At Lowes, Home Depot or any hardware store in the electrical area or the weatherstripping isle you will find a small box of white foam gaskets about the size of a wall switch plate. These things cost about 10 cents, but you wouldn't believe how much outside air that they will prevent from entering your home on the outside walls. At a home in Park City this morning before we powered up the blower doors for the energy audit we noticed these electrical outlets on the outside walls. The outside air temperature was 42 degrees, inside it was a toasty 70 and these plugs were venting in nice cool outside air.
Check around your outside wall plugs this weekend - it will surprise you.

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