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DIY: Whole House Fan insulation box for cold weather to prevent warm air from being pulled into the attic. Need to make a similar cover for the drop down ladder/stairs.

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from The Family Handyman

Choosing a Whole House Fan

Choosing a Whole House Fan: A time-tested cooling solution that uses 90% less energy than your air conditioner http://www.familyhandyman.com/heating-cooling/choosing-a-whole-house-fan/view-all

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