We increased our comfort while significantly decreasing our energy use with a deep energy retrofit (DER) supported by the National Grid DER pilot program.


What You Need to Know


Roof: R-48 with closed-cell spray foam, interior only (applied before National Grid DER) Walls: R-40 with 4" of polyisocyuranate rigid foam on exterior and blown-in cellulose in cavities Basement walls: R-18 with closed-cell spray foam (applied before National Grid DER) Windows: R-5 Paradigm Windows double-hung, awning, and casement replacement units (31 units total) Heating and DHW: Buderus modulating condensing boiler with super-insulated DHW storage tank Ventilation: Balanced ventilation with a 75% efficient Heat Recovery Ventilator

My Motivation:

#1--to increase energy efficiency of home #2--to increase comfort of home and gain back space that we rarely used because of uncomfortable temperatures #3--to benefit the environment


Our initial insulation project--foaming the basement and rafters--greatly improved the energy efficiency of the home. Completing the DER in the second stage only made sense because we were already removing the siding (vinyl, to be replaced with clapboard) for aesthetic reasons.

Open House Info:

Oct. 13, 2012; 10AM - 1PM

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