Ducted heat pump retrofit

We have a 1200sqft, single story (with basement) in Zone 6 (northern New England). Built in the 1950s, it’s been upgraded with insulation (R60 attic, blown fiberglass in the 2×4… We have a 1200sqft, single story (with basement) in Zone 6 (northern New England). Built in the 1950s, it’s been upgraded with insulation (R60 attic, blown fiberglass in the 2×4…Read MoreGreenBuildingAdvisor