since been covered with siding on the exterior side. It is estimated that
the 282 sf of glass block has an R&value of R&5.0.
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There are two typical door types at the school: original solid wood doors and newer insulated metal doors.
The south and east entry ways both are original solid wood doors with single pane half&lite windows.
Both of these doors have significant infiltration occurring around the frame and were modeled to have an
insulation value of R&1.0. There are also two original R&2.6 solid wood man doors in the MPR. The rest of
the doors are insulated metal doors. The west entry door is an R&3.0 metal door with a double pane half&
lite window. There are three R&5.0 metal man doors located around the perimeter of the school. The total
door area of the school is 263 sq ft.
V.II Mechanical Description
Inlet View is heated with two identical Weil McLain, model 688, cast iron, sectional, gas&fired boilers.
Each boiler is rated at 1,703 MBH input and 1,358 MBH output. The boilers were installed in 1990 and
each are equipped with Gordon&Piatt Burners with Honeywell burner controllers. Duplex system pumps
P&7 & P&8 and P&9 & P&10, send heated water to perimeter baseboard heaters, radiant floors, cabinet unit
heaters and heating coils.
A State Select standard natural draft, gas&fired water heater with a 73 gal storage tank provides hot water
to the school. The domestic hot water is circulated by a Grundfos circulating pump (P&5). A complete list
of all major equipment is located in Appendix C.
Conditioned air is provided to the building using three supply air fans, F&1 through F&3, and with air
handling unit AHU&1. Each supply fan and AHU&1 are equipped with a hot water heating coil. The below
table describes the location, area served, and airflow of each supply fan.
Table 4 6 Supply Fan Summary
SUPPLY FAN SUMMARY
Fan
Name Fan Manufacturer Fan Location Area
Served CFM
F&1 Trane Fan Room 21 North Wing 10,000
F&2 Trane Fan Room 21 South Wing 8,000
F&3 Trane Fan Room 21 MPR 5,200
AHU&1 Trane Fan Room 21 Library 3,905
Supply fans F&1 through F&3 supply air to the majority of the building. In each classroom relief air is
exhausted by a dedicated relief air fan; there are 12 total relief air fans in the building. Return air is vented
into the two large school hallways, which act as the return air plenums. Return air is brought through the
hallways and into the fan room housing F&1, F&2, and F&3, where it is mixed with outside air and filtered
before being re&circulated. The supply fans and relief fans operate continuously while the building is in
occupied mode and are off during unoccupied mode. It was reported that while the relief fans were off
during unoccupied mode, the dampers of the relief air fans do not close properly, allowing significant
cold air to drop into the classrooms. Restrooms are exhausted with rooftop exhaust fans, which were
reported to be running continuously year round.
The school’s building energy management and control system is a mixture of older pneumatic controls
and newer direct digital controls (DDC). The hybrid system uses electronic transducers to control
pneumatic actuators. The pneumatic controls are operated by an air compressor utilizing a 1.5 HP motor.
The system has been well maintained and appeared to be in good working order during the site visit.
Pneumatic systems, however, are considered outdated due to the vast improvements in monitoring,
control and operating efficiencies available from the modern genre of electronic control systems. A
Siemens Apogee DDC control system is utilized to operate the boiler, heating water pumps, and supply
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fans. There is a night&set back controlled by the DDC system that lowers building temperatures to 65F
during unoccupied mode.
V.III Electrical Description
Inlet View Elementary School is served by an 800A, 120/208V, 3&phase, 4&wire, underground service.
The school does not have a generator.
Typical classrooms are illuminated by a mixture of surface mounted wraparound, suspended wraparound,
surface mounted parabolic, light fixtures equipped with two or three lamp 40 watt (W) T&12 fluorescent
lamps. The fixtures were originally equipped with magnetic ballasts and approximately one third have
been replaced with electronic ballasts, as the magnetic ballasts have failed. Typical classroom lighting
control is three manual switches, controlling three zones in the classroom. The zones run perpendicular to
the corridors and are separated by exposed beams. Some classrooms have bi&level lighting control. All
classrooms have access to natural light. The typical classroom has one entire wall of windows.
Classrooms on the north side of the building also have a 4' clearstory built of glass block, but it has been
covered in sheathing. Lighting levels in the classrooms are typically below with current Illumination
Engineering Society of North America (IESNA) illumination and ASD standards. Measured levels ranged
from 15&25 foot&candles. The target levels listed in those standards are 30&50 foot&candles.
Corridor lighting was upgraded in 2009. It consists of two&lamp T8 fixtures with electronic ballasts
controlled by a central contactor, connected to the security system. Corridor lighting levels averaged 25
foot&candles, the recommended level.
The multipurpose room lighting was replaced in 2009. It is illuminated by four lamp T5HO light fixtures
controlled by manual switches. Lighting levels averaged 25 foot&candles.
All offices, storage areas, utility rooms, are illuminated by two or four lamp T12 fixtures. The fixtures
were originally equipped with magnetic ballasts and approximately one third have been replaced with
electronic ballasts, as the magnetic ballasts have failed. Lighting levels were generally adequate.
Exterior light fixtures all utilize high pressure sodium (HPS) sources. There are (5) 400W HPS pole
mounted "shoebox" type area lighters illuminating the parking lot and driveway. There are (6) 400W HPS
pole mounted flood lights illuminating the skating rink. There are (2) 100W HPS canopy lights over the
entrances. There are (4) 100W HPS wallpacks and (2) 250W HPS wall mounted flood lights around the
perimeter of the building. All exterior lighting is controlled by contactors located in the main electrical
room based on signals from a central photocell and the security system. Parking lot lights are shut&off
when the security system is armed.
Other electricity&using equipment not previously described in the mechanical or electrical sections include
a commercial reach&in freezer, a commercial reach&in refrigerator, a microwave and other kitchen
equipment, and various user equipment such as projectors, computers, printers, and a laminator (which is
turned off when not in use).
V.IV Outbuildings Description
There are three portables at Inlet View Elementary that are used for school and after school activities.
Two of the portables are used for classrooms and the remaining portable is used for before and after
school programs and for band. On average, the portables are used approximately 40 hours per week. The
portables use electricity for heating, lighting and other plug loads. Due to the fact that the three on&site
portables have similar building envelope construction and heating equipment, only one AkWarm model
was created to model the average characteristics of all three portables. The results and recommended
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ECMs generated by this single portable AkWarm model should be applied to all of the three portable
buildings.
Each portable has 2”x4” wood stud wall construction at 16” on¢er with R&11 fiberglass batt insulation
in between the studs. The exterior face of the wall is T1&11 siding with drywall on the interior side of the
wall. Interior and exterior wall height is 9’ under the roof eaves, and the end&walls vary in height from 9’
at the eaves to 11’ at the roof peak in the center of the end wall. One portable typically has 1,170 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 2”x8” 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 990 sf of roof area.
The windows of the portables include both single pane (R&1.1) and double pane (R&1.8) wood windows.
There are typically two metal doors per portable, with estimated insulation values of R&1.7.
