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 North High School are standard efficiency models that
are not designed to handle the loads of modern facilities. The most common efficiency
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 upgrading:
32 Transformers
(5) 15 kVA
(4) 30 kVA
(2) 45 kVA
(1) 75 kVA
(6) 112.5 kVA
(1) 145 kVA
(1) 150 kVA
(1) 175 kVA
(3) 220 kVA
(4) 225 kVA
(2) 300 kVA
(2) 500 kVA
ECM 5 -— Retro Commissioning
This is an allowance for an engineering 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.
ECM 6 — Mini Splits
EEI proposes removing the (19) existing Mitsubishi ductless splits.
Furnish and install (19) new Mitsubishi condensing units of the same capacity of the
existing system. Counts are as follows: (7) 1-tonceiling cassette systems, (3) 1.5-ton
ceiling cassette systems, (1) 2-tonceiling cassette system. (1) 1-ton wall mounted
system, (6) 1.5-ton wall systems, (1) 2-ton wall mounted system. New units will be
furnished with wind baffles for low ambient cooling and new wall mounted thermostats.
