Conditioned attic “venting”
I’m building a house in Climate Zone 2A (Hot/Humid) and it will have open cell spray foam on the walls and roof deck. In order to control the humidity levels in the attic, it is suggested that a supply duct from the HVAC be installed in the attic. Alternatively, air can be supplied to the attic by a fan blowing air from the occupiable space into the attic. The physical installation of the fan blowing air into the attic seems straightforward, but my question is about the location the air intake in the “occupiable” space and the location of the exhaust into the attic. Where would the best place to pull air from (closet, living room, etc.)? Does it matter where the air is exhausted into the attic (near the highest point on the roof, opposite side of the house from the HVAC return, etc.).
GBA Detail Library
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