HomeMy WebLinkAboutASRC-BTI-RSA Kaktovik Police 2012-EERichard S. Armstrong, PE, LLC
Mechanical/Electrical Engineer
Comprehensive Energy Audit
of
Public Safety Office
Kaktovik, Alaska
Project # ASRC"BTI"RSA"01
Prepared for:
North Slope Borough CIPM
Phone: 907"852"0489
Barrow, Alaska
January 23, 2012
Prepared by:
Richard S. Armstrong, PE, LLC
2321 Merrill Field Drive, C$6
Anchorage, AK 99501
and
RSA Engineering, Inc.
2422 Arctic Blvd., Suite 200
Anchorage, AK 99503
Kaktovik Public Safety Office Comprehensive Energy Audit
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TABLE OF CONTENTS
1. Report Disclaimers 3
2. Executive Summary 4
3. Audit and Analysis Background 7
4. Acknowledgements 9
5. Building Description & Function 10
6. Historic Energy Consumption 11
7. Energy Efficiency Measures Considered or Recommended 12
8. Interactive Effects of Projects 14
9. Loan Program 14
Appendix A: Photos 16
Appendix B: AkWarm"C Report 22
Appendix C: Building Schedules and Plans 28
Performed by: ___________________________
Tyler T. Gray, BSME, CEA
CEA # 1627
RSA Engineering, Inc.
Reviewed by: ___________________________
Richard Armstrong, PE, CEM
CEA #178, CEM # 13557
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1. Report Disclaimers
The information contained in this report, including any attachments, is
intended solely for use by the building owner and the AHFC. No others
are authorized to disclose, copy, distribute or retain this report, in whole or
part, without written authorization from Richard S. Armstrong, PE, LLC,
2321 Merrill Field Drive, C$6, Anchorage, AK 99501. Additionally, this
report contains recommendations that, in the opinion of the auditor, will
cause the owner to realize energy savings over time. All
recommendations must be designed by a registered engineer, licensed in
the State of Alaska, in the appropriate discipline. Lighting
recommendations should all be first reviewed by running a lighting
analysis to assure that the recommended lighting upgrades will comply
with State of Alaska Statue as well as IES recommendations.
Payback periods may well vary from those forecast due to the uncertainty
of the final installed design, configuration, equipment selected, and
installation costs of recommended Energy Efficiency Measures (EEMs), or
the operating schedules and maintenance provided by the owner.
Furthermore, EEMs are typically interactive, so implementation of one
EEM may impact the cost savings from another EEM. Neither the auditor,
Richard S. Armstrong, PE, LLC, AHFC, or others involved in preparation of
this report will accept liability for financial loss due to EEMs that fail to
meet the forecasted payback periods.
This audit meets the criteria of an Investment Grade Audit (IGA) per the
Association of Energy Engineers definition, and is valid for one year. The
life of the IGA may be extended on a case$by$case basis, at the discretion
of the AHFC.
IGSs are the property of the State, and may be incorporated into AkWarm$
C, the Alaska Energy Data Inventory (ARIS), or other state and/or public
information system.
Kaktovik Public Safety Office Comprehensive Energy Audit
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Investment Grade Energy Audit
Kaktovik Public Safety Office
2. Executive Summary:
The Kaktovik (aka Barter Island$BTI) Public Safety Office (PSO) is a
2,695 sq ft. wood frame structure with an attached garage. This
building is occupied 24/7 by the village police officer and also houses
the local detention cells. The facility was originally a single family
home which was renovated to be a PSO in 1997. The building and
garage are on piles, with wood framed walls, cold attic space and
batt insulation throughout.