All three portables are heated with electric resistance perimeter baseboards and electric unit heaters. The
electric baseboard temperature set point is controlled by a dial thermostat on each individual baseboard.
This makes it easy for the electric baseboards to be left on at higher temperatures than is required. 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.
The lighting in the portables is typically 2 lamp and 4 lamp, 4ft long, T&12 light fixtures with magnetic
ballasts. There are three 2 lamp fixtures and twelve 4 lamp fixtures. Both of these fixtures are candidates
for replacement with newer energy efficient T&8 light fixtures.
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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. Municipal Light and Power
(ML&P) 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 5 6 Energy Cost and Consumption Data
Energy Cost and Consumption Data
2009 2010 Average
Electric $0.13/kWh $0.13 /kWh $0.13 /kWh
Natural Gas $1.01 /CCF $0.90 /CCF $0.96 /CCF
Total Cost $63,041 $57,647 $60,344
ECI $1.74 /sf $1.59 /sf $1.66 /sf
Electric EUI 23.2 kBtu/sf 21.7 kBtu/sf 22.4 kBtu/sf
Natural Gas EUI 87.5 kBtu/sf 87.4 kBtu/sf 87.4 kBtu/sf
Building EUI 110.6 kBtu/sf 109.1 kBtu/sf 109.9 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 36,300 sf, which includes 33,420 sf of the
school and 2,880 sf of portables.
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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# IVES61 6 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# IVES62 – Shutdown Boilers During Summer Months
Annual Energy Savings Installed Cost SIR Payback (years)
$1,565 $800 32.03 0.5
The school’s two gas&fired boilers operate year&round, even during the summer when limited heating
needs are required. By turning off the boilers from early June to the end of August, energy savings can be
achieved. ASD has had trouble with older generation grooved joint couplings when subjected to cyclic
heating and cooling from seasonal shutdowns. However, it appears that Inlet View Elementary does not
contain grooved&joint couplings and leaks should not be an issue when boilers are shut down seasonally.
Inlet View Elementary also has a standalone gas&fired domestic hot water heater, allowing domestic hot
water to be produced while the two Weil&McLain boilers are shut down. The cost for this ECM is for the
labor required to complete the annual shutdown. This ECM was modeled with a separate AkWarm model
and as a result the item is not an additive measure in AkWarm. It is therefore not included in the final
cost savings total in the final AkWarm model in the Appendix D.
ECM# IVES63 – Setback Thermostat in All Building Spaces
Annual Energy Savings Installed Cost SIR Payback (years)
$2,111 $2,000 13.43 0.9
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 that other DDC setpoints be changed, such as the low&temp alarm. This ECM
is a compilation of items 1 and 3 in Appendix D, which are intended to be implemented concurrently.
Details of the individual items are shown in Appendix D.
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ECM # IVES64 –Insulate Wall Area on South Face of MPR
Annual Energy Savings Installed Cost SIR Payback (years)
$131 $1,311 2.22 10
The south facing exterior wall of the MPR extends above the roofline of the rest of the school. This wall
used to have south clerestory windows that allowed natural light to enter the MPR. Currently, these
windows have been replaced with a corrugated plastic wall which is estimated to have an R&value of R&1.
The corrugated plastic wall area is 85 sf. Insulating this wall area with an R&20 Exterior Insulation Finish
System (EIFS) will reduce heat loss and save approximately $131 in natural gas annually. Details of the
ECM are shown in item 4 in Appendix D.
ECM # IVES65 – Replace South and East Entry Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$111 $1,640 1.50 14.7
The south and east entry doors are original solid wood doors. It was reported that the doors do not close
properly during the winter and contribute to significant air leakage. It is recommended that these doors be
replaced with new insulated entry doors (U&0.16). New weather&stripping should be installed on the new
door during replacement. Details of the ECM are shown in item 5 in Appendix D.
ECM # IVES66 – Repair Motors with NEMA premium efficiency motors
Annual Energy Savings Installed Cost SIR Payback (years)
$310 $1,900 1.42 6.1
Replacing fan motors for AHU&1, F&1, F&2 and F&3 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 pump motor over the standard
efficiency motor replacement is only a $1,900 repair cost. This ECM is a compilation of items 6, 7, 9 and
10 as modeled in AkWarm and are intended to be implemented concurrently. Details of the individual
items are shown in Appendix D.
ECM # IVES67 – Add DDC Control to North Wing Restroom Exhaust Fans
Annual Energy Savings Installed Cost SIR Payback (years)
$455 $4,000 1.41 8.8
Currently, the restroom exhaust fans for the north wing restrooms run constantly. Automatically shutting
the fans down when the building is in unoccupied mode will save electricity and reduce the amount of
cold air infiltrating the school. It is recommended that the fans be controlled by the DDC system so that
the fans can be automatically scheduled. Details of the ECM are shown in item 8 in Appendix D.
ECM # IVES68 – Repair Burnout Motors with EC motors
Annual Energy Savings Installed Cost SIR Payback (years)
$1,101 $7,950 1.20 7.2
Replacing pumps P&7, P&8, P&9, P&10 and domestic hot water pump P&5 with new electronically
commutated motors will save significant amounts of electricity. New, high efficiency pumps with
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electronically commutated (EC) motors have integral speed controls which read system demand, allowing
the pump to slow down with significant electrical savings. EC motors also do not require DDC
connectivity. Replacing the existing pumps with new pumps with EC motors now (while the existing
motors are still functional) will result in a high replacement cost. However, upgrading to pumps with EC
motors when the existing pumps fail and are in need of repair will offer a much better payback. The
marginal cost of choosing a high efficiency EC motor over the standard efficiency replacement motor for
the above pumps is only a $7,950 repair cost, since the motor needs to be replaced anyway. This ECM is
a compilation of items 2, 12, and 17 as modeled in AkWarm which are intended to be implemented
concurrently. Details of the individual items are shown in Appendix D.
ECM # IVES69 – Replace Boiler B62 with New High Efficiency Boiler
Annual Energy Savings Installed Cost SIR Payback (years)
$6,973 $100,000 1.12 14.4
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 not be replaced and would be kept as the back&up boiler.
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. Replacing the existing boiler
with a new high efficiency boiler (92% average combustion efficiency and high turn&down ratio) at a cost
of $100,000 will give an SIR of 1.12, and an annual savings of $6,973. This ECM was modeled with a
separate AkWarm model and as a result the item is not an additive measure in AkWarm. It is therefore
not included in the final cost savings total in the final AkWarm model in the Appendix D.
Note: ECM9 and ECM10 are mutually exclusive and only one should be implemented. The ECMs are
not intended to be implemented concurrently. For example, if ECM9 is chosen and new high efficiency
boilers are installed, then ECM9 should not be completed because installing exhaust stack economizers
is no longer applicable.
