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Originally Posted by Drake
I can't see how a set ACH can be assigned to all spaces and all lifestyles in that space.
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ASHRAE's fresh air standards are actually more generous (regarding fresh air replacement volume) than Passive House, although over time, they have adjusted their air change rates down, closer to the 0.35 ACH passive house rate.
In general, for homes ASHRAE starts with 0.35 ACH and then adds extra air for more people and more activity, etc.
I'm sure that if you spent some time searching it out you could find the details on the base-line ACH value and also the adjustment factors... it's out there in the google-plex of web pages.
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Solar%20air%20heat%20-%20Wikipedia,%20the%20free%20encyclopedia.webarchi ve
Solar%20Buildings%20-%20Transpired%20Air%20Collectors,%20Ventilation%20 Preheating%20SolarWall%20News.webarchive
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Neither of these strings of characters lead to anything on the Internet. In other words, they are not legitimate URLs.
Best,
-AC