HERS index and PHIUS
The zero energy ready home (ZERH) certification requires that you have a HERS index that is less than 50% of the HERS index of a model house of the same size and shape. I’m trying to get a rough idea of how this would compare to a house built to passive house standards.
Is there anyone out there who has built to passive house standards and also got a number for their HERS rating? I am curious to know how you fared on the HERS scale.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
This article is 10 years old, but it might be worthwhile to follow up with the author.
This house--Lessons From a Practical Passive House--got a HERS rating of 36. The builder, who has built a bunch of Passive Houses, wrote to me in an email, "We have found that PH's don't tend to get great HERS ratings- I'm not really too sure as to why this is."