ECM # IVES610 – Install Exhaust Stack Economizer
Annual Energy Savings Installed Cost SIR Payback (years)
$1,246 $18,500 1.08 14.8
Installing one exhaust stack economizer on the combined exhaust stack of the two existing gas&fired
boilers will recover heat from exhaust gases. An exhaust stack economizer utilizes a fan and heat
exchanger to transfer heat from exhaust gases to the hydronic system, increasing the efficiency of the
heating system by approximately 5% or more. A single exhaust stack economizer can recover heat from
either boiler as long as it is installed within the boiler’s combined exhaust stack. Details of the ECM are
shown in item 14 in Appendix D.
Note: ECM9 and ECM10 are mutually exclusive and only one should be implemented. The ECMs are
not intended to be implemented concurrently. For example, if ECM9 is chosen and new high efficiency
boilers are installed, then ECM9 should not be completed because installing exhaust stack economizers
is no longer applicable.
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ECM # IVES611 – Upgrade Building Mounted Exterior Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$327 $4,800 1.05 14.7
The building mounted exterior HPS lighting at the school consists of two 100W HPS canopy fixtures and
four 100W wallpacks. This ECM would replace the 100W lamps with 25W LED fixtures. It is assumed
that the wiring can be reused. This measure is modeled as items 15 & 16 in Appendix D. See appendix D
for more information.
ECM # IVES612 – Perform Air Sealing to Reduce Air Leakage by 20%
Annual Energy Savings Installed Cost SIR Payback (years)
$1,088 $9,800 1.00 9
Unconditioned infiltration air, leaking through doors, windows, and other building envelope penetrations
contributes to the heating required in the building. Methods to decrease the 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, $9,800 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 significant infiltration problems:
· There are 12 classroom relief air fans and one kitchen exhaust fan that were reported to have
dampers that do not close properly when the fans are not running. It is recommended that the
dampers for these fans be replaced with new insulated, thermally broken dampers that seal air
tight when in the closed position.
· There are two existing coal dump hatches that were utilized in the past to move coal from the
loading dock to the coal storage area, adjacent to the below&grade boiler room. These now un&
used coal hatches are not well sealed and allow cold air to seep into the building envelope. It is
recommended that these un&used coal hatches be sealed and insulated.
· Air seal around existing windows and install new weather&stripping on exterior doors.
ECM # IVES613 – Replace or Retrofit T12 Fluorescent Light Fixtures, Install Occupancy Sensors
Annual Energy Savings Installed Cost SIR Payback (years)
$4,760 $64,850 1.04 15.0
This measure would replace all remaining T12 light fixtures in the school, except for the light fixtures in
the MPR stage area, with more efficient T8 sources and install occupancy sensors in all classrooms and
restrooms.
Previous energy conservation projects executed at this school upgraded T12 light fixtures in corridors and
to T8 sources. Elimination of all T12 lamps will simplify maintenance. This measure would replace the
remaining T12 light fixtures in the classrooms, offices, storage spaces, and utility spaces. It includes the
following: replacing (171) 3&lamp, T12 fixtures in classrooms (which are currently under illuminated) one
for one with 3&lamp T8 fixtures; replacing (113) 2&lamp, T12 fixtures in the classrooms (which are
currently under illuminated) one for one with 3&lamp T8 fixtures; retrofitting (27) 2&lamp, 2'x2' U&tube
T12 fixtures in the classrooms with three 17W, 2' T8 lamps; replacing (13) 2&lamp, T12 fixtures in the
restrooms one for one with 2&lamp T8 fixtures; replacing (34) 4&lamp, T12 fixtures in the offices one for
one with 3&lamp T8 fixtures; retrofitting (4) 4&lamp, T12 fixtures in mechanical spaces with (4) T8 lamps;
retrofitting (2) 1&lamp, T12 fixtures in mechanical spaces with (1) T8 lamp; retrofitting (18) 2&lamp, and
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T12 fixtures in mechanical spaces with (2) T8 lamps; removing (2) 4&lamp T12 fixtures with emergency
ballasts in the MPR and replacing them with (2) "bug&eye" emergency lighting units. This measure would
also include the installation of approximately (49) occupancy sensors in classrooms and restrooms.
This measure is an aggregate of multiple items are modeled in AkWarm separately, but are intended to be
implemented concurrently. This measure includes individual items that have an SIR of less than one, but
has a combined SIR of greater than one. This measure increases lighting levels in all areas identified as
deficient to recommended levels. This measure excludes (10) T12 light fixtures in the stage area of the
multipurpose room. It is not occupied often enough to payback based solely on energy savings. However,
it is recommended that this space also be upgraded to T8 to simplify maintenance.
This measure is modeled as items 11, 13, 20, 21, 22, 23, 24, 25, 31 and 32 in Appendix D. See Appendix
D for more information.
ECM # IVES614 – Replace North Facing Original Wood Windows
Annual Energy Savings Installed Cost SIR Payback (years)
$1,884 $65,576 0.46 34.8
The windows on the north face of the school building have wood frames and were installed during
original construction. Aging wood frame windows often have poor insulating values and are a source of
significant air leakage. Increased maintenance costs are also present with aging windows as the seals wear
and moisture causes them to warp, crack, or stick. Due to the high cost of replacement windows, the
payback for this ECM is long. However, replacement windows with energy efficient thermal&panes (U&
0.30) will offer significant energy savings and reduce maintenance costs. See item 28 in Appendix D for
more information.
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VIII.II Outbuildings Energy Conservation Measures
There are three portable buildings that exist on&site and are connected to the electrical service of Inlet
View Elementary School. A typical AkWarm model was created to model the typical portable, due to
similarities in construction type and heating systems. The following ECM savings and installed costs
are for one portable building. Multiply the results by three to obtain savings and costs for all three
portables combined.
ECM #PB61 – Setback Thermostat
Annual Energy Savings Installed Cost SIR Payback (years)
$597 $2,000 3.66 3.4
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. Details of the individual ECM are
shown in item 1 in Appendix E.
ECM #PB62 – Replace Exterior Doors
Annual Energy Savings Installed Cost SIR Payback (years)
$99 $1,230 1.66 12.5
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. Details of the individual ECM
are shown in item 2 in Appendix E.
ECM #PB63– Seal Building Envelope and Reduce Infiltration by 30%
Annual Energy Savings Installed Cost SIR Payback (years)
$261 $2,000 1.14 7.7
By tightening the building envelope with air sealing improvements, infiltration into the building will be
reduced. This in turn will reduce the heating load required by the building and reduce the amount of
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. To achieve a viable economic benefit, $2,000 can be
invested and still achieve an SIR > 1 by reducing air leakage by 30%. Details of the individual ECM are
shown in item 3 in Appendix E.
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ECM # PB64 – Replace Single Pane Original Wood Windows
Annual Energy Savings Installed Cost SIR Payback (years)
$200 $2,958 1.04 14.8
Some of the portable windows are single pane, wood frame windows, which have poor insulating values
and significant air leakage through the wood frames. Replacing these windows with a U&0.22 window
will reduce electricity required to heat the building. Details of the individual ECM are shown in item 5 in
Appendix E.
