HomeMy WebLinkAboutSEA-AEE-JNU Douglas Fire Station and Library 2012-EE
Douglas Fire Station and Library
City and Borough of Juneau
Funded by:
Final Report
November 2011
Prepared by:
Energy Audit
Table of Contents
Section 1: Executive Summary 2
Section 2: Introduction 5
Section 3: Energy Efficiency Measures 8
Section 4: Description of Systems 13
Section 5: Methodology 15
Appendix A: Energy and Life Cycle Cost Analysis 18
Appendix B: Utility and Energy Data 26
Appendix C: Equipment Data 33
Appendix D: Abbreviations 35
Audit Team
The energy audit is performed by Alaska Energy Engineering LLC of Juneau, Alaska. The audit team
consists of:
Jim Rehfeldt, P.E., Energy Engineer
Jack Christiansen, Energy Consultant
Brad Campbell, Energy Auditor
Loras O’Toole P.E., Mechanical Engineer
Will Van Dyken P.E., Electrical Engineer
Curt Smit, P.E., Mechanical Engineer
Philip Iverson, Construction Estimator
Karla Hart, Technical Publications Specialist
Jill Carlile, Data Analyst
Grayson Carlile, Energy Modeler
Douglas Fire Hall and Library 1 Energy Audit (November 2011)
Section 1
Executive Summary
An energy audit of the Douglas Fire Station and Library was performed by Alaska Energy
Engineering LLC. The investment grade audit was funded by Alaska Housing Finance Corporation
(AHFC) to identify opportunities to improve the energy performance of public buildings throughout
Alaska.
The Douglas Fire Station and Library is a 14,530 square foot building that contains the fire station
and support rooms, living quarters in the penthouse spaces, library, meeting rooms, storage, and
mechanical support spaces.
Building Assessment
The following summarizes our assessment of the building.
Envelope
Exterior doors and fire hall overhead doors have poor weather stripping. The exterior doors are not
thermally broken. Future exterior door replacement selection should include this feature. The
penthouse windows are wooden framed units with storm windows and provide a very low R-value.
Two uninsulated 8” concrete exterior walls in the parking lot-level storage room can be easily
insulated to reduce building heating loads.
Heating System
The fuel oil boiler heating system is in good condition; however, fairly simple improvements can be
made to improve its effectiveness and efficiency. These are outlined in Section 3, Energy Efficiency
Measures. The boiler and diesel generator exhaust are only 4 feet above the top of the roof and do not
meet current codes. Also, the boiler controls are not working properly. The heating supply
temperature is being controlled by the low limit override setpoint of 120° F. This is too low to prevent
condensation of flue gases in the boiler and chimney.
Domestic Hot Water System
An electric hot water heater supplies the fixtures. The unit has a 15 kW recovery rate which is likely
higher than needed. A heater with three 5 kW elements and a demand controller will reduce demand
charges.
Ventilation System
The building ventilation systems consist of three air handling units; AHU-1, AHU-2, and AHU-3, all
of which are located in the mechanical room. During the inspection it was noted that the automatic
controls for the outside air dampers are not working properly and should be addressed. It was also
noted that the setpoint for mixing of outside air with building return air was 55° F. By raising this set
point to 60° F the amount of colder outside air that must be heated to room temperature will be
reduced, thereby resulting in energy savings. This is outlined in more detail in Section 3, Energy
Efficiency Measures. Oil and solvents were being stored in the fire hall tool room, a space without
dedicated exhaust air. This does not meet current code standards.
Douglas Fire Hall and Library 2 Energy Audit (November 2011)
Lighting
Interior lighting primarily consists of incandescent and T12 fluorescent fixtures. Exterior lighting
consists primarily of high pressure sodium fixtures. The exterior lighting utilizes both manual
switching and photocell controls. During the audit all of the parking lot lighting and several of the
exterior lights were operated by their photocell controls several hours longer than necessary,
indicating a need to adjust the photocell unit in the parking garage for proper control.
Energy Efficiency Measures (EEMs)
All buildings have opportunities to improve their energy efficiency. The energy audit revealed
numerous opportunities in which an efficiency investment will result in a net reduction in long-term
operating costs.
Behavioral and Operational EEM
The following EEM requires behavioral and operational changes in the building use. The savings are
not readily quantifiable but this EEM is highly recommended as a low-cost opportunity that is a
standard of high performance buildings.
EEM-1: Weather-strip Doors
High and Medium Priority EEMs
The following EEMs are recommended for investment. They are ranked by life cycle savings to
investment ratio (SIR). This ranking method places a priority on low cost EEMs which can be
immediately funded, generating energy savings to fund higher cost EEMs in the following years.
Negative values, in parenthesis, represent savings.
25 Year Life Cycle Cost Analysis
Investment Operating Energy Total SIR
High Priority
EEM-2: Reduce Entrance Temperature $100 $0 ($13,100) ($13,000) 131.0
EEM-3: Adjust Lighting Photocell $200 $100 ($9,100) ($8,800) 45.0
EEM-4: Install Pipe Insulation $100 $0 ($1,400) ($1,300) 14.0
EEM-5: Perform Boiler Combustion Test $700 $2,300 ($9,500) ($6,500) 10.3
EEM-6: Replace Aerators $1,700 $0 ($12,300) ($10,600) 7.2
EEM-7: Insulate Storage Space Walls $6,200 $0 ($27,300) ($21,100) 4.4
EEM-8: Optimize AHU-1 (Apparatus Bay) $56,800 $2,900 ($179,900) ($120,200) 3.1
Medium Priority
EEM-9: Install Boiler Room Heat Recovery $28,400 $4,600 ($62,500) ($29,500) 2.0
EEM-10: Upgrade AHU-3 Motor $1,100 $0 ($2,000) ($900) 1.8
EEM-11: Optimize AHU-2 (Library) $28,400 $1,900 ($49,500) ($19,200) 1.7
EEM-12: Replace Penthouse Dorm Windows $7,500 $0 ($8,425) ($925) 1.1
$131,200 $11,800 ($375,025) ($232,025) 2.8
*The analysis is based on each EEM being independent of the others. While it is likely that some
EEMs are interrelated, an isolated analysis is used to demonstrate the economics because the audit
team is not able to predict which EEMs an Owner may choose to implement. If several EEMs are
implemented, the resulting energy savings is likely to differ from the sum of each EEM projection.
