I think I saw this on Ecorenovator: take a conventional dryer, create a sealed plenum around its air intake on the back, and route a duct from that up to the attic space. Sucks in the solar-heated air from the attic, uses it productively and then ejects it from the house. In the same exchange, cooler fresh air is actively pulled into the attic via the gable vent.
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Lead or follow. Either is fine.
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