ECM #PB65 – Add Roof Insulation to Cold Roof
Annual Energy Savings Installed Cost SIR Payback (years)
$211 $4,340 1.01 20.6
Adding additional R&19 fiberglass batt insulation to the roof of the portables to make an R&38 roof is
recommended. This can be accomplished by accessing the attic space in the portable’s cold roof.
Installing an additional layer of R&19 insulation will reduce the amount of electricity used for heating the
building. Details of the individual ECM are shown in item 6 in Appendix E.
ECM # PB 66 – Replace T612 Lighting with New T68 Lighting
Annual Energy Savings Installed Cost SIR Payback (years)
$152 $2,350 1.00 15.5
The lighting in the portables is 2 lamp and 4 lamp, 4ft long, T&12 light fixtures with magnetic ballasts.
Replacing the existing lighting to T&8 fixtures with occupancy sensors and programmable start ballasts is
recommended. Completing this lighting retrofit will save $152 annually and have an SIR of 1.00.
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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.
Inlet View Elementary Final Energy Audit Report
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Appendix A
Energy Benchmark Data
First Name Last Name Middle Name Phone
Steven Golab 348-5132
State Zip
AK 99517
Monday-
Friday
Saturday Sunday Holidays
8-4:30
Average # of
Occupants
During
236
Renovations
Date
REAL Preliminary Benchmark Data Form
PART I – FACILITY INFORMATION
Facility Owner
MOA
Building Name/ Identifier Building Usage Building Square Footage
Date
Municipal Government/Subdivision
Facility Owned By
Anchorage School District
07/22/11
1957 27387 SF Original Structure
36,300
Year Built
Facility Address
Building Type
Mixed
Community Population
Facility City
1957
Inlet View Elementary Education - K - 12
Facility Zip
Golab_Steven@asdk12.org
1219 N St Anchorage
Primary
Operating
Hours
Contact Person
City
261,500
99517
Email
Anchorage
Details
Mailing Address
PART II – ENERGY SOURCES
Heating Oil Electricity Natural Gas Propane Wood Coal
$ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton
Other energy
sources?
Describe
1972 1900 SF IMC
1957 27387 SF Original Structure
2. Provide utilities bills for the most recent two-year period for each energy source you use.
1985 3133 SF Classrooms
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.
Total =
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Inlet View Elementary
Buiding Size Input (sf) =36,300
2009 Natural Gas Consumption (Therms)31,748.00
2009 Natural Gas Cost ($)32,014
2009 Electric Consumption (kWh)246,241
2009 Electric Cost ($)31,027
2009 Total Energy Use (kBtu)4,015,221
2009 Total Energy Cost ($)63,041
Annual Energy Use Intensity (EUI)
2009 Natural Gas (kBtu/sf) 87.5
2009 Electricity (kBtu/sf)23.2
2009 Energy Utilization Index (kBtu/sf)110.6
Annual Energy Cost Index (ECI)
2009 Natural Gas Cost Index ($/sf)0.88
2009 Electric Cost Index ($/sf)0.85
2009 Energy Cost Index ($/sf)1.74
2010 Natural Gas Consumption (Therms)31,714.00
2010 Natural Gas Cost ($)28,668
2010 Electric Consumption (kWh)231,2972010 Electric Consumption (kWh)231,297
2010 Electric Cost ($)28,979
2010 Total Energy Use (kBtu)3,960,817
2010 Total Energy Cost ($)57,647
Annual Energy Use Intensity (EUI)
2010 Natural Gas (kBtu/sf)87.4
2010 Electricity (kBtu/sf)21.7
2010 Energy Utilization Index (kBtu/sf)109.1
Annual Energy Cost Index (ECI)
2010 Natural Gas Cost Index ($/sf)0.79
2010 Electric Cost Index ($/sf)0.80
20010 Energy Cost Index ($/sf)1.59
Note:
1 kWh = 3,413 Btu's
1 Therm = 100,000 Btu's
1 CF ≈ 1,000 Btu's
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Inlet View 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 NGC304 Jan-09 01/09/09 02/10/09324,5114,511$4,584$1.02Enstar NGC304 Feb-09 02/10/09 03/09/09273,6693,669$3,740$1.02Enstar NGC304 Mar-09 03/09/09 04/09/09313,3323,332$3,406$1.02Enstar NGC304 Apr-09 04/09/09 05/08/09292,3122,312$2,382$1.03Enstar NGC304/329 May-09 05/08/09 06/10/09331,5851,585$1,651$1.04Enstar NGC329 Jun-09 06/10/09 07/10/09301,2121,212$1,278$1.05Enstar NGC329 Jul-09 07/10/09 08/11/09321,1331,133$1,200$1.06Enstar NGC329 Aug-09 08/11/09 09/11/09311,1981,198$1,265$1.06Enstar NGC329 Sep-09 09/11/09 10/12/09311,6231,623$1,690$1.04Enstar NGC329 Oct-09 10/12/09 11/09/09282,4992,499$2,575$1.03Enstar NGC329 Nov-09 11/09/09 12/08/09294,1004,100$4,179$1.02Enstar NGC329 Dec-09 12/08/09 01/11/10344,5744,574$4,064$0.89Enstar NGC329 Jan-10 01/11/10 02/10/10304,4164,416$3,717$0.84Enstar NGC329 Feb-10 02/10/10 03/10/10283,4243,424$2,896$0.85Enstar NGC329 Mar-10 03/10/10 04/12/10333,2943,294$2,807$0.85Enstar NGC329 Apr-10 04/12/10 05/10/10282,5412,541$2,190$0.86Enstar NGC329 May-10 05/10/10 06/08/10291,6041,604$1,713$1.07Enstar NGC329Jun-1006/08/1007/09/1031336336$348$1.04Enstar NGC329Jun-1006/08/1007/09/1031336336$348$1.04Enstar NGC329 Jul-10 07/09/10 08/10/10 32 758758$875$1.15Enstar NGC329 Aug-10 08/10/10 09/09/10301,5381,538$1,596$1.04Enstar NGC329 Sep-10 09/09/10 10/11/10322,2162,216$2,118$0.96Enstar NGC329 Oct-10 10/11/10 11/08/10282,8822,882$2,688$0.93Enstar NGC329 Nov-10 11/08/10 12/08/10303,7713,771$3,385$0.90Enstar NGC329 Dec-10 12/08/10 01/11/11344,9344,934$4,335$0.88Jan - 09 to Dec - 09 total:31,74831,7480.00$32,014$0Jan - 10 to Dec - 10 total:31,71431,7140.00$28,668$0$1.01$0.90Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
