HomeMy WebLinkAboutSEA-AEE-Metlakatla Activity Center 2012-EE
Lepquinum Wellness Center
Annette Island Service Unit
Funded by:
Final Report
December 2011
Prepared by:
Energy Audit
Table of Contents
Section 1: Executive Summary 2
Section 2: Introduction 6
Section 3: Energy Efficiency Measures 8
Section 4: Description of Systems 13
Section 5: Methodology 16
Appendix A: Energy and Life Cycle Cost Analysis 19
Appendix B: Electrical Data 25
Appendix C: Equipment Data 30
Appendix D: Abbreviations 34
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
Lepquinum Wellness Center 1 Energy Audit (December 2011)
Section 1
Executive Summary
An energy audit of the Lepquinum Wellness Center in Metlakatla 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 Lepquinum Wellness Center is a 23,296 square foot building that contains offices, commons,
locker rooms, a pool, a handball court, an activity space, storage, shop areas, a Native arts space, and
mechanical support spaces. The Activity Center portion of the facility is utilized by the Annette
Island Service Unit and the Annette Island School District still utilizes the lower classroom portions
of the building.
Building Assessment
The following summarizes our assessment of the building.
Envelope
The exterior of the building appears to have been fairly well maintained and should continue to
provide good service; however, we recommend that issues such as vertical drainage behind the finish
on the east wall, rusting door frames, and temporary repairs to the Dryvit siding are corrected with
permanent repairs before additional building envelope damage occurs.
The exterior doors are not thermally broken. Future exterior door replacement selection should
include this feature. Weather-stripping on exterior doors is in need of replacement throughout.
Paint and chemicals are being stored in the utilidor spaces in the basement. These spaces are not
vented and there is a potential for heavy fumes to build up, which is a code violation.
There is no arctic entry to the main lobby. This feature should be included on all buildings in this
climate as it significantly reduces the amount of outside air infiltration. Retrofitting an artic entry is
discussed in Energy Efficiency Measure (EEM) 13 in Section 3.
The exterior door to the automotive/welding spaces cannot be opened from the outside without a key.
As a result, during classroom hours the door must be propped open to provide students continual
access throughout the school day. This results in an unnecessary heat loss that can be fixed simply by
replacing the existing door operator.
The Kalwall translucent daylight system fiberglass window wall at the peak of the building provides
approximately an R-4 insulation value, yet it covers 300 square feet of wall section at the very peak of
the pool area. There is considerable heat loss from the window wall, which provides minimal
daylighting of the space because the panels are clouded due to UV exposure.
The audit team was informed by maintenance staff that the pool deck drain is leaking and is the
source of water that is running along the basement ceiling in all spaces directly below the pool.
Exposure to chlorine pool water may have started the corrosion process, but it appears that the use of
salt in the pool water may have accelerated the damage. The audit team also witnessed the tripping of
a lighting circuit breaker as a result of water draining through the pan deck material and onto a
conduit in the west utilidor space.
Lepquinum Wellness Center 2 Energy Audit (December 2011)
Heating System
The building and the pool are heated by three fuel oil boilers that provide heat to seven air handling
unit systems, fan coil units, and perimeter hydronic systems. Given that Metlakatla’s hydroelectric-
generated electricity provides a much less expensive heat source then fuel oil, it was disappointing to
the audit team to learn that the original electric boilers had been replaced with oil-fired boilers.
At the time of the audit Boiler #1 was running and the remaining two boilers were on-line and not
isolated. Circulating heating water through an unnecessary boiler results in a significant amount of
heat loss. This is covered with recommendations in Section 3, EEM-4.
The remainder of the fuel oil boiler heating system appears to be in good condition. Fairly simple
improvements can be made to improve its effectiveness and efficiency. These are outlined in Section
3, Energy Efficiency Measures.
Ventilation System
The building ventilation systems consist of seven large air handling units, one return fan, and 11
exhaust fans. The overall condition of the systems is very poor as a result of a failed pneumatic
control system and a lack of maintenance. Issues include:
Broken drive belts on the 20 HP supply fan for S-1. The motor was running without any load
and return fan R-1 was pushing air through the supply fan.
The access door to S-5 mixing box was left open, resulting in the ventilation unit pulling
return air from the fan room adjacent to the pool instead of from the handball space it serves
Filters in most every unit are well beyond their useful life. In the case of S-3 the filters
observed were so dirty that they had collapsed and were lying inside the unit.
Natatorium
Staff install a cover over the swimming pool when it is not in use. This reduces pool heat loss and
humidity. It is commendable that the staff is diligent in using the cover.
Control System
A pneumatic system is installed to control the heating and ventilation system components. Most of
the control functions have failed throughout the building resulting in an inability to properly control
the space heating and ventilating equipment. Operators are manually controlling heating water flows
through air coils to maintain thermal comfort. Our observation is that most spaces are being
overheated.
The ventilation controls have failed on all air handling units. The ventilation dampers are positioned
to full recirculation mode which does not bring sufficient ventilation air into the building to makeup
exhaust air and supply adequate indoor air quality. As a result:
The building pressure is highly negative; outdoor air flows inward whenever a door is open.
The pool is inadequately ventilated and humidity levels are high.
Moist air is likely being drawn through the envelope, which can degrade the structure and
insulation systems.
We recommend that the pneumatic system be replaced with an electrically controlled system and the
building systems retro-commissioned.