Douglas Fire Hall and Library 3 Energy Audit (November 2011)
Summary
The energy audit revealed numerous opportunities for improving the energy performance of the
building. It is recommended that the behavioral and high priority EEMs be implemented now to
generate energy savings from which to fund the medium priority EEMs.
Another avenue to consider is to borrow money from AHFCs revolving loan fund for public
buildings. AHFC will loan money for energy improvements under terms that allow for paying back
the money from the energy savings. More information on this option can be found online at
http://www.ahfc.us/loans/akeerlf_loan.cfm.
Douglas Fire Hall and Library 4 Energy Audit (November 2011)
Section 2
Introduction
This report presents the findings of an energy audit of Douglas Fire Station and Library located in
Douglas, Alaska. The purpose of this investment grade energy audit is to evaluate the infrastructure
and its subsequent energy performance to identify applicable energy efficiencies measures (EEMs).
The energy audit report contains the following sections:
Introduction: Building use and energy consumption.
Energy Efficiency Measures: Priority ranking of the EEMs with a description, energy analysis,
and life cycle cost analysis.
Description of Systems: Background description of the building energy systems.
Methodology: Basis for how construction and maintenance cost estimates are derived and the
economic and energy factors used for the analysis.
BUILDING USE
The Douglas Fire Station and Library is a 14,530 square foot building that contains the fire station
and support rooms, living quarters in the penthouse dorm spaces, library, meeting rooms, storage, and
mechanical support spaces. The building is used in the following manner:
Library: 2:00 pm – 8 pm (M-W), 11:00 am – 5:00 pm (Th), 1:00 pm – 5:00 pm (F-Su)
One staff and a maximum of approximately 40 visitors per day .
Fire Hall: This is an unstaffed station with approximately 25 volunteer firefighters.
Firefighters may be present at any time for training or operational needs.
Dorm: Up to six volunteer firefighters live in the dormitory.
Building History
1986 – Original construction
2006 – Replacement of cedar shake roofing
Douglas Fire Hall and Library 5 Energy Audit (November 2011)
Energy and Water Consumption
The building energy sources include an electric service and a fuel oil tank. Fuel oil is used for the
majority of the heating loads while electricity serves all other loads, including domestic hot water and
a limited amount of space heating. The following table shows annual energy use and cost.
Annual Energy Consumption and Cost
Source Consumption Cost Energy, MMBtu
Electricity 153,680 kWh $16,100 520 28%
Fuel Oil 9,768 Gallons $33,400 1,330 72%
Totals - $49,500 1,850 100%
Electricity
This chart shows electrical energy use from 2007 to 2010. Electricity use dropped in May 2008 when
electric rates increased temporarily due to an avalanche. The avalanche disrupted power from
Juneau’s primary hydroelectric generation facility, causing the utility to generate power with more
expensive diesel generators.
Conservation efforts put
into effect after the
avalanche have caused
post-avalanche use to be
less. There has been a
slight upward trend in
energy use but the use is
still mostly below pre-
avalanche levels.
The effective cost—
energy costs plus demand
charges—is 10.5¢ per
kWh.
Douglas Fire Hall and Library 6 Energy Audit (November 2011)
Fuel Oil
This chart shows heating
energy use from 2007 to
2010. The chart compares
annual use with the heating
degree days which is a
measurement of the
demand for energy to heat
a building. A year with a
higher number of degree
days reflects colder outside
temperatures and a higher
heating requirement.
Annual fuel oil use has varied by less than 10% over the past four years.
Water
Water consumption
averages 182,000
gallons per year. The
variations are likely
due to use by the fire
department.
The current cost of fuel oil (August 2011) is $3.23 per gallon. Assuming a fuel oil
conversion efficiency of 70% and an electric boiler conversion efficiency of 95%, oil
heat at $3.23 per gallon cost $35.28 per MMBtu. Electric heat at 10.1¢ per kWh and
95% efficiency costs $32.33 per MMBtu. As such, electric heat is less expensive than
fuel oil heat.
Douglas Fire Hall and Library 7 Energy Audit (November 2011)
Section 3
Energy Efficiency Measures
The following energy efficiency measures (EEMs) were identified during the energy audit. The
EEMs are priority ranked and, where applicable, subjected to energy and life cycle cost analysis.
Appendix A contains the energy and life cycle cost analysis spreadsheets.
The EEMs are grouped into the following prioritized categories:
Behavioral or Operational: EEMs that require minimal capital investment but require operational
or behavioral changes. The EEMs provide a life cycle savings but an analysis is not performed
because the guaranteed energy savings is difficult to quantify.
High Priority: EEMs that require a small capital investment and offer a life cycle savings. Also
included in this category are higher cost EEMs that offer significant life cycle savings.
Medium Priority: EEMs that require a significant capital investment to provide a life cycle
savings. Many medium priority EEMs provide a high life cycle savings and offer substantial
incentive to increase investment in building energy efficiency.
Low Priority: EEMs that will save energy but do not provide a life cycle savings.
BEHAVIORAL OR OPERATIONAL
This EEM is recommended for implementation. It requires behavioral or operational changes that can
occur with minimal investment to achieve immediate savings. It is not easily quantified by analysis
because it cannot be accurately predicted. It is recommended because it offers a life cycle savings,
represent good practice, and is an accepted feature of high performance buildings.
EEM-1: Weather-strip Doors
Purpose: Energy will be saved if man doors and overhead shop doors to the Fire Hall are
properly weather-stripped to reduce infiltration.
Scope: Replace weather stripping on all doors.
Douglas Fire Hall and Library 8 Energy Audit (November 2011)
HIGH PRIORITY
The following EEMs are recommended for implementation because they are low cost measures that
have a high savings to investment ratio. The EEMs are listed from highest to lowest priority. Negative
values, in parenthesis, represent savings.