The facility is owned and operated by the North Slope Borough
(NSB). Benchmark energy use data collected for this building is
presented in Table 1 below:
Table 1
2009 2009 2010 2010
Utility Consumption Cost/Year Consumption Cost/Year
Electricity$kWh 46,815 $12,861 44,063 $11,660
No. 2 Fuel Oil $
Gallons
*3,472 *$12,881 3,472 $12,881
Ttl Energy Costs N/A $24,541
* Fuel data and costs available for 2010 only, assumed to be similar for 2009
A benchmark measure of energy use relative to other similar function
buildings in the area is the Energy Use Index (EUI), which takes the
total annual energy used by the facility divided by the square footage
area of the building, for a value expressed in terms of kBTU/SF.
This number can then be compared to other buildings to see if it is
about average, higher or lower than similar buildings in the area.
Likewise, the Energy Cost Index (ECI) is the cost of all energy used
by the building expressed in $/SF of building area. The comparative
values for the subject building are listed in Table 2:
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Table 2
Kaktovik
Public Safety
Office
Kaktovik Harold
Kaveolook
School
Anaktuvuk
Pass
Fire Station
Energy Use Index (EUI)
kBTU/SF Avg 2009, 2010
236.2 183.3 163.5
Energy Cost Index (ECI)
Average 2009, 2010
$9.10 $9.15 $5.97
Various Energy Efficiency Measures (EEMs) have been analyzed for
this building to determine if they would be applicable for energy
savings with reasonably good payback periods. Those EEMs that
have a payback period or those that are recommended for code
compliance, life cycle replacement, or other reasons are also
included.
Specific EEMs recommended for this facility are detailed in the
attached AkWarm Energy Audit Report along with specific payback
times, as well as estimated installation costs and estimated energy
savings. The higher priority items are summarized below:
a. Air Handler & Heat Recovery Ventilator Controls
i. The major ventilation units are equipped with a Direct
Digital Controller, however the controls are currently
out of tune and inoperative. The actuators are
currently manually controlled by maintenance and the
officers on duty. These units are HRV$1 supplying the
residence and office portions facility, and AHU$1
supplying ventilation to the holding cells. AHU$1 and
HRV$1 are both 100% outside air units and operated
continuously. Continuous operation results in a high
energy usage. It is recommended that these units be
fit with new digital controls, electric actuators, space
temperature and carbon dioxide sensors to operate on
an occupancy schedule with nighttime setback
options.
ii. Carbon Dioxide (CO2) Monitoring: CO2 sensors can
be utilized to help reduce the amount of outside air
drawn into the building.
Kaktovik Public Safety Office Comprehensive Energy Audit
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iii. The above changes to AHU control will provide an
estimated 10$15% annual energy savings with an
expected payback of approximately 6 years.
b. Install VFD Circulators: The current building circulators are
constant volume, and are run continuously. Substantial
energy savings can be realized with the installation of
variable frequency pumps designed to operate when
necessary to meet the building load. The two existing
boilers are Weil$Mclain WGO cast iron sectional boilers.
These boilers are assumed to be operating at 82%
efficiency due to their age. Due to efficiency increases this
EEM is expected to pay off in approximately 6 years.
c. Reduce Thermostat Set Points: Most of spaces in the
building have a daytime heating setpoint of 70 degrees. It is
recommended that the nighttime setpoint be reduced to 60
degrees F. Costs for this measure are limited to the
installation of nighttime setback programmable thermostats.
The payback for this measure would be approximately 2
years.
d. Lighting Occupancy Sensors: This facility is a good
candidate for occupancy sensor lighting. For a minimum of
cost per circuit, the wall switches can be replaced with
occupancy sensors. The occupancy level of this facility is
typically only one officer, with occasional detainees.
Installation of occupancy sensors in the major areas results
in a return on investment of less than 4 years.
e. Install new Weather Stripping, Wrap and Siding: It is
reported that during winter storms and high winds the
building temperature drops to below setpoint, at times as far
as to risk the safety of the building and occupants. This
indicates that the building is experiencing a high level of
infiltration. It is recommended that a blower door test be
performed to confirm the sources of infiltration. If infiltration
is from door and window weather stripping, apply new
weather stripping. If the air is penetrating the siding, the
building siding should be removed, the building re$covered
Kaktovik Public Safety Office Comprehensive Energy Audit
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in building wrap and new siding installed. This repair is
considered to be necessary due to the age of the facility,
and would be a cost to the owner regardless of energy
savings.
