Attachment 2 - Maintenance and Service Agreements
To ensure the guarantee School District must maintain equipment as required by
Operational and Maintenance Manuals / Manufacturer Recommendations of all
equipment provided under this contract.
measure would include checking the air flow at the diffusers to ensure that it meets
current code required flow.
ECM 9- Kitchen Hood
The existing kitchen exhaust systemhas a basic on/off operation. This results in the system
operating during times when it doesn’t need to be operating and conditioned 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 installed in the duct work and control
operation based on the temperature inside the duct.
for commercial and industrial transformers supplying linear loads in the 30-150 kVA
range is 95%, as compared to 98% for a high efficiency model. Further, conventional
transformer losses, which are non-linear, increase by 2.7 times when _ feeding
computer loads.
EEI recommends the replacement of existing inefficient transformers in order to improve
the energy efficiency ofthe electricaldistribution systems through the replacement
of the transformers with new high efficiency units. The scope of work for this measure
would include:
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:
Nashua South High School
ECM 1 - LED Lighting
The schools currently utilize a combination of T8 and T5 fluorescent lighting. EEI proposes
replacing the existing fixtures with new LED lighting. EEI performed a detailed survey of the
interior and exterior spaces in order to identify opportunities in which we can improve
lighting quality, reduce maintenance costs, and save energy.
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
