Origins of 4 Pa reference pressure for infiltration...

Does anyone know the origins or justification for the 4 Pa commonly used as a reference delta P across building enclosures, and was it intended for low-rise residential applications only? The earliest reference I can find is a couple 1980 papers by Sherman and Grimsrud, but I can't find a justification for it.

As I recall from my collage course: 4 Pa is the average pressure difference between indoor and outdoor (in mild wind conditions).

More information can be found in this post: https://unmethours.com/question/11481...

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banicu

answered 2017-05-03 00:47:03 -0500

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That post is good, but references the same paper, which doesn't hold the answer. I'm trying to find out why 4 Pa, and was that only intended for low rise. I have a feeling that there is no reasonable reference pressure for high-rise, because, it depends....