Utility Analysis
The utility bills were analyzed to better understand the energy use of each building. Each
building utilizes natural gas provided by Liberty Utilities for HVAC heating, domestic hot
water heating, and cooking. The electricity is provided by Eversource. The utility data was
analyzed over a three year period, 2016-2018, and shows an average Energy Use Index
(EUI) of 65 at the Nashua North High school, and 62 at the Nashua South High School. The
EUI is used to compare energy consumption per square foot of building space. According to
the U.S. Department of Energy, the average EUI fora K-12 Facility is 48.5. This means that
both schools use approximately 35% more energy than the average K- 12 facility. Given this
information, we believe there are energy saving opportunities at each school. See the table
below summarizing the annual energy consumption data.
Building Summary Information
Project Name: Nashua North & Nashua South High Schools
Annual Utility Data
Average Use
2016-2018
Nashua North
HS. Nat Gas (therms) 141,816
Elec (kWh) 3,948,662
Nashua South
HS. Nat Gas (therms) 141,589
Elec (kWh) 3,725,082
Contract Utility Rates
Natural Gas Therm Rate 51.00
Electricity Electric Rate $0.15
Nashua, NH Balance Point (65°)
HDD 6071
CDD 1050
ENE Systems, Inc. / Energy Efficient Investments, Inc.
~Confidential & Proprietary~
