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Mechanical Systems AFTER
Heat Sealed combustion 92% AFUE gas boiler
boiler in conditioned basement
Cooling 14+ SEER split system in conditioned space
DHW 0.82 EF side-arm storage tank
Ducts R-4.2 flex runouts in dropped ceiling or in floor joists
Leakage none to outside (5% or less)
Ventilation Fan Cycler Supply-only system integrated with AHU
33% Duty Cycle: 10 minutes on; 20 minutes off
60-80 CFM continuous average flow
Return Pathways Transfer grilles/jump ducts at bedrooms
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Heating 60% AFUE for the old boiler -gas -delivered by radiators Cooling 9 EER for the window units
DHW 0.4 EF for hot water efficiency- AVERAGE summer efficiency is much worse winter efficiency would be about at 60% (since the boiler is heating the house already)
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• New Locally Sourced Pine Floors and Trim
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Annual
Savings
Annual
Finance
Cash Flow
$75,000 $4005 $4832 ($827)
Energy Measures = New Mechanical Systems, Insulation, and New Windows
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