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 Armor Floor
Mounted units with 98% efficiency. The units have a 5:1 turndown with stainless steel
heat exchanger. Scope to include new ASME storage tanks, expansion tanks, and
circulation pumps.
ECM 8 - Targeted Balancing
Scope of work:
Inspect exterior doors for deficiencies to the weather stripping and door sweeps. Install
new weather stripping and door sweeps as needed.
ECM 4 - Transformers
Assumptions:
o Net Annual Interior LED Lighting kWh Savings = 820,956 kWh
o % of time HVAC Systemis Heating = 3000 hours / 8760 hours = 35%
o % of time HVAC Systemis Cooling = 3000 hours / 8760 hours = 35%
o Heating SystemEfficiency = 80%
o Cooling System Efficiency = .7 kW/ton
o Utility Rate per Therm = $1.00/therm
o Utility Rate per kWh = $.15/kWh
Scope of Work:
Install (2,953) LED 2x4 and 2x4 retrofit fixtures with Spacewise control and wireless
dimming capability
Energy Conservation Measures
In this section of the document we will define the Energy Conservation Measures we have
evaluated for this project. Then we will define the measures on a building by building basis.
Careful consideration was given to each measure and its interaction withthe overall building
performance.
General ECM Descriptions
Nashua North High School
ECM 1 - LED Lighting
ECM Matrix
ECM Matrix
Upgrade
ransformers
Commissioning
Hot Water
argeted Balancing
Hood
In Coolers
otal NNHS
Upgrade
ransformers
Commissioning
Hot Water
argeted Balancing
Hood
In Coolers
otal NSHS
Cost for Installed Energy Savings potential Rebates “wal Hectric
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Al?
$1,077,300
$50,000.
$577,371.
$262, 080.
700.
$165,000.
$75,000.
000.
$35,000.
$3690,868.
Executive Summary
EEI is located in Merrimack, NH, and has a proven track record of designing and
implementing energy improvements to mechanical systems, building controls systems,
insulation, and renewable systems. EEI is also an approved energy management contractor
with, Eversource, Liberty Utilities, and Unitilin New Hampshire.
EEI has developed a plan which could reduce annual energy expenditures in the
district by more than $466,719.70
Table of Contents
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7
Energy Conservation Measures DEPP
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ENE Systems, Inc./Energy Efficient Investments, Inc.
Investment Grade Audit
FOR:
Nashua School District
Prepared by:
Michael Davey, CEM
Date: December 05, 2019
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ENERGY EFFICIENT INVESTMENTS INC. EFFICIENT INVESTMENTS INC.
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REDUCING THE OPERATING AND ENERGY COSTS OF YOUR FACILITY
