This Habitat for Humanity house in Charlotte, Vermont was designed to meet the strict energy use and airtightness metrics that govern the international Passive House standard. A new certification introduced by Passive House Institute U.S. might change the way some Passive House Buildings are modeled, designed, and commissioned in North America.
A new certification system combining the Passive House standard with the Home Energy Rating System (HERS) Index will issue its first certificates in January 2012, according to Katrin Klingenberg, cofounder and executive director of Passive House Institute U.S. (PHIUS). Called PHIUS+, the certification is separate from international Passive House certification, though projects still must meet the three modeled performance metrics that form the backbone of the international standard.
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