Lepquinum Wellness Center 3 Energy Audit (December 2011)
Lighting
Interior lighting consists primarily of T12 and metal halide lighting. Exterior lighting consists
primarily of metal halide lighting. The interior lighting schedule and all exterior lighting is controlled
by staff. In the smaller spaces such as classrooms, occupancy sensors are recommended to ensure
lights are turned off (several unoccupied spaces were lit during the audit).
Summary
It is the assessment of the energy audit team that the majority of the building energy losses are due to
a failed pneumatic air handling control system, and heating system controls. This has resulted in a
situation that cannot be corrected by operational modifications alone.
A building optimization analysis is recommended in which the building systems are reconfigured and
optimized for the actual use. It is likely the number of systems can be reduced and the building set up
to operate more efficiently. The analysis should evaluate if there is incentive to reinstall electric
boilers to take advantage of favorable rates when there is low-cost hydroelectric power.
Replacement of the control system is a necessary step toward improving the indoor air quality,
thermal comfort, and energy efficiency of the building. Commissioning the building is needed to
ensure the systems operate properly and reduce the energy footprint of the building.
While a complete optimization analysis is beyond the scope of this energy audit, several EEMs show
that there is considerable financial incentive to replace the control system and install electric boilers.
Optimizing the systems will further improve the economics.
Energy Efficiency Measures (EEMs)
All buildings have opportunities to improve their energy efficiency. The energy audit revealed several
opportunities in which an efficiency investment will result in a net reduction in long-term operating
costs.
Behavioral and Operational EEMs
The following EEMs require behavioral and operational changes in the building use. The savings are
not readily quantifiable but these EEMs are highly recommended as low-cost opportunities that are a
standard of high performance buildings.
EEM-1: Weather-strip Doors
EEM-2: Turn Off Lighting
EEM-3: Proper Thermostat Setpoints
Lepquinum Wellness Center 4 Energy Audit (December 2011)
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-4: Isolate Standby Boilers $400 $16,300 ($151,700) ($135,000) 338.5
EEM-5: Perform Boiler Combustion Test $700 $15,000 ($64,700) ($49,000) 71.0
EEM-6: Replace Aerators and Showerheads $2,300 $0 ($32,600) ($30,300) 14.2
Medium Priority
EEM-7: Install Boiler Room Heat Recovery $25,800 $4,100 ($75,900) ($46,000) 2.8
EEM-8: Install Modulating Boiler Burners $63,900 $17,000 ($194,100) ($113,200) 2.8
EEM-9: Upgrade Components/Optimize HVAC $843,600 $17,000 ($2,040,700) ($1,180,100) 2.4
EEM-10: Upgrade Motors $2,200 $0 ($4,500) ($2,300) 2.0
EEM-11: Replace Single-Pane Glazing $6,000 $0 ($7,300) ($1,300) 1.2
EEM-12: Upgrade Transformer $20,900 $0 ($23,300) ($2,400) 1.1
Totals* 965,800 $69,400 ($2,594,800) ($1,559,600) 2.6
*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.
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.
Lepquinum Wellness Center 5 Energy Audit (December 2011)
Section 2
Introduction
This report presents the findings of an energy audit of the Lepquinum Wellness Center located in
Metlakatla, 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 Metlakatla Wellness Center is a 23,296 square foot building that contains offices, commons,
locker rooms, a pool, a handball court, an activity space, storage, shop areas, a Native arts space, and
mechanical support spaces.
The Wellness Center portion of the facility is used by the Annette Island Service Unit. The Wellness
Center facilities are visited by approximately 40 people daily, 50% of whom use the pool. From
February to May, swimming lessons are given through the school to approximately 100 students per
week. The facilities are also rented 3-4 times from August to May and closed for June and July.
The lower classroom portions of the building are used by the Annette Island School District. The
School Automotive and Welding Shop facilities are used full time during the school year and for 2
hours/day for a one-month period during the summer.
Operating hours are:
Pool: 6:00 am – 8:00 pm (M-F)
Shops: 8:00 am – 3:00 pm (M-F)
Building History
1982 – Original Construction
2002 – Electric boilers replaced with fuel oil boilers
Lepquinum Wellness Center 6 Energy Audit (December 2011)
Energy 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 and domestic hot water while electricity serves all other loads. The
following table shows annual energy use and cost.
Annual Energy Consumption and Cost
Source Consumption Cost Energy, MMBtu
Electricity 502,525 kWh $55,200 1,710 20%
Fuel Oil 49,500 Gallons $215,300 6,720 80%
Totals - $270,500 8,430 100%
Electricity
This chart shows electrical energy use
from 2007 to 2010. Electricity use has
been relatively consistent over the past
four years. Use drops in the summer when
the building is shutdown.
The effective cost—energy costs plus
demand charges—is 11.0¢ per kWh.
Fuel Oil
Fuel oil use has been consistent at 47,500 gallons per year.
Heating Comparison
The current cost of fuel oil in Metlakatla is $4.35
per gallon. Assuming a fuel oil conversion
efficiency of 70% and an electric boiler
conversion efficiency of 95%, oil heat at $4.35 per
gallon equates to $33.90 per MMBtu. Since the
current cost of electricity is 11.0¢ per kWh
which equates to $44.87 per MMBtu, fuel oil
heat is more expensive than electric heat.
Lepquinum Wellness Center 7 Energy Audit (December 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 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
The following EEMs are recommended for implementation. They require behavioral or operational
changes that can occur with minimal investment to achieve immediate savings. These EEMs are not
easily quantified by analysis because they cannot be accurately predicted. They are recommended
because they offer a life cycle savings, represent good practice, and are accepted features of high
performance buildings.
