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ENERGY EFFICIENT INVESTMENTS INC.

heat output adds to the building cooling load.

EEI recommends the replacement of existing efficient transformers in order to improve the energy
efficiency of the electrical distribution systems through the replacement of the transformers with
new high efficiency units. The scope of work for this measure would include:

30 Transformers

(6) 15 kVA
(2) 45 kVA
(2) 75kVA
(8) 112.5 kVA
(3) 150 kVA
(5) 220 kVA
(1) 225 kVA
(2) 300 kVA
(1) 400 kVA

IPMVP Option B, Retrofit Isolation with All Parameter Measurement, has been chosen for this ECM. This
option has been chosen because the only parameters changing in the implementation of this ECM are the
transformer losses. EEI will use current transducers to measure the losses for each transformer over a one
month period to obtain a representative transformer loading profile.

ECM 5- Retro Commissioning

This is an allowance for an engineermg and maintenance team to install, repair, and replace any
damaged existing to remain equipment. Existing AHUs will include software revisions to reduce energy
consumption. Includes 5 years of analytics reports.

IPMVP Option C, Utility Data Analysis of Whole Building, has been chosen for this ECM. This option
has been chosen because the wide ranging effects of Retro Commissioning on building energy
performance does not lend itself to isolation measurement. EEI has established the building baseline
energy usage using utility data, see “Baseline Development and Performance Period” section. The
building energy usage will continue to be recorded after the ECM implementation and compared to the
baseline to determine savings. The savings guarantee is contingent on several building operations
factors described in the Conditional Savings Guarantee section later in this report.

ECM 6-—- Mini Splits
EEI proposes removing the (16) existing Mitsubishi ductless splits.

Furnish and install (16) new Mitsubishi condensing units of the same capacity of the existing system.
Counts are as follows: (4) 1-ton ceiling cassette systems, (7) 1.5-ton ceiling cassette systems, (1) 2-ton
ceiling Cassette system, (1) 1 ton wall mounted system, (2) 1.5 ton wall systems, (1) 3.5 ton under

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ceiling system. New units will be furnished with wind baffles for low ambient cooling and new wall
mounted thermostats

Furnish and install (1) York cooling only system, 3.5-ton cooling

IPMVP Option B, Retrofit Isolation with All Parameter Measurement, has been chosen for this ECM. This
option has been chosen because the only parameter changing in the implementation of this ECM is the mini
split Energy Efficiency Ratio (EER). EET will use current transducers to measure the EER for a 20% sample
of the mini splits over a one month period to obtain a representative loading profile.

ECM 7—- Condensing Hot Water

The current water heating units are standard efficiency. This measure would be to replace the current
system with high efficiency condensing Lochinvar units.

IPMVP Option A, Retrofit Isolation with Key Parameter Measurement, has been chosen for this ECM. This
option has been chosen because the only parameter changing in the implementation of this ECM is the
combustion efficiency. EEI will use a flue gas analyzer to measure each water heater efficiency before and
after ECM implementation.

ECM 8 -— Targeted Balancing

EEI proposes targeted balancing of the existing ventilation systems. When ventilation units are over-
ventilating it causes unnecessary conditioning of outside air. This measure would include checking the
air flow at the diffusers to ensure that it meets current code required flow.

IPMVP Option A, Retrofit Isolation with Key Parameter Measurement, has been chosen for this ECM. This
option has been chosen because the only parameter changing in the implementation of this ECM is the
airflow amount. EEI will use airflow hoods to measure a 20% sample of diffuser airflow cfm before and after
ECM implementation.

ECM 9- Kitchen Hood

The existing kitchen exhaust system has a basic on/off operation. This results in the system operating during
times when it doesn’t need to be operating and heated or cooled air is exhausted. This measure is for
installing a Captive Aire unit with VFD drives on make-up air and exhaust fans. A temperature sensor will be
located in the duct work and control operation based on the temperature inside the duct.

IPMVP Option B, Retrofit Isolation with All Parameter Measurement, has been chosen for this ECM. This
option has been chosen because the only parameter changing in the implementation of this ECM is the
kitchen hood exhaust fan speeds. EEI will use Energy Management System (EMS) trending data over a one
month period to obtain a representative loading profile.

ECM 10- Walk In Coolers

EEI recommends refngeration controllers on walk-in coolers and freezers and installing electronically
commutated (EC) motors on evaporator fans. A controller can start/stop the evaporator fans when operation
is unnecessary. The EC motors are 30% more efficient than the standard two-pole motors. Energy savings

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will be realized by reducing the runtime of the compressors and evaporator fans as well as the reduction in
power load of the new fans. Each walk-in cooler or freezer will have a new EC fan motor and blade installed
as well as a dedicated controller. In addition, controllers will be installed on the freezer to optimize the
operation of the electric defroster and door heater. The controller unit senses when refngerant has ceased
flowing through the evaporator coil and controls the fan motors. Door and frame heaters are controlled based
on dew point, reducing their run time by 95% in coolers and 60% in freezers. The controllers will reduce
compressor and evaporator runtime by up to 10%.

