You can crack a window if you loose power I guess. It's better than having a leaky house. how often do you loose power? I'm sure less often than the amount of time you have power. A ERV reclaims humidity. Panasonic makes a bath fan style ERV. Why I don't know as the bathroom is probably the absolute last place in a house where you'd want the humidity saved. Removing humidity is more than 1/2 the purpose of a bath fan.
One of the publicly funded programs out here used to install solar hot air gadgets that sound like what you're talking about. In the end they stopped because it was actually leading to higher energy costs. The reason was that the houses got tropical hot in the day and the occupants got used to it, keeping the thermostat way up at night.
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Chipping away on a daily basis.
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You know you're an ecorenovator if anything worth insulating is worth superinsulating.
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S-F: "What happens when you slam the door on a really tight house? Do the basement windows blow out?"
Green Building Guru: "You can't slam the door on a really tight house. You have to work to pull it shut."
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