Payback between double- and triple-glazed windows?
I have designed a 4,800 sqft home in NH (Zone 6) with “REMOTE” insulation building assemblies. R-40 walls, R-60 ceiling and R-20 sub slab. The windows were to be Eagle triple glazed U-.265. My client has asked me what the pay back is between using Eagle triple pane versus double glazed U-.31. For the entire house the cost difference is $2,000 and the efficiency difference is 16%. This seems like a good value to me especially in a house that is deeply insulated. Anyone have suggestions or answers to his question “what is the payback?”
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