In addition to EEMs, various Energy Conservation Measures (ECMs)
are recommended that were not part of the energy audit model.
Some involve a modest capital investment. Others are policies or
procedures that are followed by management and employees that
require no capital outlay. Examples of recommended ECMs for this
facility include:
1. Turn off computers, monitors, printers, faxes, coffee
makers, etc when leaving the office for the day.
2. Install heat recovery heat exchanger and extend district
heating loop from adjacent clinic.
The priority recommendations in the detailed report estimate to save
$10,401/year, with an installed cost of $56,970 for a 5.5 year
payback. This does not include design or CA services, but overall it
does indicate a cost effective energy savings program.
3. Audit and Analysis Background:
a. Program Description: This audit included services to identify,
develop, and evaluate energy efficiency measures at the
subject building. The scope of this project included evaluating
the building shell, lighting, other electrical systems, and
heating, ventilating, and air conditioning (HVAC) equipment.
Measures were selected such that an overall simple payback
period of 8 years or less could be achieved.
b. Audit Description and Methodology: Preliminary audit
information was gathered in preparation for the site survey,
including benchmark utility consumption data, floor and lighting
plans, and equipment schedules where available. A site visit
was performed to inventory and evaluate the actual building
condition, including:
i. Building envelope (roof, windows, etc)
Kaktovik Public Safety Office Comprehensive Energy Audit
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ii. Heating, ventilating, and air conditioning
iii. Lighting systems and controls
iv. Building specific equipment
v. Plumbing systems
c. Method of Analysis: The information gathered prior to the site
visit and at the site visit is entered into AkWarm$C, an energy
modeling developed for Alaska Housing Finance Corporation
(AHFC) specifically to identify forecasted energy consumption
which can be compared to actual energy consumption.
AkWarm$C also has some pre$programmed EEM retrofit
options that can be analyzed with energy savings forecasted
based on occupancy schedules, utility rates, building
construction type, building function, existing conditions, and
climatic data that is already uploaded to the program based on
the zip code of the building. When new equipment is
proposed, energy consumption is calculated based on
manufacturer’s cataloged information.
Cost savings are calculated based on the historical energy
costs for the building. Installation costs include labor and
equipment to estimate the full up$front investment required to
implement a change, but design and construction management
costs are excluded. Costs are derived from Means Cost Data,
industry publications, experience of the auditor, local
contractors and equipment suppliers. Maintenance savings
are calculated were applicable and are added to the energy
savings for each EEM.
The cost and savings are applied and a simple payback and
simple return on investment (ROI) is calculated. The simple
payback is based on the number of years that it takes for the
savings to pay back the net installation cost (Net Installation
divided by Net Savings.)
A simple life$time calculation is shown for each EEM. The life$
time for each EEM is estimated based on the typical life of the
equipment being replaced or altered. The energy savings is
extrapolated throughout the life$time of the EEM. The total
Kaktovik Public Safety Office Comprehensive Energy Audit
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energy savings is calculated as the total life$time multiplied by
the yearly savings.
d. Limitations of the Study: All results are dependent on the
quality of input data provided, and can only act as an
approximation. In some instances, several methods may
achieve the identified savings. This report is not intended as a
final design document. A design professional, licensed to
practice in Alaska and in the appropriate discipline, who is
following the recommendations, shall accept full responsibility
and liability for the results. Budgetary estimates for
engineering and design of these projects in not included in the
cost estimate for each measure, but these costs generally run
around 15% of the cost of the work.