$2,000 $2,500 $3,000 $3,500 $4,000 $4,500 $5,000 2,0003,0004,0005,0006,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Inlet View Elementary - Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($)$0 $500 $1,000 $1,500 01,000Jan-09 Mar-09 May-09 Jul-09 Sep-09 Nov-09 Jan-10 Mar-10 May-10 Jul-10 Sep-10 Nov-10Natural Gas Consumption (Therms)Date (Mon - Yr)Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Inlet View ElementaryElectricityBtus/kWh =3,413Provider Customer # Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)ML&P 23775997 Jan-09 1/8/2009 2/9/20093226,52490580.64$2,640$0.10$955.58ML&P 23775997 Feb-09 2/9/2009 3/9/20092823,26079474.00$4,912$0.21$876.90ML&P 23775997 Mar-09 3/9/2009 4/8/20093023,64580774.24$2,571$0.11$879.74ML&P 23775997 Apr-09 4/8/2009 5/8/20093021,90974868.00$2,454$0.11$805.80ML&P 23775997 May-09 5/8/2009 6/8/20093117,85260969.44$2,069$0.12$822.86ML&P 23775997 Jun-09 6/8/2009 7/9/20093110,94737464.50$1,539$0.14$764.47ML&P 23775997 Jul-09 7/9/2009 8/10/20093211,12438064.50$1,737$0.16$764.47ML&P 23775997 Aug-09 8/10/2009 9/9/20093016,68056965.60$2,218$0.13$777.36ML&P 23775997 Sep-09 9/9/2009 10/8/20092920,35069572.30$2,465$0.12$856.99ML&P 23775997 Oct-09 10/8/2009 11/9/20093223,07278777.76$2,815$0.12$921.46ML&P 23775997 Nov-09 11/9/2009 12/8/20092925,35586580.80$2,955$0.12$957.48ML&P 23775997 Dec-09 12/8/2009 1/7/20103025,52387183.20$2,652$0.10$985.92ML&P 23775997 Jan-10 1/7/2010 2/5/20102926,87191777.20$2,686$0.10$914.82ML&P 23775997 Feb-10 2/5/2010 3/9/20103222,82877975.52$2,660$0.12$894.91ML&P 23775997 Mar-10 3/9/2010 4/8/20103023,92081676.64$2,907$0.12$908.18ML&P 23775997 Apr-10 4/8/2010 5/7/20102921,85974676.40$2,734$0.13$905.34ML&P 23775997 May-10 5/7/2010 6/8/20103217,08158366.56$2,282$0.13$820.68ML&P23775997Jun-106/8/20107/8/2010309,18331366.56$1,416$0.15$820.68ML&P23775997Jun-106/8/20107/8/2010309,18331366.56$1,416$0.15$820.68ML&P 23775997 Jul-10 7/8/2010 8/9/20103210,10034566.56$1,750$0.17$820.68ML&P 23775997 Aug-10 8/9/2010 9/8/20103016,30055666.56$2,235$0.14$820.68ML&P 23775997 Sep-10 9/8/2010 10/7/20102919,32365966.56$2,390$0.12$820.68ML&P 23775997 Oct-10 10/7/2010 11/5/20102920,45869866.56$2,384$0.12$820.68ML&P 23775997 Nov-10 11/5/2010 12/7/20103220,67270669.92$2,671$0.13$862.11ML&P 23775997 Dec-10 12/7/2009 1/7/2009-33422,70277567.52$2,864$0.13$832.52Jan - 09 to Dec - 09 total:246,2418,404874.98$31,027$10,369Jan - 10 to Dec - 10 total:231,2977,894842.56$28,979$10,242$0.13$0.13Jan - 09 to Dec - 09 avg:Jan - 10 to Dec - 10 avg:Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
$2,000$3,000$4,000$5,000$6,00010,00015,00020,00025,00030,000Electric Cost ($)Electric Consumption (kWh)Inlet View Elementary - Electric Consumption (kWh) vs. Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)$0$1,00005,000Jan-09Mar-09May-09Jul-09Sep-09Nov-09Jan-10Mar-10May-10Jul-10Sep-10Nov-10Date (Mon - Yr)Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Appendix B
AkWarm Commercial Reports
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Inlet View Elementary
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 6/12/2012 3:54 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Inlet View ES Auditor Company: Coffman Engineers
Address: 1219 N Street Auditor Name: Walter Heins, PE
City: Anchorage Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Steven Golab
Client Address: Auditor Phone: (907) 276&6664
Auditor FAX: (907) 276&5042
Client Phone: (907) 348&5132 Auditor Comment:
Client FAX:
Design Data
Building Area: 33,420 square feet Design Heating Load: Design Loss at Space: 1,102,031
Btu/hour with Distribution Losses: 1,102,031 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 1,679,925 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 0 people Design Indoor Temperature: 72 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: Anchorage ML&P & Commercial & Sm Natural Gas Provider: Enstar Natural Gas & Commercial &
Sm
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.960/ccf
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building $28,942 $0 $2,724 $14,559 $0 $19,838 $0 $0 $513 $0 $66,576 With Proposed Retrofits $22,991 $0 $2,673 $7,862 $0 $18,024 $0 $0 $159 $0 $51,709 SAVINGS $5,951 $0 $51 $6,696 $0 $1,814 $0 $0 $354 $0 $14,867
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary $0 $2,000 $4,000 $6,000 $8,000 $10,000 $12,000 $14,000FloorWall/DoorWindowCeilingAirExistingRetrofitAnnual Space Heating Cost by Component
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Annual Modeled Consumption (Blue) compared to Actual Electric (Left) and Natural Gas (Right) Consumption (Orange).
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Monthly Modeled Consumption (Blue) compared to Actual Electric Consumption (Orange).
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Inlet View Elementary Monthly Modeled Consumption (Blue compared to Actual Natural Gas Consumption (Orange) .
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Portable Buildings
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 2/17/2012 2:43 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: Inlet View Elementary & Portable Building Auditor Company: Coffman Engineers, Inc.
Address: 1219 N st. Auditor Name: Walter Heins, PE
City: Anchorage Auditor Address: 800 F Street
Anchorage, AK 99501 Client Name: Steven Golab
Client Address: Auditor Phone: (907) 276&6664
Auditor FAX: (907) 276&5042
Client Phone: (907) 348&5132 Auditor Comment:
Client FAX:
Design Data
Building Area: 960 square feet Design Heating Load: Design Loss at Space: 24,472
Btu/hour
with Distribution Losses: 24,472 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and
25% Safety Margin: 37,308 Btu/hour
Note: Additional Capacity should be added for DHW load,
if served.
