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The concept of a whole house fan is two fold. One is to bring in the cool evening air, the second is to flush out the hot air that is trapped in the attic. Your attic should already be vented enough to allow the incoming air a place to push the hot air out. If you where to make an opening for the fan to vent it, the cool air will just travel straight to ...


They chew, rather determinedly. Keeping them out when they want in is no small task, indeed. One approach with moderate success is to cover the opening with hardware cloth (heavy wire mesh) molded to fit and nailed carefully in place, and then spray foam. Board over the top if you like for appearances sake. The missing wood may well have been chewed away ...


You need to install a return air grill designed to have an air filter installed. This is much more convenient and more likely to get changed as a result. The placement of a filter in the unit in an attic is not a wise choice.


You could make an insulated panel that is spring-loaded to the open position. Keep it closed with door holder magnets like this .You could wire the fan and magnets to a double pole switch that cuts magnet power at the same time it turns on power to the fan. Might cost a bit and take some research... but it would be cool (pun intended)!


You're basically asking how to convert an unconditioned space into a conditioned space. This requires opening up the space to the existing conditioned part of the house and closing it off to the unconditioned space. I challenge your belief that it isn't vented. I suspect that it is vented - there will (or should) be some kind of air gap between the top ...

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