4. Acknowledgements: We wish to acknowledge the help of numerous
individuals who have contributed information that was used to prepare
this report, including:
a. Alaska Housing Finance Corporation (Grantor): AHFC
provided the grant funds, contracting agreements, guidelines,
and technical direction for providing the audits. AHFC
reviewed and approved the final short list of buildings to be
audited based on the recommendation of the Technical
Service Provider (TSP).
b. North Slope Borough (Owner): The NSB provided building
access, original construction plans, two years energy billing
data, building schedules and functions, as well as other
resources needed to perform the audit.
c. Richard S. Armstrong, PE, LLC (Audit TSP): This is the
TSP who was awarded the projects in the Arctic Slope
Regional Corporation, Bering Straits area, and the Nana area.
The firm gathered all relevant benchmark information provided
to them by Nortech, cataloged which buildings would have the
greatest potential payback, and prioritized buildings to be
audited based on numerous factors, including the Energy Use
Index (EUI), the Energy Cost Index (ECI), the age of the
building, the size of the building, the location of the building,
Kaktovik Public Safety Office Comprehensive Energy Audit
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the function of the building, and the availability of plans for the
building. They also trained their selected sub$contracted
auditors, assigned auditors to the selected buildings, and
performed quality control reviews of the resulting audits. They
prepared a listing of potential EEMs that each auditor must
consider, as well as the potential EEMs that the individual
auditor may notice in the course of his audit. Richard S.
Armstrong, PE, LLC also performed some of the audits to
assure current knowledge of existing conditions.
5. Building Description and Function: The subject structure is the
Kaktovik (Barter Island) Public Safety Office (PSO). The facility is
2,695 sq ft. with an attached garage which was originally a single
family home and renovated to be the PSO in 1997. This building is
occupied 24/7 by the village police officer, and also houses the local
detention cells. The building and garage are on piles, with wood
framed walls, cold attic space and batt insulation throughout. It is a
one story structure with an insulated utildor below the building for
waste and water piping routing to the water service barrel. The
interior finished ceiling in the hallways, common areas, office,
kitchen and various storage and utility rooms are GWB with heights
ranging from 8 to 9 feet. The typical building construction is as
follows: Roof structure is wooden trusses in a cold attic space with
batt insulation, exterior walls are 2x6 framed walls with batt
insulation, floor structure is wood truss and glulam beams supported
on piles with batt insulation. The exteriors are covered with metal
roofing and plywood siding respectively. The roof insulation value is
approximately R$38, the exterior walls approximately R$19 and the
floor is approximately R$30. The overall building design and
construction is similar to many single family structures that were built
in Northern Alaska in the late ‘70s and early ‘80s. Although the
interior finishes are adequate, the building envelope is in fair to poor
condition and is due for renovations. The building is occupied year
around.
a. Heating System: The heating plant is two (2) Weil$Mclain
WGO$4 fuel oil boilers providing hydronic heat to baseboard
fintube and unit heaters. The boilers are operated with hi$low
aqua stats, and are run year around. The hydronic circulator is
a simplex Bell and Gossett PL$130 constant volume pump.
Kaktovik Public Safety Office Comprehensive Energy Audit
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Domestic hot water is provided by a hydronic hot water
generator supplied by the boilers, Amtrol model number WH$
7L. There is no heat recovery in this facility. The boilers
appear to be in fair operating condition and are due for regular
maintenance. Refer to Table 1 for average annual utility
consumption data.
b. Ventilation System: There are two ventilation units in the
facility. HRV$1 is a 100% outside air unit with heat recovery
which serves all common areas of the building, including the
kitchen, bedroom, interview room and office. AHU$1 serves
the holding cells only. The DDC controller currently installed
that is designed to control HRV$1 and AHU$1 operation and
dampers is currently not operational. The ventilation
equipment actuators have been overridden for manual control.