Typical Occupancy: 0 people Design Indoor Temperature: 68 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: Anchorage ML&P & Commercial & Sm Natural Gas Provider: Enstar Natural Gas& Residential
Average Annual Cost/kWh: $0.130/kWh Average Annual Cost/ccf: $0.000/ccf
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigeration Other Electrical Cooking Clothes Drying Ventilation Fans Service Fees Total Cost Existing Building $2,884 $0 $0 $759 $0 $41 $0 $0 $0 $0 $3,684 With Proposed Retrofits $1,403 $0 $0 $154 $0 $41 $0 $0 $0 $0 $1,598 SAVINGS $1,481 $0 $0 $606 $0 $0 $0 $0 $0 $0 $2,087
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings $0$1,000$2,000$3,000$4,000Existing RetrofitSpace HeatingOther ElectricalLightingAnnual Energy Costs by End Use
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 Portable Buildings
Inlet View Elementary Final Energy Audit Report
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Appendix C
Major Equipment List
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 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 WEIL&MCLAIN 688 CAST IRON GAS&FIRED 1,703 MBH INPUT 1,358 MBH OUTPUT ≈ 79% ¾ HP 30 8 B&2 BOILER RM BUILDING HEATING WEIL&MCLAIN 688 CAST IRON GAS&FIRED 1,703 MBH INPUT 1,358 MBH OUTPUT ≈ 79% ¾ HP 30 8 WH&1 BOILER RM DOMESTIC HOT WATER HEATER STATE SELECT PR675NRRS GAS&FIRED STANDARD UPDRAFT 75 MBH INPUT 73 GAL 48% ENERGY FACTOR & 15 7 P&5 BOILER RM DHW PUMP GRUNDFOS UP 25&64SF INLINE & NEMA STANDARD 180W 10 2 P&7 BOILER RM SOUTH HEATING WATER CIRC ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 104 GPM 40’ 81.5% 2 HP 10 0 P&8 BOILER RM SOUTH HEATING WATER CIRC DUPLEX ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 104 GPM 40’ 81.5% 2 HP 10 0 P&9 BOILER RM NORTH HEATING WATER CIRC ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 70 GPM 40’ 80% 1.5 HP 10 0 P&10 BOILER RM NORTH HEATING WATER CIRC DUPLEX ARMSTR&ONG PUMP MARATHON ELECTRIC MOTOR INLINE 70 GPM 40’ 80% 1.5 HP 10 0
Inlet View Elementary Final Energy Audit Report Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10 MAJOR EQUIPMENT INVENTORY TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE ASHRAE SERVICE LIFE (YEARS) ESTIMATED REMAINING USEFUL LIFE (YEARS) AHU&1 RM 35 LIBRARY VENTILATION PACE BALDOR MOTOR CENTRI&FUGAL 3,905 CFM 2” 82% 3 HP 25 3 FAN&1 RM 21 NORTH VENTILATION WESTERN BLOWER CO. LEESON MOTOR CENTRI&FUGAL 10,000 CFM 1” 82% 3 HP 25 3 FAN&2 RM 21 SOUTH VENTILATION WESTERN BLOWER CO. GENERAL ELECTRIC MOTOR CENTRI&FUGAL 8,000 CFM 1” 75% 3 HP 25 0 FAN&3 RM 21 MPR VENTILATION WESTERN BLOWER CO. GENERAL ELECTRIC MOTOR CENTRI&FUGAL 5,200 CFM 1” 75% 1.5 HP 25 0 & ROOF RELIEF AIR FANS FOR INDIVIDUAL CLASSROOMS NO NAMEPLATE AO SMITH MOTOR RELIEF AIR FAN 10 FANS TOTAL ≈80% ¼ HP 25 5 & ROOF NORTH WING REST&ROOMS EXHAUST FANS (2 TOTAL) NO NAMEPLATE NOT ACCESSIBLE AXIAL ≈250 CFM ≈80% ¼ HP 25 0
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Appendix D
Energy Conservation Measures
Inlet View Elementary
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
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.
$1,971 $1,000 25.44 0.5
2 Other Electrical &
Power Retrofit: DHW
PUMP#5
Replace with New EC Pump $62 $150 3.42 2.4
3 Setback Thermostat:
MPR (Multi&Purpose
Room)
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
MPR (Multi&Purpose Room)
space.
$191 $1,000 2.46 5.2
4 Above&Grade Wall:
MPR Upper South
Wall
Add R&20 rigid foam to
interior or exterior of existing
wall; cost does not include
siding or wall coverings.
$131 $1,311 2.32 10
5 Exterior Door: South
and East Entry Doors
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$111 $1,640 1.58 14.7
6 Lighting & Combined
Retrofit: Classrooms
(w/ Bilevel Control)
Replace with 171 FLUOR (3)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor and Improve Manual
Switching, Multi&Level
Switch
$3,247 $31,150 1.45 9.6
7 Ventilation Add DDC control to place
North Wing restroom exhaust
fans on time schedule.
$456 $4,000 1.37 8.8
8 Other Electrical &
Power Retrofit: AHU&1
MOTOR
Replace with New Premium
Efficiency Motor
$81 $500 1.35 6.2
9 Other Electrical &
Power Retrofit: FAN
F&1 MOTOR
Replace with New Premium
Efficiency Motor
$81 $500 1.35 6.2
10 Other Electrical &
Power Retrofit: FAN
F&2 MOTOR
Replace with New Premium
Efficiency Motor
$72 $450 1.33 6.2
11 Other Electrical &
Power Retrofit: FAN
F&3 MOTOR
Replace with New Premium
Efficiency Motor
$72 $450 1.33 6.2
12 Other Electrical &
Combined Retrofit:
PUMP P&7 & P&8
Replace with 2 New EC
Pumps for P&7 & P&8 and
Remove Manual Switching
$591 $4,000 1.22 6.8
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13 HVAC And DHW Install Exhaust Stack
Economizer for B&1 and B&2
$1,310 $18,500 1.18 14.1
14 Lighting & Power
Retrofit: Mechanical
Replace with 4 FLUOR (4)
T8 4' F32T8 32W Standard
(2) Program
HighEfficElectronic
$33 $400 1.16 12
15 Lighting & Power
Retrofit: Wallpack
Replace with 4 LED 25W
Module StdElectronic
$218 $3,200 0.99 14.7
16 Lighting & Power
Retrofit: Surface
Mount HPS
Replace with 2 LED 25W
Module StdElectronic
$109 $1,600 0.99 14.7
17 Air Tightening Perform air sealing to reduce
air leakage by 20%.
$1,090 $9,800 0.99 9
18 Other Electrical &
Combined Retrofit:
PUMP P&9 & P&10
Replace with 2 New EC
Pump for P&9 & P&10 and
Controls retrofit
$447 $3,800 0.98 8.5
19 Below& (part or all)
Grade Wall: Rm 12 &
13 Walls
Install R&5 rigid insulation on
basement wall
$161 $4,071 0.92 25.4
20 Lighting & Combined
Retrofit: Restrooms
Replace with 13 FLUOR (2)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor
$140 $2,550 0.80 18.2
21 Lighting & Combined
Retrofit: Classrooms
Replace with 69 FLUOR (3)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor and Improve Manual
Switching
$605 $11,700 0.72 19.3
22 Lighting & Combined
Retrofit: Classrooms
Replace with 27 FLUOR (2)
T12 F40T12 40W U&Tube
Standard Magnetic and
Controls retrofit
$209 $4,050 0.72 19.3
23 Lighting & Combined
Retrofit: MPR
Replace with 4 LED 4W
Module StdElectronic and
Improve Manual Switching
$52 $500 0.64 9.6
24 Lighting & Power
Retrofit: Office
Replace with 34 FLUOR (3)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
$231 $5,100 0.63 22.1
25 Lighting & Power
Retrofit: Mechanical
Replace with 18 FLUOR (2)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
$75 $1,800 0.58 24.1
26 Exterior Door: Storage
Rm Metal Door
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$14 $630 0.53 43.8
27 Exterior Door: Wood
Man Doors
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$18 $820 0.51 45.5
28 Window/Skylight:
Original Wood Frame
Windows & North Wing
Replace existing window with
U&0.30 vinyl window
$1,889 $65,576 0.48 34.7
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
29 Above&Grade Wall:
North Wing Clerestory
Wall
Install R&15 rigid foam board
to exterior and cover with T1&
11 siding or equivalent.