EEM-1: Weather-strip Doors
Purpose: The weather stripping on most of the exterior doors is in poor condition. Energy will be
saved if doors are properly weather-stripped to reduce infiltration.
Scope: Replace weather stripping on exterior doors.
EEM-2: Turn Off Lighting
Purpose: The lighting was found to be left on in several of the school areas of the building.
Energy will be saved if the staff is made aware of the need to turn off the lighting when
rooms are unoccupied.
Scope: Instruct staff on the importance of turning off the lighting when rooms are vacant.
Lepquinum Wellness Center 8 Energy Audit (December 2011)
EEM-3: Proper Thermostat Setpoints
Purpose: The temperature in many of the rooms was much higher than needed to control
humidity and provide thermal comfort. Until the control system is made operational,
energy will be saved if staff monitors temperatures and manually adjusts the heating
water flow as outdoor temperature varies.
Scope: Increase monitoring of the room temperatures and manually adjust the heating water
flow. Consideration should also be given to reducing the heating flow over the
weekends to all spaces, except the Natatorium which should remain warm to control
humidity.
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-4: Isolate Standby Boilers
Purpose: Only one boiler is needed to meet the heating load. The standby boilers are not isolated
from the heating system and remain hot. Circulating heating water through the standby
boilers results in jacket losses due to the standby boilers acting as a heat sink. Energy
will be saved by disabling and isolating the standby boilers.
Scope: Disable and isolate the standby boilers by closing the heating return isolation valve.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$960 ($5,350) ($4,390) $400 $16,300 ($151,700) ($135,000) 338.5
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
$880 ($2,280) ($1,400) $700 $15,000 ($64,700) ($49,000) 71.0
EEM-6: Replace Lavatory Aerators and Showerheads
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 fixtures.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($2,080) ($2,080) $2,300 $0 ($32,600) ($30,300) 14.2
Lepquinum Wellness Center 9 Energy Audit (December 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-7: Install Boiler Room Heat Recovery
Purpose: The boiler room utilizes inlet and outlet grills to exhaust air outside the space. Energy
will be saved if the heat generated from the boiler room is transferred to the welding
shop.
Scope: Install a heat recovery unit. Recirculate boiler room air on the hot side of the heat
recovery cell and welding room air on the cold side.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$240 ($2,460) ($2,220) $25,800 $4,100 ($75,900) ($46,000) 2.8
EEM-8: Install Modulating Boiler Burners
Purpose: The boiler burners do not incorporate modulating burner controls. Energy will be saved
if the boiler firing rate modulated as necessary.
Scope: Install modulating burners on the boilers.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$1,000 ($6,850) ($5,850) $63,900 $17,000 ($194,100) ($113,200) 2.8
Lepquinum Wellness Center 10 Energy Audit (December 2011)
EEM-9: Upgrade Components / Optimize HVAC Systems
Purpose: The building is currently operating inefficiently due to a failed control system. The
system must be replaced to regain control of the systems so there is good thermal
comfort and adequate indoor air quality. Energy will be saved if the systems are then
optimized.
Scope: Optimize the HVAV systems to decrease energy consumption while increasing thermal
comfort and maintaining adequate indoor air quality.
- Heating Plant: Install an electric boiler to take advantage of favorable electric
rates. Much of the electric distribution infrastructure is in-place from when the
building was electrically heated.
- Hydronic Heat Distribution: Convert the hydronic heating system to variable speed
pumping.
- Natatorium S-1: Reduce air flow during unoccupied periods; modulate ventilation
air with humidity levels; verify proper performance of the heat exchanger.
- Locker/Lobby S-2: Modulate air flow with humidity level; turn off during
unoccupied periods; verify proper performance of the heat exchanger.
- Wood/Machine S-3: Modulate air flow with cooling loads; modulate ventilation
air with occupancy; turn off during unoccupied periods.
- Handball Court S-6: Modulate air flow with cooling loads; modulate ventilation
air with occupancy; turn off during unoccupied periods.
- Activity Center S-7: Modulate air flow with cooling loads; modulate ventilation
air with occupancy; turn off during unoccupied periods.
- Controls: Replace the failed pneumatic control system with a DDC system. This is
essential to fully optimizing the building.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$1,000 ($64,120) ($63,120) $843,600 $17,000 ($2,040,700) ($1,180,100) 2.4
EEM-10: Upgrade Motors
Purpose: Equipment inspections identified two motors that are not operating efficiently.
Installing properly sized NEMA Premium motors will save energy.
Scope: Replace the pool pump motor and the return fan R-1 motor.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($290) ($290) $2,200 $0 ($4,500) ($2,300) 2.0
Lepquinum Wellness Center 11 Energy Audit (December 2011)
EEM-11: Replace Single-Pane Glazing
Purpose: Single-pane glazing exists in the east and west window entry window wall curtains and
in the east entry door. Energy will be saved if the single-pane glazing is removed and
replaced with energy efficient double-pane glazing.
Scope: Replace single-pane glazing with energy efficient double-pane glazing.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($260) ($260) $6,000 $0 ($7,300) ($1,300) 1.2
EEM-12: Upgrade Transformer
Purpose: The 150 kVA transformer in the electrical room is not TP-1 rated. Energy will be saved
if this less-efficient transformer is replaced with an energy efficient model that
complies with NEMA Standard TP 1-2001.