EEM-2: Reduce Entrance Temperature
Purpose: The main library arctic entryway cabinet unit heater thermostats are set at 65° F.
Energy will be saved if the setpoint for this space was lowered to 55° F.
Scope: Lower temperature set point from 65° F to 55° F for cabinet unit heaters in the
entryway spaces.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($460) ($460) $100 $0 ($13,100) ($13,000) 131.0
EEM-3: Adjust Lighting Photocell
Purpose: An exterior lighting load of approximately 2.5 kW remained on several hours longer
than necessary due to an improperly adjusted automatic photocell control. Energy will
be saved if the photocell control system is adjusted to control exterior light operation
hours properly.
Scope: Adjust photocell controls for proper exterior light operations.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$10 ($520) ($510) $200 $100 ($9,100) ($8,800) 45.0
EEM-4: Install Pipe Insulation
Purpose: A 10’ section of 1” and a 2’ section of ¾” domestic hot water pipe is uninsulated in the
boiler room. Energy will be saved if these sections of domestic hot water pipe are
optimally insulated.
Scope: Install insulation on uninsulated domestic hot water piping
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($80) ($80) $100 $0 ($1,400) ($1,300) 14.0
EEM-5: Perform a Boiler Combustion Test
Purpose: Operating the boiler with an optimum amount of excess air will improve combustion
efficiency. Annual cleaning followed by a combustion test is recommended.
Scope: Annually clean and perform a combustion test on the boiler.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$120 ($330) ($210) $700 $2,300 ($9,500) ($6,500) 10.3
Douglas Fire Hall and Library 9 Energy Audit (November 2011)
EEM-6: Replace Aerators
Purpose: Energy and water will be saved by replacing the lavatory aerators and showerheads
with low-flow models.
Scope: Replace lavatory aerators and showerheads with water-conserving models.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($700) ($700) $1,700 $0 ($12,300) ($10,600) 7.2
EEM-7: Insulate Storage Space Walls
Purpose: The basement storage space exterior walls are uninsulated 8” concrete with an
insulation value of R-2. Energy will be saved if these walls are insulated with 4” of
foam from the inside.
Scope: Add 4” of foam insulation to the building exterior walls in the storage space.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($960) ($960) $6,200 $0 ($27,300) ($21,100) 4.4
EEM-8: Optimize AHU-1 (Apparatus Bay)
Purpose: The Apparatus Bay ventilation system maintains constant flow and over-ventilates even
though the space is unoccupied most of the time. This design does not allow the
building systems to ramp down during periods of reduced demand and/or reduced
occupancy. Energy will be saved if the building ventilation air systems varied air flow
and outside air with space requirements.
Scope: Optimize AHU-1 by adding a VFD with CO and CO2 sensors to vary outside air flow,
with a minimum ventilation rate of 400 cfm.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$150 ($6,600) ($6,450) $56,800 $2,900 ($179,900) ($120,200) 3.1
Douglas Fire Hall and Library 10 Energy Audit (November 2011)
MEDIUM PRIORITY
Medium priority EEMs will require planning and a higher level of investment. They are
recommended because they offer a life cycle savings. The EEMs are listed from highest to lowest
priority. Negative values, in parenthesis, represent savings.
EEM-9: Install Boiler Room Heat Recovery
Purpose: Heat is generated within the boiler room space due to boiler, domestic hot water heater,
and piping losses. Energy will be saved if this heat is captured and transferred to the
Apparatus Bay.
Scope: Install a heat recovery unit in the boiler room space and supply the air to the Apparatus
Bay.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$240 ($2,040) ($1,800) $28,400 $4,600 ($62,500) ($29,500) 2.0
EEM-10: Upgrade AHU-3 Motor
Purpose: Premium efficiency motors are not installed in all equipment in the facility. Energy will
be saved if the AHU-3 motor is replaced with a premium efficiency motor.
Scope: Replace the AHU-3 motor with a premium efficiency motor.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($110) ($110) $1,100 $0 ($2,000) ($900) 1.8
EEM-11: Optimize AHU-2 (Library)
Purpose: The Library ventilation system is controlled to provide a 55° F mixed air temperature,
which over-ventilates most of the time. This design does not allow the building systems
to ramp down during periods of reduced occupancy. Energy will be saved if the outside
air supplied by AHU-2 varies with occupancy through the use of a CO2 sensor.
Scope: Optimize AHU-2 by installing a CO2 sensor to vary outside air flow, with a minimum
ventilation rate of 400 cfm.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$100 ($1,750) ($1,650) $28,400 $1,900 ($49,500) ($19,200) 1.7
Douglas Fire Hall and Library 11 Energy Audit (November 2011)
EEM-12: Replace Penthouse Dorm Windows
Purpose: The north and east penthouse dorm room windows are single pane wood framed units
with interior removable storm windows. The resultant insulation value is
approximately R-1.25. Energy will be saved if these windows are replaced with energy
efficient units having an insulation value of at least R-3.
Scope: Replace windows with more energy efficient units.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($300) ($300) $7,500 $0 ($8,425) ($925) 1.1
LOW PRIORITY
Low priority EEMs do not offer a life cycle energy savings and are not recommended. Negative
values, in parenthesis, represent savings.
EEM-13: Upgrade Exterior Lighting to LED
Purpose: The existing perimeter and parking lot lighting consists of high pressure sodium
fixtures. These fixture styles are less efficient than LED lighting and the lamp life is
much shorter.
Scope: Replace these existing exterior lights with LED lights.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
($480) ($440) ($920) $36,900 ($9,300) ($7,600) $20,000 0.5
EEM-14: Install Domestic Hot Water Heat Pump
Purpose: Heat is generated within the boiler room space due to boiler and domestic hot water
heater operations. Efforts to capture this heat and use it to heat domestic hot water
would actually cost more energy than was saved, yielding a negative SIR value.
Scope: Install a heat pump to in the boiler room to utilize additional space heat for heating
domestic hot water.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 $450 $450 $21,300 $3,400 $7,900 $32,600 -0.5
EEM-15: Reduce Parking Stumble Lights
Purpose: During daylight hours, more light fixtures remain on than are needed for circulation. 5
of the 17 parking lot lights remained on after the photocell was activated. Energy could
be saved if this number was reduced from 5 to 2.
