"I was looking at REM/Rate and the GSHP only needs COP entered. It looks like you only need to model the type of water heater you are using for EF and also check desuperheater in the heat pump section if they are coupled."
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New York is increasing its energy standards and is investigating the possibility of implementing the Passive House Standard for new construction and retrofit projects. Interviewee: Ken Levenson, with NY Passive House Assoc and 475.