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In summer, the floor vent blows upward, while the ceiling vent lets out hot air. In winter, the ceiling vent blows downward, and the floor vent lets out cold air.
Smart window fan
http://www.halfbake...mart_20window_20fan
Same idea for external air. [phoenix, Oct 21 2004]
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<voice source="everyone"><Hardy>I have nothing to say.</Hardy></voice> |
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Where does the air come from? Go to? |
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The HVAC system. This uses the Heating/Air system that most homes already have; the idea is merely to switch the direction of the airflow depending on the temperature of the air being moved, as hot air tends to rise and cold air tends to fall. |
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