Airtight isn’t really the best way to describe it. Rather it’s controlled air exchange, this way instead of 1000 tiny leaks all over you have a central controlled means to exchange air.
Passive home typically have ERVs or HRVs (Energy/Heat Recovery Ventilators) to achieve this, they can control the heat/humidity in the air.
Considering the number of people who have lived safely like this for years, and that some places (Massachusetts, USA) require it for apartment buildings/multi family units, makes me think it’s pretty well understood
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Airtight isn’t really the best way to describe it. Rather it’s controlled air exchange, this way instead of 1000 tiny leaks all over you have a central controlled means to exchange air.
Passive home typically have ERVs or HRVs (Energy/Heat Recovery Ventilators) to achieve this, they can control the heat/humidity in the air.
Has to be some kind of air exchanger
Sounds more dangerous than it’s worth.
Considering the number of people who have lived safely like this for years, and that some places (Massachusetts, USA) require it for apartment buildings/multi family units, makes me think it’s pretty well understood
Here is a schematic I found on the Swedish version of this article: https://upload.wikimedia.org/wikipedia/commons/0/00/Passive_House_scheme_1_multilingual.svg
I suspect not all passive houses are built in this except way though.
The WSJ article has a diagram explaining the air stuff