Scope: Reduce the number of parking garage stumble lights from 5 to 2. No detailed analysis
was prepared for this EEM as it requires access above the parking garage ceiling to
rewire the fixtures. This is cost prohibitive.
Douglas Fire Hall and Library 12 Energy Audit (November 2011)
Section 4
Description of Systems
ENERGY SYSTEMS
This section provides a general description of the building systems. Energy conservation
opportunities are addressed in the Energy Efficiency Measure section of the report.
Building Envelope
The following table summarizes the existing envelope.
Building Envelope
R-value
Component Description (inside to outside) Existing Optimal
Exterior Walls 5/8” Gyp. Bd, 6” steel studs, R-19 batt, 4” brick R-9 R-26
Below Grade Walls 8” concrete R-25 R-20
Storage Space Walls 8” concrete R-1 R-26
Roof 5/8” Gyp. Bd, steel truss, 4” concrete pan deck, 5” EPS insulation R-25 R-46
Floor Slab 6” Concrete slab-on-grade R-10 R-10
Perimeter 2” foam insulated concrete footing R-10 R-15
Windows – 1st Floor Aluminum; double pane R-2.0 R-5
Windows - Dorm Wood frame single pane with storm window R-1.5 R-5
Doors Metal frame w/o thermal break R-2 R-5
Heating System
The building is heated by one fuel oil boiler that provides heat to three air handling unit systems and
local hydronic units. The heating system has the following pumps:
P-1 circulates heating water to the AHU heating coils
P-2 circulates heating water to main floor
P-3 circulates heating water to the upper floor and main floor north end
P-4 circulates heating water to the main floor south end
P-5 circulates domestic hot water from the boiler room water heater
Douglas Fire Hall and Library 13 Energy Audit (November 2011)
Ventilation Systems
The following table summarizes the ventilation systems in the building.
Ventilation Systems
Area Fan System Description
Meeting Room AHU-1 Constant volume air handling unit consisting of a mixing box, filter
section, heating coil, and a supply fan
Library AHU-2 Constant volume air handling unit consisting of a mixing box, filter
section, heating coil, and a supply fan
Fire Hall AHU-3 Constant volume air handling unit consisting of a mixing box, filter
section, heating coil, and a supply fan
Domestic Hot Water System
Two electric hot water heaters supply fixtures in each of the spaces. The library and penthouse dorms
are served by a 100-gallon unit located in the boiler room. The fire hall is served by a 10-gallon unit
located on the upper mezzanine weight room area. The water conservation efficiency of the lavatory
aerators and the showerheads can be improved to reduce building hot water demand.
Lighting
Interior lighting consists primarily of incandescent and T12 fluorescent fixtures and is controlled
manually. Exterior lighting consists primarily of high pressure sodium fixtures. The exterior lighting
utilizes both manual switching and photocell controls.
Electric Equipment
Kitchen equipment is located in the penthouse dorms. Multiple small kitchen appliances are located
throughout the building. These include refrigerators, microwaves and stoves.
Douglas Fire Hall and Library 14 Energy Audit (November 2011)
Section 5
Methodology
Information for the energy audit was gathered through on-site observations, review of construction
documents, and interviews with operation and maintenance personnel. The EEMs are evaluated using
energy and life cycle cost analyses and are priority ranked for implementation.
Energy Efficiency Measures
Energy efficiency measures are identified by evaluating the building’s energy systems and comparing
them to systems in modern, high performance buildings. The process for identifying the EEMs
acknowledges the realities of an existing building that was constructed when energy costs were much
lower. Many of the opportunities used in modern high performance buildings—highly insulated
envelopes, variable capacity mechanical systems, heat pumps, daylighting, lighting controls, etc.—
simply cannot be economically incorporated into an existing building.
The EEMs represent practical measures to improve the energy efficiency of the buildings, taking into
account the realities of limited budgets. If a future major renovation project occurs, additional EEMs
common to high performance buildings should be incorporated.
Life Cycle Cost Analysis
The EEMs are evaluated using life cycle cost analysis which determines if an energy efficiency
investment will provide a savings over a 25-year life. The analysis incorporates construction,
replacement, maintenance, repair, and energy costs to determine the total cost over the life of the
EEM. Future maintenance and energy cash flows are discounted to present worth using escalation
factors for general inflation, energy inflation, and the value of money. The methodology is based on
the National Institute of Standards and Technology (NIST) Handbook 135 – Life Cycle Cost
Analysis.
Life cycle cost analysis is preferred to simple payback for facilities that have long—often perpetual—
service lives. Simple payback, which compares construction cost and present energy cost, is
reasonable for short time periods of 2-4 years, but yields below optimal results over longer periods
because it does not properly account for the time value of money or inflationary effects on operating
budgets. Accounting for energy inflation and the time value of money properly sums the true cost of
facility ownership and seeks to minimize the life cycle cost.
Construction Costs
The cost estimates are derived based on a preliminary understanding of the scope of each EEM as
gathered during the walk-through audit. The construction costs for in-house labor are $60 per hour for
work typically performed by maintenance staff and $110 per hour for contract labor.
The cost estimate assumes the work will be performed as part of a larger renovation or energy
efficiency upgrade project. When implementing EEMs, the cost estimate should be revisited once the
scope and preferred method of performing the work has been determined. It is possible some EEMs
will not provide a life cycle savings when the scope is finalized.
Douglas Fire Hall and Library 15 Energy Audit (November 2011)
Maintenance Costs
Maintenance costs are based on in-house or contract labor using historical maintenance efforts and
industry standards. Maintenance costs over the 25-year life of each EEM are included in the life cycle
cost calculation spreadsheets and represent the level of effort to maintain the systems.
Energy Analysis
The energy performance of an EEM is evaluated within the operating parameters of the building. A
comprehensive energy audit would rely on a computer model of the building to integrate building
energy systems and evaluate the energy savings of each EEM. This investment grade audit does not
utilize a computer model, so energy savings are calculated with factors that account for the dynamic
operation of the building. Energy savings and costs are estimated for the 25-year life of the EEM
using appropriate factors for energy inflation.