Exhaust fans are installed in the restroom (EF$1), Holding Cells
(EF$2), and Communications closet (EF$3). EF$1 operates
with the light, EF$2 is switch operated, and EF$3 runs
continuously.
c. Plumbing System: Water is provided from the village utility
and there is not any on$site storage or any metering of water
consumption. Hot water is generated using an Amtrol Boiler
Mate model indirect water heaters. No additional hot water
storage is provided. Fixtures include a water closet, lavatory,
single head shower, kitchen sink, mop sink, and two
penitentiary grade combi$units. The waste system is gravity
drained though a heated utilidor to the service barrel.
d. Lighting: Typical lighting throughout the building occupied
spaces is T$8 fluorescent fixtures using electronic ballasts.
CFL bulbs are present where incandescent bulbs were
originally designed for smaller areas.
6. Historic Energy Consumption: Energy consumption is modeled
within the AkWarm$C program. The program only analyzes 12
months of data, so where 24 months of data are available, the data is
averaged and input to AkWarm$C to provide more accuracy. Refer to
Table 1 for utility data, the energy consumption data is also presented
and graphed in the attached AkWarm$C program results.
Kaktovik Public Safety Office Comprehensive Energy Audit
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The average electric consumption for the building is 45,439 kWh/year
at an average cost of $12,260/year. The fuel oil consumption in 2010
was 3,472 gallons, at annual cost of $12,881.
7. Energy Efficiency Measures (EEM) considered or recommended:
The building was examined for application of a multitude of potential
EEMs that are discussed below. Those EEMs that appear to have an
application for the subject building are further analyzed for estimated
payback periods, either within the AkWarm$C program or separately
within this report. The accuracy of the cost estimates and paybacks
varies significantly due to a multitude of conditions, but is estimated to
be approximately +/$ 25%. Assumptions made regarding energy costs
and the life of the EEM, noting that post$construction measurement
and verification are based on energy savings, not energy cost
savings. Many of the selected EEMs are analyzed within the
AkWarm$C program using the schedules and estimated costs input
into the model.
a. Air Handler & Heat Recovery Ventilator Controls:
i. The major ventilation units are equipped with a Direct
Digital Controller, however the controls are currently out
of tune and inoperative. The actuators are currently
manually controlled by maintenance and the officers on
duty. These units are HRV$1 supplying the residence
and office portions facility, and AHU$1 supplying
ventilation to the holding cells. AHU$1 and HRV$1 are
both 100% outside air units and operated continuously.
Continuous operation results in a high energy usage. It
is recommended that these units be fit with new digital
controls, electric actuators, space temperature and
carbon dioxide sensors to operate on an occupancy
schedule with nighttime setback options.
ii. Carbon Dioxide (CO2) Monitoring: CO2 sensors can be
utilized to help reduce the amount of outside air drawn
into the building. Rather than supply a set minimum
amount of outside air during AHU operation (20% of total
AHU air volume, for example) the outside air can be
varied to maintain the CO2 levels below a determined
setpoint, typically 800$1000ppm. This often results in
Kaktovik Public Safety Office Comprehensive Energy Audit
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less outside air being drawn into the building, which
reduces the amount of energy needed to heat the air.
iii. The above changes to AHU control will provide an
estimated 10$15% annual energy savings with an
expected payback of approximately 6 years.
b. Install VFD Circulators: The current building circulators are
constant volume, and are run continuously. Substantial energy
savings can be realized with the installation of variable
frequency pumps designed to operate when necessary to meet
the building load. The two existing boilers are Weil$Mclain
WGO cast iron sectional boilers. These boilers are assumed
to be operating at 82% efficiency due to their age. Due to
efficiency increases and maintenance savings this EEM is
expected to pay off in approximately 6 years.
c. Reduce Thermostat Set Points: Most of spaces in the
building have a daytime heating setpoint of 70 degrees. It is
recommended that the nighttime setpoint be reduced to 60
degrees F. Costs for this measure are limited to the
installation of nighttime setback programmable thermostats.
