
05/21/11, 01:46 PM
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Join Date: Jun 2010
Location: W. Oregon
Posts: 8,754
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I have one. It cools in summer and the thermal mass of the 2'x4' concrete block chimney is used to heat in the winter. It takes in cool air from the earth under the house during the warm season, rises and enters a collector tray inside the chimney, a small 12 volt fan moves the cool air back down near the floor of the bedroom and living area. Near the ceiling warm air reenters the chimney and is then exhausted outside. In the winter we close off the intake from the crawl space and open a duct from the solar heater, the warm air rises to the tray collector where the small fan recirculates the warm air back near the floor of the bedroom and living area. In cold weather a quick fire in the wood stove in the morning to heat water warms the mass of the chimney, another 2 hour fire in the evening is all we need to keep confortable all night in the 400 sq ft cabin....James
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