Prioritization
Each EEM is prioritized based on the life cycle savings to investment ratio (SIR) using the following
formula:
Prioritization Factor = Life Cycle Savings / Capital Costs
This approach factor puts significant weight on the capital cost of an EEM, making lower cost EEMs
more favorable.
Economic Factors
The following economic factors are significant to the findings.
Nominal Interest Rate: This is the nominal rate of return on an investment without regard to
inflation. The analysis uses a rate of 5%.
Inflation Rate: This is the average inflationary change in prices over time. The analysis uses an
inflation rate of 2%.
Economic Period: The analysis is based on a 25-year economic period with construction
beginning in 2010.
Fuel Oil
Fuel oil currently costs $3.20 per gallon for a seasonally adjusted blend of #1 and #2 fuel oil. The
analysis is based on 6% fuel oil inflation which has been the average for the past 20-years.
Douglas Fire Hall and Library 16 Energy Audit (November 2011)
Electricity
Electricity is supplied by Alaska Electric Light & Power Company (AEL&P). The building is billed
for electricity under AEL&P’s Rate 21D, Small Government with Demand. This rate charges for both
electrical consumption (kWh) and peak electric demand (kW). Electrical consumption is the amount
of energy consumed and electric demand is the rate of consumption. AEL&P determines the electric
demand by averaging demand over a continuously sliding fifteen minute window. The highest fifteen
minute average during the billing period determines the peak demand. The following table lists the
electric charges, which include a recent 24% rate hike:
AEL&P Small Government Rate with Demand
Charge 1 On-peak (Nov-May) Off-peak (June-Oct)
Energy Charge per kWh 6.43¢ 5.70¢
Demand Charge per kW $12.32 $8.24
Service Charge per month $27.16 $27.16
Over recent history, electricity inflation has been less than 1% per year, which has lagged general
inflation. An exception is the 24% rate hike that was primarily due to construction of additional
hydroelectric generation at Lake Dorothy. This project affords the community a surplus of power
which should bring electric inflation back to the historic rate of 1% per year. Load growth from
electric heat conversions is likely to increase generating and distribution costs, especially if diesel
supplementation is needed. Combining these two factors contribute to an assumed electricity inflation
rate of 3%.
Summary
The following table summarizes the energy and economic factors used in the analysis.
Summary of Economic and Energy Factors
Factor Rate or Cost Factor Rate or Cost
Nominal Discount Rate 5% Electricity Current rates
General Inflation Rate 2% Electricity Inflation 2%
Fuel Oil Cost (2012) $3.42/gal Fuel Oil Inflation 6%
Douglas Fire Hall and Library 17 Energy Audit (November 2011)
Appendix A
Energy and Life Cycle Cost Analysis
Douglas Fire Hall and Library 18 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
Basis
Economic
Study Period (years) 25 Nominal Discount Rate 5%General Inflation 3%
Energy
2011 $/gal Fuel Inflation 2012 $/gal
Fuel Oil $3.23 6% $3.42
Electricity $/kWh (2011)$/kW (2011)Inflation $/kWh (2012)$/kW (2012)
w/ Demand Charges $0.061 $10.62 2% $0.062 $10.83
w/o Demand Charges $0.102 -2% $0.102 -
EEM-2: Reduce Entrance Temperature
Energy Analysis
Component Area R-value ΔT Hours MBH kBtu η boiler Gallons
Wall 100 1.5 -10 7,600 -0.7 -5,067 68%-54
Windows 108 1.5 -10 7,600 -0.7 -5,472 68%-58
Door 42 1.5 -10 7,600 -0.3 -2,128 68%-23
-1.7 -12,667 -134
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Turn down thermostat 0 1 LS $60 $60
Energy Costs
Fuel Oil 1 - 25 -134 gal $3.42 ($13,052)
Net Present Worth ($13,000)
EEM-3: Adjust Lighting Photocell
Energy Analysis
Type # Fixtures Lamp Lamp, watts Fixture Watts Hours Savings, kWh
WallPak 4 MH 70 95 -2.5 -347
WallPak 19 MH 100 120 -2.5 -2,081
WallPak 36 MH 150 180 -2.5 -5,913
-8,340
Lamp Replacement
Type # Fixtures Lamp # Lamps Life, hrs Lamps//yr $/lamp
WallPak 4 MH 1 12,000 -0.30 $42
WallPak 19 MH 1 15,000 -1.16 $36
WallPak 36 MH 1 15,000 -2.19 $28
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Adjust photocell 0 1 LS $200 $200
Annual Costs
Existing lamp replacement, 70 watt MH 1 - 25 -0.30 lamps ($12.00)$70
Existing lamp replacement, 100 watt MH 1 - 25 -1.16 lamps ($6.00)$134
Existing lamp replacement, 150 watt MH 1 - 25 -2.19 lamps $2.00 ($84)
Energy Costs
Electric Energy 1 - 25 -8,340 kWh $0.062 ($9,096)
Net Present Worth ($8,800)
Douglas Fire Hall and Library 19 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-4: Install Pipe Insulation