The payback for this measure would be approximately 2 years.
d. Lighting Occupancy Sensors: This facility is a good
candidate for occupancy sensor lighting. For a minimum of
cost per circuit, the wall switches can be replaced with
occupancy sensors. The occupancy level of this facility is
typically only one officer, with occasional detainees. Installation
of occupancy sensors in the major areas results in a return on
investment of less than 4 years.
e. Install new Weather Stripping, Wrap and Siding: It is
reported that during winter storms and high winds the building
temperature drops to below setpoint, at times as far as to risk
the safety of the building and occupants. This indicates that
the building is experiencing a high level of infiltration. It is
recommended that a blower door test be performed to confirm
the sources of infiltration. If infiltration is from door and window
weather stripping, apply new weather stripping. If the air is
penetrating the siding, the building siding should be removed,
Kaktovik Public Safety Office Comprehensive Energy Audit
14
the building re$covered in building wrap and new siding
installed. This repair is considered to be necessary due to the
age of the facility, and would be a cost to the owner regardless
of energy savings.
8. Interactive Effects of Projects: The AkWarm$C program calculates
savings assuming that all recommended EEM are implemented. If
some EEMs are not implemented, savings for the remaining EEMs will
be affected, in some cases positively, and in others, negatively. For
example, if the fan motors are not replaced with premium efficiency
motors, then the savings for the project to install variable speed drives
(VFDs) on the fans will be increased.
In general, all projects were evaluated sequentially so that energy
savings associated with one EEM would not be attributed to another
EEM as well. For example, the night setback EEM was analyzed
using the fan and heating load profile that will be achieved after
installation of the VFD project is completed. By modeling the
recommended projects sequentially, the analysis accounts for
interactive effects between the EEMs and does not “double count”
savings.
Interior lighting, plug loads, facility equipment, and occupants
generate heat within the building. When the building is in cooling
mode, these contribute to the overall cooling demands of the
building; therefore lighting efficiency improvements will reduce
cooling requirements on air conditioned buildings. Conversely,
lighting efficiency improvements are anticipated to increase heating
requirements slightly. Heating penalties are included in the lighting
project analysis that is performed by AkWarm$C.
9. Loan Program: The Alaska Housing Finance Corporation (AHFC)
Alaska Energy Efficiency Revolving Loan Fund (AEERLF) is a State of
Alaska program enacted by the Alaska Sustainable Energy Act
(senate Bill 220, A.S. 18.56.855, “Energy Efficiency Revolving Loan
Fund). The AEERLF will provide loans for energy efficiency retrofits
to public facilities via the Retrofit Energy Assessment for Loan System
(REAL). As defined in 15 AAC 155.605, the program may finance
energy efficiency improvements to buildings owned by:
Kaktovik Public Safety Office Comprehensive Energy Audit
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a. Regional educational attendance areas;
b. Municipal governments, including political subdivisions of
municipal governments;
c. The University of Alaska;
d. Political subdivisions of the State of Alaska, or
e. The State of Alaska
Native corporations, tribal entities, and subsidiaries of the federal
government are not eligible for loans under this program.
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Appendix A: Photos
Exterior, View looking Southeast
Exterior, View looking Northwest
Kaktovik Public Safety Office Comprehensive Energy Audit
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Fuel Oil Storage Tank
Cold Attic Space & Exhaust Ducts
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Heating Plant " Hydronic Circulator and DHW Generator
Heating Plant " Weil"Mclain Cast Iron Boilers
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HRV"1 " Heat Recovery Ventilator
AHU"1 " Air Handler Serving Holding Cells
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Digital Controller for AHU"1, HRV"1 " Controls are inoperative
AHU"1 Outside Air Damper " Disconnected Actuator
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Typical Holding Cell Lighting
Typical T"8 Interior lighting
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Appendix B: AK Warm Energy Model
ENERGY AUDIT REPORT – PROJECT SUMMARY – Created 2/26/2012 1:38 PM
General Project Information
PROJECT INFORMATION AUDITOR INFORMATION
Building: NSB Public Safety Auditor Company: RSA Engineering
Address: 4th and Barter Avenue Kaktovik Alaska Auditor Name: Tyler Gray
City: Kaktovik Auditor Address: 2522 Arctic Blvd. Suite 200
Client Name: Darrel Love
Client Address: Auditor Phone: (907) 27610521
Auditor FAX:
Client Phone: (907) 85210311 Auditor Comment:
Client FAX:
Design Data
Building Area: 2,695 square feet Design Heating Load: Design Loss at Space: 104,186 Btu/hour
with Distribution Losses: 105,238 Btu/hour
Plant Input Rating assuming 82.0% Plant Efficiency and 25%
Safety Margin: 160,424 Btu/hour
Note: Additional Capacity should be added for DHW load, if
served.