Scope: Replace less-efficient transformer with a NEMA Standard TP 1-2001compliant model.
Annual Costs Life Cycle Costs
Operating Energy Total Investment Operating Energy Total SIR
$0 ($1,480) ($1,480) $20,900 $0 ($23,300) ($2,400) 1.1
LOW PRIORITY
Low priority EEMs will not produce a life cycle savings and are not recommended.
EEM-13: Install Arctic Entrance
Purpose: Energy will be saved if the main entrance is converted to an arctic entrance.
Analysis: Arctic entrances require passage through two doors to enter/leave the building. With
sufficient distance between them, one door closes before the other opens, sealing the
entrance and reducing infiltration. Arctic entrances are a standard in high performance
buildings.
Previous analysis has shown that the cost of adding an arctic entrance with ADA door
operators will not be offset by energy savings. This EEM is not recommended.
Lepquinum Wellness Center 12 Energy Audit (December 2011)
Section 4
Description of Systems
ENERGY SYSTEMS
This section provides a general description of the building systems. Energy conservation
opportunities are addressed in Section 3, Energy Efficiency Measures.
Building Envelope
R-value
Component Description (inside to outside) Existing Optimal
Exterior Wall 1/2” Gyp. Bd, 2”x 6” wood studs w/ R-19 batt, 1/2” plywood,
2” polystyrene insulations, aggregate finish R-18 R-26
Roof 2” wood, 5” polystyrene insulation, ½” air, 1/2” plywood R-22 R-46
Floor Slab 4” Concrete slab-on-grade R-10 R-10
Foundation 8” concrete with 2” rigid insulation on exterior surface R-10 R-20
Windows vinyl double pane R-1.5 R-5
Doors Steel doors. Doors w/glazing were single pane. R-1.5 R-5
Heating System
The building and the pool are heated by three fuel oil boilers that provide heat to seven air handling
unit systems, fan coil units, and perimeter hydronic systems. The heating system has the following
pumps:
P-1 is a pool circulation pump
P-2 is a chlorination pump
P-3 is the 140°F domestic hot water circulation pump
P-4 is the tempered domestic hot water circulation pump
P-5 is the pool heating pump
P-6 is the domestic hot water heating pump
P-7 is the building heating pump
P-8 is the building heating pump
Lepquinum Wellness Center 13 Energy Audit (December 2011)
Ventilation Systems
Area Fan System Description
Natatorium S-1 Constant volume air handling unit consisting of a pre-heating
coil, heating coil, mixing box, filter section, and supply fan,
and a return fan
Locker Room/Lobby S-2 Constant volume air handling unit consisting of a pre-heating
coil, heating coil, mixing box, filter section, and supply fan,
and a return fan
Wood Shop/Machine Shop S-3 Constant volume air handling unit consisting of a heating coil,
filter section, and supply fan
Auto Shop/Hi-Bay S-4 Constant volume air handling unit consisting of a heating coil,
filter section, and supply fan
Welding S-5 Constant volume air handling unit consisting of a heating coil,
filter section, and supply fan
Handball S-6 Constant volume air handling unit consisting of a heating coil,
filter section, and supply fan
Activity Center S-7 Constant volume air handling unit consisting of a heating coil,
filter section, mixing box, and supply fan
Swimming Pool R-1 20,000 cfm return fan for S-1
Locker Room/Lobby EF-2 3,600 cfm 1 ½ HP exhaust fan
Locker Room/Lobby EF-3 6,000 cfm 3 HP exhaust fan
Welding EF-4 1,800 cfm ¾ HP
Welding EF-5 1,800 cfm ¾ HP
Sawdust System EF-6 2,600 cfm 10 HP exhaust fan
Auto/Hi-Bay EF-7 3,600 cfm 1 ½ HP exhaust fan
Spray Paint EF-8 1,500 cfm 1 HP exhaust fan
Toilets EF-9 800 cfm ¾ HP exhaust fan (belt was broken during inspection)
Finishing EF-10 1,500 cfm 1 HP exhaust fan
Snack Bar EF-11 800 cfm ¾ HP exhaust fan
Domestic Hot Water System
The domestic hot water heating system consists of two indirect tanks that supply domestic hot water
to the fixtures. The plumbing fixtures are not water-conserving types; replacement of lavatory
aerators and showerheads is recommended.
Automatic Control System
The building has a pneumatic control system that has reached the end of its service life. The system
has completely failed — none of the operators are working. The system requires substantial repair or,
preferably, a replacement with a direct digital control (DDC) system.
Lepquinum Wellness Center 14 Energy Audit (December 2011)
Lighting
Interior lighting consists primarily of T12 and metal halide lighting. Exterior lighting consists
primarily of metal halide lighting. The interior lighting schedules and all exterior lighting, including
the perimeter lighting, is controlled by staff. As a result, lighting operational hours and subsequent
electrical demand are kept to a minimum with the existing fixtures. Lighting upgrades are not
recommended to the interior spaces of the building because an analysis determined the majority of
that fixture heat is useful toward heating the building.
Electric Equipment
In addition to the building and pool support infrastructure, additional electric equipment included
some residential cooking equipment and a new sauna in the pool area, and fabrication and welding
equipment in the school shop spaces.
Lepquinum Wellness Center 15 Energy Audit (December 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.
Lepquinum Wellness Center 16 Energy Audit (December 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.