Energy Analysis
Service Size Length Bare BTUH Insul BTUH Factor kBtu kWh
DHW 0.75 2 25 4 100% -368 -108
DHW 1.00 10 31 5 100% -2,278 -668
-775
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Pipe Insulation 3/4"0 2 lnft $5 $10
1"0 10 lnft $6 $60
Energy Costs
Electric Energy (Effective Cost)1 - 25 -775 kWh $0.102 ($1,392)
Net Present Worth ($1,300)
EEM-5: Perform Boiler Combustion Test
Energy Analysis
Annual Gal % Savings Savings, Gal
9,770 -1.0% -98
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Purchase combustion analyzer 0 1 LS $700 $700
Annual Costs
Combustion test 1 - 25 2 hrs $60.00 $2,314
Energy Costs
Fuel Oil 1 - 25 -98 gal $3.42 ($9,481)
Net Present Worth ($6,500)
EEM-6: Replace Aerators
Energy Analysis
Fixture Existing Proposed Uses/day Days Water,Gals % HW kBTU kWh
Showerhead 20.0 10.0 6 365 -21,900 80% -11,689 -3,426
Lavatories 0.3 0.2 75 312 -4,212 80% -2,248 -659
-26,112 -4,085
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace lavatory aerators 0 36 ea $35 $1,260
Replace showerhead 0 12 ea $35 $420
Energy Costs
Water 1 - 25 -26 kgals $10.960 ($5,016)
Electric Energy (Effective Cost)1 - 25 -4,085 kWh $0.102 ($7,332)
Net Present Worth ($10,700)
Gallons per Use
Douglas Fire Hall and Library 20 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-7: Insulate Storage Space Walls
Energy Analysis
Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons
Wall 445 2 21 15 -3.0 -26,452 68%-281
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Install wall insulation 0 445 sqft $14 $6,230
Energy Costs
Fuel Oil 1 - 25 -281 gal $3.42 ($27,257)
Net Present Worth ($21,000)
EEM-8: Optimize AHU-1 (Apparatus Bay)
Energy Analysis
Ventilation Savings (BIN Analysis)
kBtu η boiler Gallons
-163,436 68% -1,735
Fan Savings
kWh
-6,384
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Install VFD and Motor, 2 HP 0 1 LS $12,000 $12,000
DDC Controls 0 1 LS $15,000 $15,000
Commissioning 0 1 LS $5,000 $5,000
Estimating contingency 0 15%$4,800
Overhead & profit 0 30% $11,040
Design fees 0 10%$4,784
Project management 0 8%$4,210
Annual Costs
Maintain VFD and Controls 1 - 25 1 LS $150.00 $2,892
Energy Costs
Water 1 - 25 kgals $10.960 $0
Electric Energy 1 - 25 0 kWh $0.062 $0
Electric Demand 1 - 25 0 kW $10.83 $0
Electric Energy (Effective Cost)1 - 25 -6,384 kWh $0.102 ($11,458)
Fuel Oil 1 - 25 -1,735 gal $3.42 ($168,409)
Net Present Worth ($120,100)
Douglas Fire Hall and Library 21 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-9: Install Boiler Room Heat Recovery
Energy Analysis
Heat Recovery
Boiler gph Jacket Loss MBH Hours Loss, kBtu Factor Recovery, kBtu η boiler Gallons
14 -1.0% -19 8,760 -169,856 40% -67,943 68%-721
Fan Energy
MBH ΔT CFM ΔP η, fan # Fans Hours kW kWh
19 25 718 1.50 35%2 7,500 0.7 5,416
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
700 CFM HRV 0 1 LS $4,000 $4,000
Ductwork 0 1 LS $10,000 $10,000
Electrical 0 1 LS $2,000 $2,000
Estimating contingency 0 15%$2,400
Overhead & profit 0 30%$5,520
Design fees 0 10%$2,392
Project management 0 8%$2,105
Annual Costs
HRV maintenance 1 - 25 4 hrs $60.00 $4,628
Energy Costs
Electric Energy 1 - 25 5,416 kWh $0.062 $5,907
Electric Demand 1 - 25 8.7 kW $10.83 $1,645
Fuel Oil 1 - 25 -721 gal $3.42 ($70,010)
Net Present Worth ($29,400)
EEM-10: Upgrade AHU-3 Motor
Energy Analysis
Equip Number HP ηold ηnew kW Hours kWh
AHU-3 1 3 82.0% 89.5% -0.17 8,760 -1,470
-0.2 -1,470
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs HP
Replace motor 3 0 1 LS 1,080 $1,080
Energy Costs
Electric Energy 1 - 25 -1,470 kWh $0.062 ($1,604)
Electric Demand 1 - 25 -2 kW $10.83 ($382)
Electric Energy (Effective Cost)1 - 25 kWh $0.102 $0
Net Present Worth ($900)
Douglas Fire Hall and Library 22 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-11: Optimize AHU-2 (Library)
Energy Analysis
Ventilation Savings (BIN Analysis)
kBtu η boiler Gallons
-48,041 68% -510
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
CO2 sensor control of mixed air dampers 0 1 LS $12,000 $12,000
Commissioning 0 1 LS $4,000 $4,000
Estimating contingency 0 15%$2,400
Overhead & profit 0 30%$5,520
Design fees 0 10%$2,392
Project management 0 8%$2,105
Annual Costs
Maintain Controls 1 - 25 1 LS $100.00 $1,928
Energy Costs
Fuel Oil 1 - 25 -510 gal $3.42 ($49,503)
Net Present Worth ($19,200)
EEM-12: Replace Penthouse Dorm Windows
Energy Analysis
Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons
Windows 100 1.25 3.0 20 -0.9 -8,176 68%-87
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace window glazing unit 0 100 sqft $75 $7,500
Energy Costs
