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Building America DOE Challenge Home Case Study, Transformation, Inc., Production House, Devens, MA

Case-study of a DOE Challenge Home in Devens MA that scored HERS 35 without PV or HERS -37 with PV. This 2,508 ft2 custom home has R-46 double-stud walls with open–cell spray foam, a vented attic with R-67 blown cellulose, plus R-10 rigid XPS under the slab, R-20 closed-cell spray foam on basement walls, triple-pane windows, and one mini-split ductless heat pump.