$61 $2,953 0.48 48.6
30 Lighting & Power
Retrofit: MPR & Stage
Replace with 10 FLUOR (4)
T8 4' F32T8 32W Standard
(2) Program
HighEfficElectronic
$41 $1,500 0.38 36.2
31 Lighting & Combined
Retrofit: Classrooms
Replace with 44 FLUOR (3)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor and Improve Manual
Switching
$154 $7,500 0.29 48.6
32 Lighting & Power
Retrofit: Mechanical
Replace with 2 FLUOR T8 4'
F32T8 32W Standard
Program HighEfficElectronic
$1 $100 0.19 74
33 Above&Grade Wall:
Original Classroom
Walls
Install R&5 rigid foam board
to exterior and cover with T1&
11 siding or equivalent.
$704 $94,665 0.17 134.4
34 Above&Grade Wall:
Original MPR Walls
Install R&5 rigid foam board
to exterior and cover with T1&
11 siding or equivalent.
$236 $42,317 0.13 179.4
TOTAL $14,867 $329,283 0.65 22.1
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
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
4 Above&Grade Wall:
MPR Upper South
Wall
Wall Type: Other
Wall Construction: Concrete
block, 2 core
Modeled R&Value: 1
Add R&20 rigid foam to
interior or exterior of
existing wall; cost does not
include siding or wall
coverings.
$1,311 $131
19 Below& (part or all)
Grade Wall: Rm 12
& 13 Walls
Wall Type: Strapped Masonry
Insul. Sheathing: None
Masonry Wall: Concrete block,
2 core
Framed Wall: 2 x 3, 16" on
center
EPS (Beadboard), 2 inches
Modeled R&Value: 9.3
Install R&5 rigid insulation
on basement wall
$4,071 $161
29 Above&Grade Wall:
North Wing
Clerestory Wall
Wall Type: Single Stud
Siding Configuration: Just
Siding
Insul. Sheathing: None
Structural Wall: 2 x 2, 16
inches on center
Fiberglass/Loose fill, 1 inches
Window and door headers: Not
Insulated
Modeled R&Value: 5
Install R&15 rigid foam
board to exterior and cover
with T1&11 siding or
equivalent.
$2,953 $61
33 Above&Grade Wall:
Original Classroom
Walls
Wall Type: Stressed Skin Panel
Siding Configuration: Siding
and Sheathing
Panel Insulation: EPS
(Beadboard), 1.16 inches
Modeled R&Value: 7.2
Install R&5 rigid foam board
to exterior and cover with
T1&11 siding or equivalent.
$94,665 $704
34 Above&Grade Wall:
Original MPR
Walls
Wall Type: Single Stud
Siding Configuration: Siding
and Sheathing
Insul. Sheathing: None
Structural Wall: 2 x 6, 16
inches on center
Fiberglass/Loose fill, 2 inches
Window and door headers: Not
Insulated
Modeled R&Value: 8.7
Install R&5 rigid foam board
to exterior and cover with
T1&11 siding or equivalent.
$42,317 $236
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
5 Exterior Door:
South and East
Entry Doors
Door Type: R&1 Door (non&
standard, not exterior)
Modeled R&Value: 1
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$1,640 $111
26 Exterior Door:
Storage Rm Metal
Door
Door Type: Metal & urethane,
no therm. break
Modeled R&Value: 2.5
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$630 $14
27 Exterior Door:
Wood Man Doors
Door Type: Wood &solid core
Modeled R&Value: 2.6
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$820 $18
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
28 Window/Skylight:
Original Wood
Frame Windows &
North Wing
Glass: Single, Glass
Frame: Aluminum, No Thermal
Break
Spacing Between Layers:
Quarter Inch
Gas Fill Type: Air
Modeled U&Value: 1.30
Solar Heat Gain Coefficient
including Window Coverings:
0.52
Replace existing window
with U&0.30 vinyl window
$65,576 $1,889
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
18 Air Tightness estimated as: 1.00
cfm/ft2 of above&grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 20%.
$9,800 $1,090
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
14 Install Exhaust Stack Economizer for B&1 and B&2 $18,500 $1,310
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 $1,971
3 MPR (Multi&
Purpose Room)
Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the MPR (Multi&Purpose
Room) space.
$1,000 $191
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
8 Add DDC control to place North Wing restroom exhaust fans on time schedule. $4,000 $456
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
11 Classrooms (w/
Bilevel Control)
171 FLUOR (3) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching, Multi&
Level Switch
Replace with 171 FLUOR
(4) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor and Improve
Manual Switching, Multi&
Level Switch
$31,150 $3,247
13 Mechanical 4 FLUOR (4) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching
Replace with 4 FLUOR (4)
T8 4' F32T8 32W Standard
(2) Program
HighEfficElectronic
$400 $33
15 Wallpack 4 HPS 100 Watt Magnetic with
On/Off Photoswitch
Replace with 4 LED 25W
Module StdElectronic
$3,200 $218
16 Surface Mount
HPS
2 HPS 100 Watt Magnetic with
On/Off Photoswitch
Replace with 2 LED 25W
Module StdElectronic
$1,600 $109
20 Restrooms 13 FLUOR (2) T12 4' F40T12
40W Standard StdElectronic
with Clock Timer or Other
Scheduling Control
Replace with 13 FLUOR
(2) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor
$2,550 $140
21 Classrooms 69 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 69 FLUOR
(3) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor and Improve
Manual Switching
$11,700 $605
22 Classrooms 27 FLUOR (2) T12 F40T12
40W U&Tube Standard
Magnetic with Manual
Switching
Replace with 27 FLUOR
(2) T12 F40T12 40W U&
Tube Standard Magnetic
and Controls retrofit
$4,050 $209
23 MPR 4 FLUOR (4) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching
Replace with 4 LED 4W
Module StdElectronic and
Improve Manual Switching
$500 $52
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
24 Office 34 FLUOR (4) T12 4' F40T12
40W Standard (2) StdElectronic
with Manual Switching,
Occupancy Sensor
Replace with 34 FLUOR
(3) T8 4' F32T8 32W
Standard Program
HighEfficElectronic
$5,100 $231
25 Mechanical 18 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 18 FLUOR
(2) T8 4' F32T8 32W
Standard Program
HighEfficElectronic
$1,800 $75
30 MPR & Stage 10 FLUOR (4) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching
Replace with 10 FLUOR
(4) T8 4' F32T8 32W
Standard (2) Program
HighEfficElectronic
$1,500 $41
31 Classrooms 44 FLUOR (2) T12 4' F40T12
40W Standard StdElectronic
with Manual Switching
Replace with 44 FLUOR
(3) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor and Improve
Manual Switching
$7,500 $154
32 Mechanical 2 FLUOR T12 4' F40T12 40W
Standard StdElectronic with
Manual Switching
Replace with 2 FLUOR T8
4' F32T8 32W Standard
Program
HighEfficElectronic
$100 $1
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
2 DHW PUMP#5 GRUNDFOS PUMP (180W) Replace with New EC
Pump
$150 $62
6 AHU&1 MOTOR BALDOR MOTOR (3 HP)
with Other Controls
Replace with New
Premium Efficiency Motor
$500 $81
7 FAN F&1 MOTOR LEESON MOTOR (3HP) with
Other Controls
Replace with New
Premium Efficiency Motor
$500 $81
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
9 FAN F&2 MOTOR GEN. ELECTRIC MOTOR
(1.5 HP) with Other Controls
Replace with New
Premium Efficiency Motor
$450 $72
10 FAN F&3 MOTOR GEN. ELECTRIC MOTOR
(1.5 HP) with Other Controls
Replace with New
Premium Efficiency Motor
$450 $72
12 PUMP P&7 & P&8 2 DUPLEX
ARMSTRONG/MARATHON
PUMP & MOTOR (2 HP) with
Manual Switching, Other
Controls
Replace with 2 New EC
Pumps for P&7 & P&8 and
Remove Manual Switching
$4,000 $591
17 PUMP P&9 & P&10 2 DUPLEX
ARMSTRONG/MARATHON
PUMP & MOTOR (1.5 HP)
with Other Controls
Replace with 2 New EC
Pump for P&9 & P&10 and
Controls retrofit
$3,800 $447
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Appendix E
Energy Conservation Measures
Inlet View Elementary Portable Buildings
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
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:
Portable Building
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
Portable Building space.