Fuel Oil 1 - 25 -87 gal $3.42 ($8,425)
Net Present Worth ($900)
Douglas Fire Hall and Library 23 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-13: Upgrade Exterior Lighting to LED
Energy Analysis
Type # Fixtures Lamp Lamp, watts Fixture Watts Lamp Lamp, watts Fixture Watts Savings, kWh
WallPak 4 MH 70 95 LED -40 -964
WallPak 19 MH 50 60 LED -29 -2,580
WallPak 36 MH 35 42 LED -20 -3,469
-7,012
Lamp Replacement
Type # Fixtures Lamp Watts # Lamps Life, hrs Lamps//yr $/lamp
WallPak 4 MH 70 -1 12,000 -1.46 $42
WallPak 19 MH 50 -1 15,000 -5.55 $36
WallPak 36 MH 35 -1 15,000 -10.51 $28
WallPak 4 LED 40 1 60,000 0.29 $125
WallPak 19 LED 29 1 60,000 1.39 $115
WallPak 36 LED 20 1 60,000 2.63 $105
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace WallPak: 70 watt MH with LED 0 4 LS $625 $2,500
Replace WallPak: 100 watt MH with LED 0 19 LS $625 $11,875
Replace WallPak: 150 watt MH with LED 0 36 LS $625 $22,500
Annual Costs
Existing lamp replacement, 70 watt MH 1 - 25 -1.46 lamps $72.00 ($2,027)
Existing lamp replacement, 100 watt MH 1 - 25 -5.55 lamps $66.00 ($7,061)
Existing lamp replacement, 150 watt MH 1 - 25 -10.51 lamps $58.00 ($11,757)
LED board replacement, 40 watts 1 - 25 0.29 LED board $155.00 $873
LED board replacement, 50 watts 1 - 25 1.39 LED board $145.00 $3,878
LED board replacement, 35 watts 1 - 25 2.63 LED board $135.00 $6,841
Energy Costs
Electric Energy 1 - 25 -7,012 kWh $0.062 ($7,648)
Net Present Worth $20,000
Existing Replacement
Douglas Fire Hall and Library 24 Energy Audit (November 2011)
Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis
25200 Amalga Harbor Road Tel/Fax: 907.789.1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall and Library
EEM-14: Install Domestic Hot Water Heat Pump
Energy Analysis
Fixture Gal/use Uses/day Days Water,Gals % HW kBtu COP kWh
Showerhead 20.0 4 365 29,200 80% 15,586 4 3,426
Sinks 1.0 12 365 4,380 80% 2,338 4 514
Lavatories 0.2 75 365 4,106 80% 2,192 4 482
37,686 20,115 4,422
214
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Install DHW Heat Pump 0 1 LS $12,000 $12,000
Estimating contingency 0 15%$1,800
Overhead & profit 0 30%$4,140
Design fees 0 10%$1,794
Project management 0 8%$1,579
Energy Costs
Water 1 - 25 kgals $10.960 $0
Electric Energy 1 - 25 kWh $0.062 $0
Electric Demand 1 - 25 kW $10.83 $0
Electric Energy (Effective Cost)1 - 25 4,422 kWh $0.102 $7,936
Fuel Oil 1 - 25 gal $3.42 $0
Net Present Worth $29,200
Douglas Fire Hall and Library 25 Energy Audit (November 2011)
Appendix B
Energy and Utility Data
Douglas Fire Hall and Library 26 Energy Audit (November 2011)
Alaska Energy Engineering LLC Billing Data
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall/Library
ELECTRIC RATE
Electricity ($ / kWh )0.0665 0.0589
Demand ( $ / kW )12.73 8.52
Customer Charge ( $ / mo )27.16 27.16
Sales Tax ( % )0.0% 0.0%
ELECTRICAL CONSUMPTION AND DEMAND
kWh kW kWh kW kWh kW kWh kW
Jan 13,640 42.0 13,480 39.6 13,360 42.4 13,720 48.0 13,550
Feb 12,400 40.8 13,800 41.6 12,280 41.2 14,080 45.2 13,140
Mar 12,880 38.4 14,000 40.8 12,800 41.2 12,600 42.4 13,070
Apr 14,000 42.4 11,840 39.6 11,120 39.6 12,920 42.4 12,470
May 12,840 38.0 8,880 35.2 12,000 34.0 13,240 41.6 11,740
Jun 13,000 38.4 9,720 32.4 12,240 37.2 11,640 41.2 11,650
Jul 14,480 44.8 10,520 32.8 11,680 38.4 12,000 39.2 12,170
Aug 13,400 40.4 10,840 36.4 11,840 37.6 12,400 39.2 12,120
Sep 14,560 40.8 11,560 34.0 13,480 38.4 12,200 38.4 12,950
Oct 13,000 38.8 12,000 38.8 12,640 38.8 13,680 42.4 12,830
Nov 14,520 40.0 11,960 39.6 15,160 42.0 14,200 48.0 13,960
Dec 14,600 42.4 13,200 42.4 14,840 42.0 13,480 42.4 14,030
Total 163,320 141,800 153,440 156,160 153,680
Average 13,610 41 11,817 38 12,787 39 13,013 43 12,807
Load Factor 45.9%42.9%44.5%41.9%40
ELECTRIC BILLING DETAILS
Month Energy Demand Cust & Tax Total Energy Demand Cust & Tax Total % Change
Jan 888 540 27 1,455 912 611 27 1,551 6.5%
Feb 817 524 27 1,368 936 575 27 1,539 12.5%
Mar 851 524 27 1,403 838 540 27 1,405 0.1%
Apr 739 504 27 1,271 859 540 27 1,426 12.2%
May 798 433 27 1,258 880 530 27 1,437 14.2%
Jun 814 317 27 1,158 774 351 27 1,152 -0.5%
Jul 777 327 27 1,131 798 334 27 1,159 2.5%
Aug 787 320 27 1,135 825 334 27 1,186 4.5%
Sep 896 327 27 1,251 811 327 27 1,166 -6.8%
Oct 841 331 27 1,198 910 361 27 1,298 8.3%
Nov 1,008 535 27 1,570 944 611 27 1,583 0.8%
Dec 987 535 27 1,549 896 540 27 1,463 -5.5%
Total $ 10,204 $ 5,217 $ 326 $ 15,747 $ 10,385 $ 5,654 $ 326 $ 16,364 3.9%
Average $ 850 $ 435 $ 27 $ 1,312 $ 865 $ 471 $ 27 $ 1,364 3.9%
Cost ($/kWh)$0.103 63% 35% 2% $0.105 2.1%
Electrical costs are based on the current electric rates.
