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Simple Venturi Pipe Keeps Home Cool
There's an 8-in. dia. black stove pipe sticking out of the back of Roy Gottfried's home in Tampa, Florida. It looks like it should lead to a stove inside the house. But it's actually designed to cool the home, acting with a venturi pipe at the top that draws warm air out of the home and pulls cool air up from under the house.
  The sun keeps the black pipe very warm. As hot air rises, it passes through the narrowing pipe at the top, and then expands quickly as it exits, creating a strong upward draft. Meanwhile, cool air under the house is pulled through an 8-in. dia. opening in the floor and into the house.
  "It saves money because the air conditioner doesn't have to operate as often, and it also brings in fresh air that's better to breathe," says Gottfried. "During cool weather I install a cap on the pipe."
  Contact: FARM SHOW Followup, Ray D. Gottfried, 8904 Sheldon West Dr., Tampa, Florida 33626 (ph 813 792-1373; rgottfri@ tampabay.rr.com).

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2009 - Volume #33, Issue #3