Lepquinum Wellness Center 17 Energy Audit (December 2011)
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 $4.35 per gallon for a seasonally adjusted blend of #1 and #2 fuel oil. The
analysis is based on 6% fuel oil inflation which has been the average for the past 20-years.
Electricity
Electricity is supplied by Metlakatla Power and Light. The building is billed for electricity under the
Public Building rate. This rate charges for both electrical consumption (kWh) and peak electric
demand (kW). Electrical consumption is the amount of energy consumed and electric demand is the
rate of consumption.
Metlakatla Power and Light Public Building Rate
Electricity ($ / kWh ) $0.0920
Cost of Power Adjustment ($ / kWh) $0.0000
Demand ( $ / kW ) $7.00
Customer Charge ( $ / mo ) $36.30
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 $0.11/kwh
General Inflation Rate 2% Electricity Inflation 2%
Fuel Oil Cost (2012) $4.61/gal Fuel Oil Inflation 6%
Lepquinum Wellness Center 18 Energy Audit (December 2011)
Appendix A
Energy and Life Cycle Cost Analysis
Lepquinum Wellness Center 19 Energy Audit (December 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
Lepquinum Activity Center
Basis
Economic
Study Period (years) 25 Nominal Discount Rate 5%General Inflation 2%
Energy
2011 $/gal Fuel Inflation 2012 $/gal
Fuel Oil $4.35 6% $4.61
Electricity $/kWh (2011)$/kW (2011)Inflation $/kWh (2012)$/kW (2012)
w/ Demand Charges $0.092 $7.00 1% $0.093 $7.07
w/o Demand Charges $0.110 -1% $0.111 -
EEM-4: Isolate Standby Boilers
Energy Analysis
Boiler Input MBH Loss %Loss MBH Hours, exist Hours, new kBtu η boiler Gallons
B-1 2,062 -0.50% -10 8,760 1,500 74,847 68%795
B-2 1,617 -0.50% -8 5,760 1,500 34,435 68%366
-18 109,282 1,160
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Disable and isolate standby boilers 0 4 ea $110 $440
Annual Costs
Manually sequence boilers 1 - 25 16 110 $60.00 $16,346
Energy Costs
Fuel Oil 1 - 25 -1,160 gal $4.61 ($151,654)
Net Present Worth ($134,900)
EEM-5: Perform Boiler Combustion Test
Energy Analysis
Annual Gal % Savings Savings, Gal
49,500 -1.0% -495
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Purchase combustion analyzer 0 1 LS $700 $700
Annual Costs
Clean and Combustion test 1 - 25 8 hrs $110.00 $14,984
Energy Costs
Fuel Oil 1 - 25 -495 gal $4.61 ($64,695)
Net Present Worth ($49,000)
Lepquinum Wellness Center 20 Energy Audit (December 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
Lepquinum Activity Center
EEM-6: Replace Aerators and Showerheads
Energy Analysis
Fixture Existing Proposed Uses/day Days Water,Gals % HW kBTU kWh
Showerhead 20.0 10.0 40 180 -72,000 80% -38,431 -11,263
Lavatories 0.3 0.2 40 198 -1,426 80% -761 -223
-73,426 -11,486
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace lavatory aerators 0 14 ea $35 $490
Replace showerhead 0 18 ea $100 $1,800
Energy Costs
Water 1 - 25 -73 kgals $10.960 ($12,625)
Electric Energy (Effective Cost)1 - 25 -11,486 kWh $0.111 ($20,020)
Net Present Worth ($30,400)
EEM-7: Install Boiler Room Heat Recovery
Energy Analysis
Heat Recovery
Boiler gph Jacket Loss MBH Hours Loss, kBtu Factor Recovery, kBtu η boiler Gallons
-16 0.75% -17 8,760 -149,028 50% -74,514 84%-640
Fan Energy
MBH ΔT CFM ΔP η, fan # Fans Hours kW kWh
17 25 630 1.50 35%2 7,500 0.6 4,752
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
1500 CFM HRV 0 1 LS $8,000 $8,000
Ductwork 0 1 LS $5,000 $5,000
Electrical 0 1 LS $1,500 $1,500
Estimating contingency 0 15%$2,175
Overhead & profit 0 30%$5,003
Design fees 0 10%$2,168
Project management 0 8%$1,908
Annual Costs
HRV maintenance 1 - 25 4 hrs $60.00 $4,086
Energy Costs
Electric Energy 1 - 25 4,752 kWh $0.093 $6,927
Electric Demand 1 - 25 7.6 kW $7.07 $843
Fuel Oil 1 - 25 -640 gal $4.61 ($83,709)
Net Present Worth ($46,100)
Gallons per Use
Lepquinum Wellness Center 21 Energy Audit (December 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
Lepquinum Activity Center
EEM-8: Install Modulating Boiler Burners
Energy Analysis
Annual Gal % Savings Savings, Gal
