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this post was submitted on 07 Aug 2023
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Today I Learned
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They aren't "airtight", that would awful. They are well-insulated and designed to take advantage of passive solar heating and air exchange cooling. The way roofs and windows and orientation on the land is usually done for western homes is just terribly inefficient for capturing and releasing heat in the right ways. Just some thick walls, a bank of windows facing the sunrise ,and some proper roof vents that can be opened when it's hot is all most passive houses really are.
I'd bet money that won't work well here in the southwest USA where it's been above 110F (43C) for almost 60 days in a row and above 115F (46C) for almost 30 days in a row.
Where in the southwest? I looked at Phoenix for a quick comparison -- highs from 108F to 111F for the past week...but lows ranged from 82F to 93F.
What actually comes to mind is Pueblo houses. Isn't this passive house just an expansion on that concept?