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Light Switches Can Be Big Sources of Leaks

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Here's an interesting video from our friends at Energy Vanguard that shows how much air can leak through simple things like light switches.

Video: Interior Air Sealing for Maximum Energy Efficiency

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This video, part of a series from the Oregon contractor Hammer & Hand, describes how to air seal the interior of a home to maximize the effectiveness of super energy efficient, European "Passive House" style windows.