49,500 -3.0% -1,485
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Install modulating burner 0 3 LS $12,000 $36,000
Estimating contingency 0 15%$5,400
Overhead & profit 0 30% $12,420
Design fees 0 10%$5,382
Project management 0 8%$4,736
Annual Costs
Burner maintenance 1 - 25 2 LS $500.00 $17,027
Energy Costs
Fuel Oil 1 - 25 -1,485 gal $4.61 ($194,085)
Net Present Worth ($113,100)
Lepquinum Wellness Center 22 Energy Audit (December 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
Lepquinum Activity Center
EEM-9: Optimize HVAC Systems
Energy Analysis
Fan Case CFM ΔP η, fan BHP η, motor kW Hours kWh
S-1 Existing -20,000 2.75 55% -16 93% -13 8,760 -110,554
Optimized 15,000 2.00 55%9 93%7 8,760 60,302
R-1 Existing -20,000 0.75 55%-4 93%-3 8,760 -30,151
Optimized 15,000 0.50 55%2 93%2 8,760 15,076
S-2 Existing -8,700 3.50 55%-9 91%-7 8,760 -62,552
Optimized 6,500 2.75 55%5 91%4 3,000 12,575
S-3 Existing -6,000 3.00 55%-5 89%-4 8,760 -37,808
Optimized 4,000 2.00 55%2 93%2 1,440 2,643
S-6 Existing -2,400 1.25 50%-1 86%-1 8,760 -7,215
Optimized 1,500 0.75 50%0 86%0 420 130
S-7 Existing -3,600 1.00 50%-1 88%-1 8,760 -8,412
Optimized 1,800 0.75 50%0 88%0 1,920 691
-14 -165,275
Ventilation SA CFM MAT T,room MBH Hours kBtu η boiler Gallons
S-1 Existing -20,000 60 90 -648 1,800 -1,166,400 68% -12,385
Optimized 15,000 65 90 405 1,800 729,000 68%7,740
S-2 Existing -8,700 40 78 -357 1,800 -642,686 68%-6,824
Optimized 6,500 40 78 267 1,800 480,168 68%5,098
S-3 Existing -6,000 60 70 -65 1,800 -116,640 68%-1,238
Optimized 4,000 62 90 121 1,800 217,728 68%2,312
S-6 Existing -2,400 64 90 -67 1,800 -121,306 68%-1,288
Optimized 1,500 66 90 39 1,800 69,984 68%743
S-7 Existing -3,600 60 90 -117 1,800 -209,952 68%-2,229
Optimized 1,800 65 90 49 1,800 87,480 68%929
-672,624 -7,142
FO Use, gal kBtu Savings kBtu %gallons Reduction
Fuel Oil Boilers 49,500 4,661,910 -672,624 3,989,286 75% 31,769 -17,731
kBtu %kBtu kWh
Electric Boilers 3,989,286 25% 997,322 307,682
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace control system 0 120 pts $2,000 $240,000
Install electric boiler 0 1 LS $175,000 $175,000
Install VFD 0 8 LS $7,500 $60,000
Estimating contingency 0 15% $71,250
Overhead & profit 0 30% $163,875
Design fees 0 10% $71,013
Project management 0 8% $62,491
Annual Costs
DDC Maintenance 1 - 25 1 LS $1,000.00 $17,027
Energy Costs
Electric Energy 1 - 25 -165,275 kWh $0.093 ($240,921)
Electric Demand 1 - 25 -168 kW $7.07 ($18,635)
Electric Energy (Effective Cost)1 - 25 307,682 kWh $0.111 $536,260
Fuel Oil 1 - 25 -17,731 gal $4.61 ($2,317,438)
Net Present Worth ($1,180,100)
Lepquinum Wellness Center 23 Energy Audit (December 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
Lepquinum Activity Center
EEM-10: Upgrade Motors
Energy Analysis
Equip Number HP ηold ηnew kW Hours kWh
Pool 1 1.5 78.5% 86.5% -0.09 8,760 -784
R-1 1 5 83.3% 89.5% -0.23 8,760 -2,026
-0.3 -2,810
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs HP
Replace motor 1.5 0 1 LS 955 $955
Replace motor 5 0 1 LS 1,290 $1,290
Energy Costs
Electric Energy 1 - 25 -2,810 kWh $0.093 ($4,096)
Electric Demand 1 - 25 -4 kW $7.07 ($427)
Net Present Worth ($2,300)
EEM-11: Replace Single-Pane Glazing
Energy Analysis
Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons
Windows 45 1.0 3.0 20 -0.6 -5,256 68%-56
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace window glazing unit 0 45 sqft $75 $3,375
Estimating contingency 0 15%$506
Overhead & profit 0 30%$1,164
Design fees 0 10%$505
Project management 0 8%$444
Annual Costs
1 - 25 $60.00 $0
1 - 25 $60.00 $0
1 - 25 $50.00 $0
Energy Costs
Fuel Oil 1 - 25 -56 gal $4.61 ($7,294)
Net Present Worth ($1,300)
EEM-12: Upgrade Transformer
Energy Analysis
Location kVA ηold ηnew KW kWh
Electric Room 150 97.8% 98.9% -1.65 -14,454
Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost
Construction Costs
Replace transformer, kVA 150 0 1 LS $15,300 $15,300
Estimating contingency 0 5%$765
Overhead & profit 0 30%$4,820
Annual Costs
1 - 25 $60.00 $0