Calculations

Energy savings will result from both reducing the fan power and the efficient control of the evaporator fans
and door heaters. In general, EEI uses the following approach to determine savings for this specific measure:

Existing kW Cost per kWh
Cost of Existing Equipment
Cost of Proposed Equipment Energy Savings

Listed Equipment Amperage x Voltage of Equipment Average Site Data Package $/kWh
= Existing kW x Cost per kWh x Effective Full Load Hours

= Existing kW x Cost per kWh x Full Load Hours Using Control

= Existing Equipment Costs- Proposed Equipment Costs

IPMVP Option B, Retrofit Isolation with All Parameter Measurement, has been chosen for this ECM. Ths
option has been chosen because the only parameters changing in the implementation of this ECM are the
evaporator fan power and run time hours, the condensing unit run time hours, and the door heater run time
hours. EEI will use current transducers to measure each parameter over a one month period to obtain a
representative loading profile.

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3. RISK & RESPONSIBILITY SUMMARY

Responsibility Description Proposed Approach

Energy Prices Contract energy prices have been set in the M& V plan. These rates are
based onthe current electric and natural gas costs and are escalated
based onthe US Department of Energy.

M&V Costs The M&V costsare fixed for the duration of the contract. EEI accepts
all risks associated with performing the M& V activities as stated herein.
User Participation Lighting and ECMs: The savings for the lighting and ECMs are based

on the continuation of the current operating strategies. This
responsibility is acceptedby the customer after project completion. The
savings from the operation of the EMCs are based on the control
sequences outlined herein. Since these control sequences could be
overridden by the facility operating staff, the customer accepts
responsibility that the ECMs will continue to operate as specified.
Equipment Performance Lighting: EEI is responsible for ensuring the new lamps and ballasts are
as specified and meet the guaranteed energy savings.

ECMs: EE] is responsible for maintaining fan, pump motors, etc. so that
the power draws remain at the baseline level.

HVAC equipment: EEI will ensure the performance of equipment
outlined in project scope and verify performance during
commissioning, The customer is responsible for maintaining all
equipment and providing annual maintenance records to EEI upon
request.

4, EXISTING CONDITIONS DESCRIPTION

Refer to Final IGA report for existing building descriptions and Energy Conservation Measures
chosen to be implemented by the School District. Careful consideration was given to each measure
and its interaction with the overall building performance.

5. OPERATING HOURS

Lighting operating hours are based on 180 school calendar days, from 6am-4pm, with some
allowance for evening programs or sporting events, as well as operating hours during the summer, in
portions of the building, from 7am-3pm. The post-retrofit period operating hours is assumed to be
the same as the baseline period. Should the customer change the operating hours, the estimated
savings will not change, and baseline updates will need to be made.

Operating hours for other equipment such as boiler, fans, pumps, etc. are based on the baseline
calculations and in the case of a substantial change in schedule, EEI should be notified by the
customer so that baseline adjustments can be made.

Heating set-point will be no higher than 68°F and cooling set-pomt no lower than 72°F. EEI has
estimated the load on the facility based on historical data. The customer is responsible for
maintaining similar operating hours and load conditions in the post-installation period. If operating
hours or load increases, the estimated savings will not change, and baseline updates will need to be
made.

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6. RATE DATA INFORMATION
The fuel rate values are based on Contract Rates listed as such; $0.15/kWh, $1.00/therm. In using
these contract rates, variation and volatility within the energy markets is eliminated.

7, OPERATIONS, PREVENTATIVE MAINTENANCE, REPAIR AND REPLACEMENT
REQUIREMENTS

Customer will report on all maintenance work completed annually and will continue to maintain
records and make these records available to EEI upon request.

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Baseline Development and Performance Period

EEI has developed a baseline energy consumption model using 2016 historical energy use data as well
Heating Degree Day (HDD) and Cooling Degree Day (CDD) weather data for the same time period. This
model will be used to compare future actual energy consumption to the baseline weather normalized value.

In the following tables, we have used the 2016 HDD and CDD Data as well as the utility usage for that
period, to create a Year 0 — Baseline the Nashua North and South High Schools. The Dr. Norman Crip
Elementary School was not included in this analysis because M&V option A will be used for the Solar P. V.
ECM.

Upon project completion, the Year 1 - Performance Period will begin and subsequent M&V reports will
show the actual reported utility use as well as the weather normalized baseline use. This will yield a useful
comparison of the building’s post construction energy consumption and cost as opposed to a baseline model
in which no upgrades occurred.

