Smart Design: Optimizing Efficiency in High-Performance Homes Doesn’t Always Mean PH Certification

July/August 2015
This online-only article is a supplement to the July/August 2015 print edition of Home Energy Magazine.
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June 06, 2015
Two recent Passive House (PH) consultations of mine have made clear the difficulty of making the PH standard more widely adopted in this country. Both consultations were for small, single-family homes. Neither house was more “green” than the other, but one was able to meet the PH standard and one wasn't—even with R-values over 100. I'll explain in this article how two seemingly minor differences, the shading conditions and the area-volume (A-V) ratio, had a huge impact on the energy demands of these otherwise very similar projects.

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