1 - 25 $60.00 $0
1 - 25 $50.00 $0
Energy Costs
Electric Energy 1 - 25 -14,454 kWh $0.093 ($21,070)
Electric Demand 1 - 25 -20 kW $7.07 ($2,196)
Net Present Worth ($2,400)
Lepquinum Wellness Center 24 Energy Audit (December 2011)
Appendix B
Energy and Utility Data
Lepquinum Wellness Center 25 Energy Audit (December 2011)
Alaska Energy Engineering LLC Billing Data
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Metlakatla Activity Center
ELECTRIC RATE
Metlakatla Power and Light Public Building Rate
Electricity ($ / kWh )$0.0920
Cost of Power Adjustment ($ / kWh)$0.0000
Demand ( $ / kW )$7.00
Customer Charge ( $ / mo )$36.30
Sales Tax ( % )0.0%
ELECTRICAL CONSUMPTION AND DEMAND
kWh kW kWh kW kWh kW kWh kW
Jan 48,750 98 52,000 104 52,500 101 43,500 104 49,188
Feb 45,900 98 46,350 104 40,250 101 46,000 104 44,625
Mar 43,200 96 51,200 104 49,750 101 43,700 104 46,963
Apr 48,350 97 47,250 104 44,700 101 42,550 104 45,713
May 40,750 98 44,000 103 40,700 101 46,900 104 43,088
Jun 37,800 98 38,600 103 32,950 101 32,500 66 35,463
Jul 37,700 98 32,950 103 29,150 101 29,250 54 32,263
Aug 24,900 98 39,400 100 40,800 101 37,400 88 35,625
Sep 28,450 70 45,600 93 43,300 101 43,500 95 40,213
Oct 33,400 77 46,500 94 44,600 101 47,200 102 42,925
Nov 38,300 98 45,850 101 43,750 101 40,950 97 42,213
Dec 46,300 104 44,950 101 42,700 101 43,050 60 44,250
Total 473,800 534,650 505,150 496,500 502,525
Average 39,483 94 44,554 101 42,096 101 41,375 90 41,877
Load Factor 58% 104 61% 104 57% 101 63% 104 103
ELECTRIC BILLING DETAILS
Month Energy Demand Cust & Tax Total Energy Demand Cust & Tax Total % Change
Jan $4,830 $725 $36 $5,591 $4,002 $704 $36 $4,742 -15.2%
Feb $3,703 $725 $36 $4,464 $4,232 $704 $36 $4,972 11.4%
Mar $4,577 $725 $36 $5,338 $4,020 $704 $36 $4,760 -10.8%
Apr $4,112 $725 $36 $4,873 $3,915 $704 $36 $4,654 -4.5%
May $3,744 $725 $36 $4,505 $4,315 $704 $36 $5,055 12.2%
Jun $3,031 $725 $36 $3,792 $2,990 $704 $36 $3,730 -1.6%
Jul $2,682 $725 $36 $3,443 $2,691 $704 $36 $3,431 -0.3%
Aug $3,754 $725 $36 $4,514 $3,441 $704 $36 $4,181 -7.4%
Sep $3,984 $725 $36 $4,744 $4,002 $704 $36 $4,742 -0.1%
Oct $4,103 $725 $36 $4,864 $4,342 $704 $36 $5,082 4.5%
Nov $4,025 $725 $36 $4,786 $3,767 $704 $36 $4,507 -5.8%
Dec $3,928 $725 $36 $4,689 $3,961 $704 $36 $4,700 0.2%
Total $ 46,474 $ 8,694 $ 436 $ 55,603 $ 45,678 $ 8,442 $ 436 $ 54,556 -1.9%
Average $ 3,873 $ 725 $ 36 $ 4,634 $ 3,807 $ 704 $ 36 $ 4,546 -1.9%
Cost ($/kWh)$0.110 84% 15% 1% $0.110 -0.2%
Electrical costs are based on the current electric rates.
2009 2010
2010Month200720082009 Average
Lepquinum Wellness Center 26 Energy Audit (December 2011)
Alaska Energy Engineering LLC Annual Electric Consumption
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Metlakatla Activity Center
0
10,000
20,000
30,000
40,000
50,000
60,000
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
20
40
60
80
100
120
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
Lepquinum Wellness Center 27 Energy Audit (December 2011)
Alaska Energy Engineering LLC Electric Cost
25200 Amalga Harbor Road Tel/Fax: 907-789-1226
Juneau, Alaska 99801 jim@alaskaenergy.us
Metlakatla Activity Center 2010
$ 0
$ 1,000
$ 2,000
$ 3,000
$ 4,000
$ 5,000
$ 6,000
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
20
40
60
80
100
120
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
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
Lepquinum Wellness Center 28 Energy Audit (December 2011)
Alaska Energy Engineering LLC
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 $4.35 $44.87 23,296 $11.61 362
Electricity $0.110 $33.90
Source Cost
Electricity 502,525 kWh $55,200 1,710 20%
Fuel Oil 49,500 Gallons $215,300 6,720 80%
Totals -$270,500 8,430 100%
Annual Energy Consumption and Cost
Consumption Energy, MMBtu
$0
$5
$10
$15
$20
$25
$30
$35
$40
$45
$50
Fuel Oil ElectricityCost $ / MMBtuCost of Heat Comparison
Lepquinum Wellness Center 29 Energy Audit (December 2011)
Appendix C
Equipment Data
Lepquinum Wellness Center 30 Energy Audit (December 2011)