2009 2010
2010
AEL&P Electric Rate 21 On-Peak
Nov-May
Off-peak
Jun-Oct
Month 2007 2008 2009 Average
Douglas Fire Hall and Library 27 Energy Audit (November 2011)
Alaska Energy Engineering LLC Annual Electric Consumption
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall/Library
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Use (kWh)Month of the Year
Electric Use History
2007
2008
2009
2010
0
10
20
30
40
50
60
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Demand (kW)Month of the Year
Electric Demand History
2007
2008
2009
2010
Douglas Fire Hall and Library 28 Energy Audit (November 2011)
Alaska Energy Engineering LLC Electric Cost
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall/Library 2010
$ 0
$ 200
$ 400
$ 600
$ 800
$ 1,000
$ 1,200
$ 1,400
$ 1,600
$ 1,800
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Cost (USD)Month of the Year
Electric Cost Breakdown
2010
Electric Use (kWh) Costs
Electric Demand (kW) Costs
Customer Charge and Taxes
0.0
10.0
20.0
30.0
40.0
50.0
60.0
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Electric Demand (kW)Electric Use (kWh)Month of the Year
Electric Use and Demand Comparison
2010
Electric Use
Electric Demand
Douglas Fire Hall and Library 29 Energy Audit (November 2011)
Alaska Energy Engineering LLC Annual Fuel Oil Consumption
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall/Library
Year Fuel Oil Degree Days
2007 10,464 9,282 107%
2008 10,811 9,093 111%
2009 9,120 9,284 93%
2010 8,678 9,013 89%
9,768
5,000
6,000
7,000
8,000
9,000
10,000
0
2,000
4,000
6,000
8,000
10,000
12,000
2007 2008 2009 2010 Degree DaysGallons of Fuel OilYear
Annual Fuel Oil Use
Fuel Oil
Degree Days
Douglas Fire Hall and Library 30 Energy Audit (November 2011)
Alaska Energy Engineering LLC Annual Water Consumption
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Douglas Fire Hall/Library
Year Water
2007 72,000
2008 144,000
2009 120,000
2010 180,000
0
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
2007 2008 2009 2010Gallons of WaterYear
Annual Water Use
Douglas Fire Hall and Library 31 Energy Audit (November 2011)
Alaska Energy Engineering LLC Billing Data
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Annual Energy Consumption and Cost
Energy Cost $/MMBTU Area ECI EUI
Fuel Oil $3.42 $35.28 14,530 $3.41 127
Electricity $0.105 $32.33
Source Cost
Electricity 153,680 kWh $16,100 520 28%
Fuel Oil 9,768 Gallons $33,400 1,330 72%
Totals -$49,500 1,850 100%
Annual Energy Consumption and Cost
Consumption Energy, MMBtu
Douglas Fire Hall and Library 32 Energy Audit (November 2011)
Appendix C
Equipment Data
Douglas Fire Hall and Library 33 Energy Audit (November 2011)
MotorHP / Volts / RPM / EfficA Mechanical Room BoilerWeil McLain H-788 WS 1632 MBHBurnerCarlin 801 CRD 11.4-19.8 GPMH AHU -1, Mechnical Rm Meeting Room Ventilation Pace A-11FCSI 2900 CFMBurner MotorMarathon7/4 HP/ 115 V/ 98I AHU-2, Mechnical Rm Library Ventilation Pace1000 CFM 1 1/4 HP/ 1455 RPMMotorCentury H582J AHU-3 Mechanical Rm Fire Hall Ventilation Pace A12-4C-SI 4000 CFM PDomestic Hot Water A.O. Smith DSE10 10 GallonQDomestic Hot Water A.O. Smith DSE100 100 GallonRCeiling Exhaust Fan Pace300 CFM 1/10 HP/ 1050 RPMSCeiling Exhaust Fan Pace130 CFM 1/50 HP/ 1050 RPMTCeiling Exhaust Fan Pace100 CFM 1/50 HP/ 1050 RPMUCeiling Exhaust Fan Pace100 CFM 1/50 HP/ 1050 RPMVCeiling Exhaust Fan Pace150 CFM 1/50 HP/ 1050 RPMWCeiling Exhaust Fan Pace240 CFM 1/50 HP/ 1050 RPMXCeiling Exhaust Fan Pace100 CFM 1/50 HP/ 1050 RPMYRoot Exhaust2900 CFMZ Mechanical Room Air CompressorNational1/2 HP/ 115 V/ 9 Amp/ 64%Air Compressor3 HP/ 208 V/ 9 Amp/ 82%P-1 Mechanical Room Heat CoilGrundfos MPS 50-80-2F 81 GPM 115 V/5.85 AmpP-2 Mechanical Room Main FloorGrundfos UP43-75F 10 GPM 115 V/2.15 AmpP-3 Mechanical Room Upper, Main North Grundfos UP43-75 9 GPM 115 V/2.15 AmpP-4 Mechanical Room Main SouthGrundfos UMC50-40 42 GPM 115V/1.98 AmpP-5 Mechanical Room Hot WaterGrundfos UP15-42-5F 10 GPM 115 V/ 0.74 AmpMechanical Room Generator SetStanford125 KWMechanical Room Generator Set Motor Mitsubishi 6D-16-T1 1/2 HP/ 208 V/ 3 Phase/ 1725 RPM/ 78%8PA56C34D1252BP2 HP/ 200 V/ 7.4 A/ 1725 RPM/ 80%3/4 HP/ 208 V/ 1725 RPM/ 2.5 A3 HP/ 208 V/ 1725 RPM/ 82%6 KW/ 208 V/ 3 Phase15 KW/ 208 V/ 3 PhaseUnit IDLocation Function Make Model Capacity NotesDouglas Fire Hall and Library - Major Equipment InventoryDouglas Fire Hall and Library 34 Energy Audit (November 2011)
Appendix D
Abbreviations
AHU Air handling unit
BTU British thermal unit
BTUH BTU per hour
CBJ City and Borough of Juneau
CMU Concrete masonry unit
CO2 Carbon dioxide
CUH Cabinet unit heater
DDC Direct digital controls
DHW Domestic hot water
EAD Exhaust air damper
EEM Energy efficiency measure
EF Exhaust fan
Gyp Bd Gypsum board
HVAC Heating, Ventilating, Air-
conditioning
HW Hot water
HWRP Hot water recirculating pump
KVA Kilovolt-amps
kW Kilowatt
kWh Kilowatt-hour
LED Light emitting diode
MBH 1,000 Btu per hour
MMBH 1,000,000 Btu per hour
OAD Outside air damper
PSI Per square inch
PSIG Per square inch gage
RAD Return air damper
RF Return fan
SIR Savings to investment ratio
SF Supply fan
UV Unit ventilator
VAV Variable air volume
VFD Variable frequency drive
Douglas Fire Hall and Library 35 Energy Audit (November 2011)