Typical Occupancy: 3 people Design Indoor Temperature: 68.7 deg F (building average)
Actual City: Kaktovik Design Outdoor Temperature: 139.3 deg F
Weather/Fuel City: Kaktovik Heating Degree Days: 20,370 deg F1days
Utility Information
Electric Utility: North Slope Borough Utilities 1 Commercial 1
Sm
Natural Gas Provider: None
Average Annual Cost/kWh: $0.288/kWh Average Annual Cost/ccf: $0.000/ccf
Annual Energy Cost Estimate
Description Space
Heating
Space
Cooling
Water
Heating Lighting Refrige
ration
Other
Electri
cal
Cooking Clothes
Drying
Ventilatio
n Fans
Service
Fees
Total
Cost
Existing
Building
$15,172 $0 $861 $5,874 $241 $137 $237 $237 $1,497 $180 $24,436
With
Proposed
Retrofits
$7,046 $0 $529 $4,973 $235 $133 $231 $231 $479 $180 $14,036
SAVINGS $8,126 $0 $332 $902 $6 $4 $6 $6 $1,019 $0 $10,401
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PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
1 Setback Thermostat:
101,102,103 1 Office
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
101,102,103 1 Office space.
$468 $200 34.56 0.4
2 Setback Thermostat:
110, 114, 115 1
Booking/Cells
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
110, 114, 115 1 Booking/Cells
space.
$232 $200 17.14 0.9
3 Setback Thermostat:
109 1 Garage
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
109 1 Garage space.
$196 $200 14.47 1
4 Setback Thermostat:
1161Mechanical
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
1161Mechanical space.
$139 $200 10.26 1.4
5 Setback Thermostat:
104 1 Interview
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
104 1 Interview space.
$67 $200 4.95 3
6 Setback Thermostat:
105 1 TDY
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
105 1 TDY space.
$59 $200 4.34 3.4
7 Lighting: Garage
Lighting
Remove Manual Switching
and Add new Occupancy
Sensor
$248 $354 4.13 1.4
8 Setback Thermostat:
107 1 Restroom
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
107 1 Restroom space.
$49 $200 3.59 4.1
9 Setback Thermostat:
100 1 Entry
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
100 1 Entry space.
$45 $200 3.32 4.4
10 Setback Thermostat:
106 1 Kitchen
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
106 1 Kitchen space.
$42 $200 3.14 4.7
11 HVAC And DHW Replace pumps with VFD $937 $5,000 2.63 5.3
12 Setback Thermostat:
108 1 Evidence
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
108 1 Evidence space.
$31 $200 2.31 6.4
13 Ventilation Install DDC controlls on
AHU11, HRV11, CO2 sensor,
Boiler Loop Temperture, EF1
2
$3,671 $24,000 2.15 6.5
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PRIORITY LIST – RECOMMENDED ENERGY EFFICIENCY MEASURES
Rank Feature Recommendation Annual Energy
Savings
Installed
Cost
SIR Payback
(Years)
14 Lighting: Interior
Hallway
Remove Manual Switching
and Add new Occupancy
Sensor
$92 $354 1.66 3.9
15 Air Tightening: All
exterior siding
Perform air sealing to reduce
air leakage by 3000 cfm at 50
Pascals.
