Scope of Work:
Install (3,860) LED 2x4 and 2x4 retrofit fixtures with Spacewise control and wireless
dimming capability
Install (260) LED high bay fixtures with Spacewise control and wireless dimming capability
Install (642) LED recessed can fixtures
Install (2,947) LED tubes and (1,644) LED drivers
Install (193) LED lamps
Install (47) LED round decorative fixtures
ECM 2 —- Controls Upgrade
EEI proposes installing a complete DDC system as an extension of the existing N4
Enterprise Supervisor.
Scope of work:
e Demo the existing VAV controllers, keeping the existing communication wiring
operational for the existing controllers.
e New BACnet IP DDC controllers, new space sensors with CO2, and new discharge
air sensors. Reuse existing control valves. Provide programming to reduce
minimum airflow when space temperature and CO2 levels are satisfied.
e Assistance in displaying building analytics software. Review analytics reports with
the team and retro-commission systems to remedy problem zones. Repeat this
monthly to fine tune the building HVAC systems.
e Assistance to the balancing contractor to calibrate VAVs, airflow stations, and
AHUs.
e Network controller hardware and software updates as needed.
ECM 3 -— Weatherization
EEI completed a detailed building audit. Suspected air leakage locations were verified
and opportunities to improve building performance and save energy were found. Air
leakage is caused by pressure differences subject to variations in wind velocity and
HVAC systems. In order to control heating and cooling loads, and allow the mechanical
systems to operate effectively, pressure differences from the outdoor environment to
the indoor building spaces must be controlled. The best way to do this is by tightening
the building envelope through insulating and air sealing. This will extend the life cycle
of the building by protecting it from the elements and minimizing moisture carried by
air which penetrates the building. Also, insulation and air sealing increases thermal
performance of the building and the comfort, health and safety of the building
occupants.
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
EEI evaluated the electrical systems of the s chool buildings and determined that the
existing transformers at Nashua South High School are standard efficiency models that
are not designed to handle the loads of modern facilities. The most common efficiency
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