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Community and Q&A

HERS index and PHIUS

harrison55 | Posted in General Questions on

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.

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  1. user-2310254 | | #1

    This article is 10 years old, but it might be worthwhile to follow up with the author.

  2. GBA Editor
    Brian Pontolilo | | #2

    Hi Mark.

    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."

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