$591 $2,000 3.63 3.4
2 Exterior Door: Portable
Building & Doors
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$99 $1,230 1.66 12.5
3 Air Tightening Perform air sealing to reduce
air leakage by 30%.
$256 $2,000 1.12 7.8
4 Lighting & Combined
Retrofit: Portable
Lighting
Replace with 12 FLUOR (3)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor, Multi&Level Switch
$143 $1,925 1.14 13.5
5 Window/Skylight:
Portable Building &
Single Pane Windows
Replace existing window with
U&0.22 vinyl window
$200 $2,958 1.04 14.8
6 Ceiling w/ Attic:
Portable Building &
Cold Roof
Add R&30 fiberglass batts to
attic with Standard Truss.
$209 $4,296 1.01 20.6
7 Above&Grade Wall:
Portable Building & 2x4
Stud Wall
Install R&20 rigid foam board
to exterior and cover with T1&
11 siding or equivalent.
$468 $16,934 0.57 36.2
8 Window/Skylight:
Portable Building &
Double Pane Windows
Replace existing window with
U&0.22 vinyl window
$110 $2,958 0.57 26.8
9 Lighting & Combined
Retrofit: Portable
Lighting
Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
Program HighEfficElectronic
and Add new Occupancy
Sensor, Multi&Level Switch
$12 $425 0.42 36.6
TOTAL $2,087 $34,726 0.94 16.6
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
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
6 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.
$4,296 $209
7 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.
$16,934 $468
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
2 Exterior Door:
Portable Building &
Doors
Door Type: Metal & fiberglass
or mineral wool
Modeled R&Value: 1.7
Remove existing door and
install standard pre&hung U&
0.16 insulated door,
including hardware.
$1,230 $99
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
5 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&0.22 vinyl window
$2,958 $200
8 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&0.22 vinyl window
$2,958 $110
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
3 Air Tightness estimated as: 0.80
cfm/ft2 of above&grade shell
area at 75 Pascals
Perform air sealing to
reduce air leakage by 30%.
$2,000 $256
2. Mechanical Equipment
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 Portable Building Existing Unoccupied Heating
Setpoint: 68.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for
the Portable Building space.
$2,000 $591
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
4 Portable Lighting 12 FLUOR (4) T12 4' F40T12
40W Standard (2) Magnetic
with Manual Switching
Replace with 12 FLUOR
(3) T8 4' F32T8 32W
Standard Program
HighEfficElectronic and
Add new Occupancy
Sensor, Multi&Level Switch
$1,925 $143
9 Portable Lighting 3 FLUOR (2) T12 4' F40T12
40W Standard Magnetic with
Manual Switching
Replace with 3 FLUOR (2)
T8 4' F32T8 32W Standard
Program
HighEfficElectronic and
Add new Occupancy
Sensor, Multi&Level Switch
$425 $12
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Appendix F
Site Visit Photos
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
1. Main Entrance 2. South Entry Doors
3. Southeast Face 4. East Entry Doors
5. North Wing Classroom Windows 6. MPR North Windows
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
7. South wall of MPR from roof 8. Corrugated plastic on south wall of MPR
from roof
9. North wing roof 10. South wing roof
11. Typical classroom relief air fan 12. One of three on&site portable buildings
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
13. Two gas&fired Weil McLain boilers 14. Domestic Hot Water Heater and circ pumps
15. Duplex circulation pumps P&7 & P&8 16. Duplex circulation pumps P&9 & P&10
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
17. Siemens APOGEE DDC System 18. Old coal hatch into boiler room
19. Outside air and return air mixing zone in fan
room 20. Fan F&1
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
21. Fan F&2 22. Fan F&3
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
Appendix G
Thermographic Photos
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
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 outside air temperature is approximately &5F.
1. Optical Image, West Entry. Thermal Image below is indicated by the white border.
2. Thermographic Image, West Entry. Temperatures indicated by color scale on right. Yellow
indicates heat leakage.
Inlet View Elementary
Coffman Engineers, Inc. 6/13/2012
3. Optical Image, West MPR Wall. Thermal
Image to the right is indicated by the white
border.
5. Optical Image, West MPR Windows.
Thermal Image to the right is indicated by the
white border.
7. Optical Image, South Entry Doors. Thermal
Image to the right is indicated by the white
border.
Inlet View Elementary Final Energy Audit Report
Coffman Engineers, Inc. 6/13/2012 AkWarm No. CIRI&ANC&CAEC&10
9. Optical Image, Old Coal Dump Hatch.
Thermal Image to the right is indicated by the
white border.
10. Thermographic Image, Old Coal Dump
Hatch. Heat loss occurring through un&
insulated hatch.
11. Optical Image, Combustion Air Vent.
Thermal Image to the right is indicated by the
white border.
12. Thermographic Image, Combustion Air Vent.
Heated air from boiler room is rising out of
vent due to stack effect.
13. Optical Image, West Library Wall. Thermal
Image to the right is indicated by the white
border.
14. Thermographic Image, West Library Wall.
Heat loss through poorly insulated wall.
Inlet View Elementary
Coffman Engineers, Inc. 6/13/2012
15. Optical Image, Portable Building. Thermal
Image to the right is indicated by the white
border.