Air circulation system
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United States of America Patent
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Jun 13, 2006
Grant Date -
Apr 15, 2004
app pub date -
May 27, 2003
filing date -
Jul 19, 2002
priority date (Note) -
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Abstract
An air circulation system for use with or without ductwork having an outside air stream and a return air stream includes a controller and a return damper apparatus operatively connecting the return air stream to the controlled environment. The air circulation system further includes a heating unit and an air mass sensor disposed adjacent to the return damper apparatus. The air mass sensor selectively and directly detecting a ventilation rate of air moving through the return damper apparatus and communicates the ventilation rate to the controller which selectively modulates operation of the heating unit in dependence upon the ventilation rate.
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