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2Instructables108,229Views11CommentsJoined November 13th, 2007

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  • Cool Your House With Negative Pressure Ventilation - Not A/C

    It will definitely help. The goal is to get about 50% to 75% of the opening you're pointing at to be filled with air from the fan. The other 25% to 50% will be air that is carried along by the low pressure created by the stream of fan-driven air passing through the opening. As I read this, I'm not sure I'm making good sense. I can see it in my head but the words are failing me.

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