Posted on March 02,2015 by ScottG in Michler
As difficult as it is to meet the requirements for Passivhaus certification, builders and designers have a great deal of leeway in how they approach it. There are just a few big hurdles to clear, including limits on how much energy the building can use and how airtight the building envelope must be.
Exactly how a builder accomplishes this is not spelled out. As long as the building meets the standard, it can win certification, either from the Passive House Institute U.S. (PHIUS) or its European counterpart, the Passivhaus Institut (PHI).