$3,917 $24,000 1.66 6.1
16 Lighting: Cell lights Remove Manual Switching
and Add new Occupancy
Sensor
$88 $354 1.49 4
17 Lighting: Cell hallway Remove Manual Switching
and Add new Occupancy
Sensor
$87 $354 1.47 4.1
18 Lighting: Kitchen
Lighting
Remove Manual Switching
and Add new Occupancy
Sensor
$33 $354 0.56 10.8
19 Setback Thermostat:
111, 112, 113 1
Hallway/laundry/Com
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
111, 112, 113 1
Hallway/laundry/Com space.
$0 $200 0.00 Infinity
TOTAL $10,401 $56,970 2.24 5.5
ENERGY AUDIT REPORT – ENERGY EFFICIENT RECOMMENDATIONS
1. Building Envelope
Insulation
Rank Location Existing Type/R;Value Recommendation Type/R;
Value
Installed
Cost
Annual
Energy
Savings
Exterior Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Windows and Glass Doors – Replacement
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
Air Leakage
Rank Location Estimated Air Leakage Recommended Air Leakage
Target
Installed
Cost
Annual
Energy
Savings
15 All exterior siding Air Tightness estimated as: 4000
cfm at 50 Pascals
Perform air sealing to reduce
air leakage by 3000 cfm at 50
Pascals.
$24,000 $3,917
Kaktovik Public Safety Office Comprehensive Energy Audit
26
2. Mechanical Equipment
Mechanical
Rank Recommendation Installed
Cost
Annual
Energy
Savings
11 Replace pumps with VFD $5,000 $937
Setback Thermostat
Rank Location Size/Type/Condition Recommendation Installed
Cost
Annual
Energy
Savings
1 101,102,103 1 Office Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
101,102,103 1 Office space.
$200 $468
2 110, 114, 115 1
Booking/Cells
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
110, 114, 115 1 Booking/Cells
space.
$200 $232
3 109 1 Garage Existing Unoccupied Heating
Setpoint: 65.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
109 1 Garage space.
$200 $196
4 1161Mechanical Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
1161Mechanical space.
$200 $139
5 104 1 Interview Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
104 1 Interview space.
$200 $67
6 105 1 TDY Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
105 1 TDY space.
$200 $59
8 107 1 Restroom Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
107 1 Restroom space.
$200 $49
9 100 1 Entry Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
100 1 Entry space.
$200 $45
10 106 1 Kitchen Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
106 1 Kitchen space.
$200 $42
12 108 1 Evidence Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
108 1 Evidence space.
$200 $31
Kaktovik Public Safety Office Comprehensive Energy Audit
27
19 111, 112, 113 1
Hallway/laundry/Co
m
Existing Unoccupied Heating
Setpoint: 70.0 deg F
Implement a Heating
Temperature Unoccupied
Setback to 60.0 deg F for the
111, 112, 113 1
Hallway/laundry/Com space.
$200 $0
Ventilation
Rank Recommendation Cost Annual
Energy
Savings
13 Install DDC controlls on AHU11, HRV11, CO2 sensor, Boiler Loop Temperture, EF12 $24,000 $3,671
3. Appliances and Lighting
Lighting Fixtures and Controls
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
7 Garage Lighting 10 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$354 $248
14 Interior Hallway 3 FLUOR (2) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$354 $92
16 Cell lights 2 FLUOR (3) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$354 $88
17 Cell hallway 2 FLUOR (3) T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$354 $87
18 Kitchen Lighting 2 FLUOR T8 4' F32T8 32W
Standard Instant StdElectronic
with Manual Switching
Remove Manual Switching
and Add new Occupancy
Sensor
$354 $33
Refrigeration
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Other Electrical Equipment
Rank Location Existing Recommended Installed
Cost
Annual
Energy
Savings
Cooking/Clothes Drying
Rank Recommended Installed
Cost
Annual
Energy
Savings
Kaktovik Public Safety Office Comprehensive Energy Audit
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Appendix C: Existing Plans