Measurement And Verification Document

EEI Prepared by: Energy Eficient Investments, Inc. Prepared for: Nashua School Distict Contrad Number:
me Sr eaceesLaa 19D Star Drive Nashua High Sch oof North Report Date
Merrimack, NH 03054 Nashua High Schoo! South Starting Period
Ending Period:
Contract Rates:
| Electricity | $0.15 | TkWh | Natural | $1.00 | Itherm
Nashua High School North
HDD @| cop @] Baseline fest Baseline Total Actual nee Actual Totd | Baseline Baseline Baseline | Actual | Actual | Actual Baseline
Year 65F 65F Electrical Gas Use Energy Use | Electrical Gas Use Energy Use | Elec Cost Gas Cot Total Cost | Elec Cost | Gas Cost | TotalCost] Savings EUI Actual EU!
Month Month Use (kWh) kBT! Use (kWh) kBTU)
lonthly lonthly | Use (kWh) (therm) {kBTU) Ise (kWh) (therm) ( ) (8) ® (8) (8) ®) (8)
2016-2018 AVG Baseline 6071 1050 3,948,662 141,816 27,654,435 3, 948,662 141,816 27,654,435 $592,299 $141,816 $734,115 $592209 $141,816 $734,115 $ - 66 66
Nashua High School South
HDD @} CODD @] Baseline Netural Baseline Totq Actual anal Actual Tota] Baseline Noturat Baseline | Actual Actual Actual Basel
Year 65F 65F Electrical Gas Use Energy Use] Electrical Gas Use Energy Use] Elec Cost Gas Co " Total Cost] Elec Cot | Gas Cot] TotalCost] Savings vie Actual EU!
Monthly | Monthly | Use (kWh “Gren (BTU | Use (kWh “therm | (KBTU) (8) @ (8) (8) @) (8)
2016-2018 AVG Baseline 6071 1050 3,725,082 141,589 26,868, 8803, 725,082 141,589 26,868,880 $558,762 $141,589 $700,351 $558,762 $141,589 $700,351 $ - 64 64

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ENERGY EFFICIENT INVESTMENTS INC.

Nashua High School South Total Weather Normalized Annual Energy Costs
$800,000

$700,000

$600,000

$500,000

$400,000

$300,000

$200,000

$100,000

a 2016-2018 AVG Baseline

@ Natural Gas $141,589
@ Electricity $558,762

Nashua High School North Total Weather Normalized Annual Energy Costs
$800,000

$700,000

$600,000

$500,000

$400,000

$300,000

$200,000

$100,000

5-

2016-2018 AVG Baseline
@ Natural Gas $141,816
B Electricity $592,299

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Conditional Savings Guarantee

1. Windows and doors must remain closed all the time during the heating season and all window a/c units
must be removed prior to the beginning of the heating season as described below.

2. Thenew control system will use an “optimum start” sequence to determine the start-up time, which will
likely be 6AM. This sequence will evaluate indoor/outdoor conditions by taking temperature and
humidity measurements and start the equipment accordingly so that proper set-poimts are reached pnior to
occupancy. Shut offtime will likely be 9PM, in order to give cleaning crew time to work.

3. Thenew heating set-point (Oct 1’t— April 30") will be 68°F and the cooling set-point (May 1%t— Sept
30") will be 72°F, as agreed to between EEI and the customer. Please see Appendix B for the standards
of comfort.

4. EEI may conduct an annual site visit during which the lighting system and other ECMs will be inspected
to verify proper operation, ensure that it has been maintamed, and ensure that it continues to have the
potential to generate the expected savings. Lights may be opened to verify lamp counts and ballast types,
replacement stock may be inspected during the site visit to ensure that the proper replacement equipment
is available.

5. The annual M&V report will detail the results of annual inspection, noting significant problems such as
burned out lamps, change in operating hours, building size, addition of new equipment following project
completion, etc.

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Appendix A - Utility Bills provided by School District

Utility Bills may be provided upon request.

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ENERGY EFFICIENT INVESTMENTS INC.

Appendix B— Standards of Comfort

EEI, Inc. .
Nashua School District

Occupied WT tery E-Le) = satel etal] 3) [1] i
Building rt) aie} Tiere tae acl | “Cooling Setpoint °F Cooling

Nashua High School North

Classrooms 68 60 72 80

Media Center 68 60 72 80

Cafeteria/Kitchen 68 60 72 a0

Auditorium 68 60 72 80

Offices 68 60 72 80

Gym 68 60 72 80

Library ‘68 60 ¥2 80

Hallways 68 60 f2 80
Nashua High School South

Classrooms 68 60 72 80

Media Center 68 60 72 80

Cafeteria/Kitchen 68 60 72 80

Auditorium 68 60 72 80

Offices 68 60 72 80

Gym 68 60 72 80

Library 68 60 72 80

Hallways ‘68 60 72 80

Notes:
1. All setpoints and times are suggested. Actual values to be determined after discussions with Nashua School District.
2. EE! will program a General Building Override button. This will allow the building operator to overnde the building schedule for non-scheduled events (such as snow days)

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