MotorLocation Function Make Model Capacity HP / Volts / RPM / Effic NotesC-1 Boiler Room Vent FanPACEPM 183500 CFM 1 HPRF-1A Fan Room Return FanPACEPM 6646000 CFM 10 HPRF-1B Fan Room Return FanPACEPM 6646000 CFM 10 HPEF-1 Fan Room General Exhaust PACEU36 AF 12240 CFM 5 HPEF-2 Fabrication Room Fume Hood KEWANEE 5-23302-CA 750 CFM 1/2 HPEF-3 Electrical Room CoolingPENNZ-10300 CFM 130 WattEF-4 Electrical Room CoolingPENNZ-8150 CFM 105 WattAHU-1 B236HeatingPACEP54105000 CFM 75 HPAHU-2 A102HeatingPACEP4024000 CFM 20 HPFan Room Transformer Field7486100 KVAFan Room Transformer Field7486100 KVAFan Room Transformer Field7480100 KVAP-1 Boiler Room Head Circulation Taco12243N1-4.3 65 GPM 1/4 HP/ 115 V/ 1725 RPMP2-A Boiler Room East, West Wing Heat TacoCM2510-9.25 360 GPM 10 HP/ 480 V/ 1760 RPM/ 89.5%P-2B Boiler Room East, West Wing Heat TacoCM2510-9.25 360 GPM10 HP/ 480 V/ 1760 RPM/ 89.5% Discharge P. 49 PSIP-3A Boiler Room AHU - 1 HeatCoil Taco CM2007-5.8 130 GPM 2 HP/ 480 V/ 1730 RPM/ 78%P-3B Boiler Room AHU - 1 HeatCoil Taco CM2007-5.8 130 GPM 2 HP/ 480 V/ 1730 RPM/ 78% Discharge P. 26 PSIP5-AB Boiler Room Boiler Circulation Taco 5AS5JXFSE-3749 37 GPM 1/6 HP/ 120 V NOT USEDUnit IDMetlakatla Activity Center - Major Equipment InventoryLepquinum Wellness Center 31 Energy Audit (December 2011)
MotorLocation Function Make Model Capacity HP / Volts / RPM / Effic NotesUnit IDMetlakatla Activity Center - Major Equipment InventoryB1 313BoilerWeil Melain 6881358 MBHB2 313BoilerWeil Mclain 7881732 MBHB3 313BoilerWeil Mclain 8881904 MBHP1 202Pool Circulation Aurora3x4x9B450 GPM 15 HP/ 480 V/ 1775 RPM/ 88.5% 70' Head PressureP4 202Tempered Circulation Water Grundfos UP26-96BF205 W/ 115 V/ 1750 RPMP3 202Circulation Hot Water Grundfos UP26-96BF205 W/ 115 V/ 1750 RPMP5 202Pool Heating Pump TACO1941C1E11 1/2 HP/ 480 V/ 1725 RPM/ 78.5%P6 110Domestic Hot Water TACO1611B3E1L1/4 HP/ 115 V/ 1725 RPMP7 202Building Heating PumpArmstrong 3x2.5x8 175 GPM 7.5 HP/ 480 V/ 1760 RPM/ 88.5% 60' Head PressureP8 202Building Heating PumpArmstrong 3x2.5x85 HP/ 480 V/ 1740 RPM/ 87.5%SaunaSussman H61002 70C240 V/ 14 KWMain Floor ElectricTransformer Source D 150T3H 150 KVAnon TP1Basement Storage Shop Air Compressor Cartis2-Stage Compressor10 HP/ 480 V/ 1760 RPM/ 89.5%Boiler Room Pneumatic Air CompressorDayton52700Boiler RoomDomestic Hot Water HeaterAustrolWH5802COW 80 gallon indirect hot water heater Blue BulletWeld Shop Welding Station RoboVent DFMS-3000-35 HP/ 480 V/ 1740 RPM/ 87.5%S1 311Pool Air IICentralaire T-4120000 CFM 20 HP/ 480 V/ 1725 RPM/ 87.5% running - no beltR1Centralaire L362720000 CFM 15 HP/ 480 V/ 1725 RPM/ 89.5%
Lepquinum Wellness Center 32 Energy Audit (December 2011)
MotorLocation Function Make Model Capacity HP / Volts / RPM / Effic NotesUnit IDMetlakatla Activity Center - Major Equipment InventoryS2 311Lobby/Locker Centralaire T-178700 CFM 15 HP/ 480 V/ 1775 RPM/ 88.5%S3 312Wood/Machine Shop Centralaire M14206000 CFM 7.5 HP/ 480 V/ 1725 RPM/ 86%S4 106Auto High Bay not available3150 CFMS5 311WeldingCentralaire no data3600 CFM 2 HP/ 480 V/ 1725 RPM/ 84% GouldS6 324HandballCentralaire L06122400 CFM 1.5 HP/ 480 V/ 1760 RPM/ 84%S7 313AHU Activity Center Centralaire L08143600 CFM 2 HP/ 480 V/ 1745 RPM/ 84%E2 305Lobby/Locker Porter18H3600 CFM 2 HP/ 480 V/ 1775 RPM/ 84%E3 Control Room Lobby/Locker Porter221C6000 CFM 3 HP/ 480 V/ 87.5%E4 110Weldingnot available1800 CFM 3/4 HP/ 480 Vsecured - new welding stationE5 110Weldingnot available1800 CFM 3/4 HP/ 480 Vsecured - new welding stationE6 206Sawdustnot available2600 CFM 10 HP/ 480 V/89.5%E7 106Auto High Bay not available3600 CFM 1 1/2 HP/ 480 V/ 84%E8 207Spray Paint not available1500 CFM 1 HP/ 480 V/82.5E9 313Toiletsnot available800 CFM 3/4 HP/ 480 VE10 207Finishingnot available1500 CFM 1 HP/ 480 V/ 82.5%E11 313Snack Barnot available800 CFM 3/4 HP/ 480 V
Lepquinum Wellness Center 33 Energy Audit (December 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
Lepquinum Wellness Center 34 Energy Audit (December 2011)