Unvented heating appliance having system for reducing undesirable combustion products
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United States of America Patent
Stats
-
Apr 17, 2001
Grant Date -
N/A
app pub date -
Mar 21, 1997
filing date -
Mar 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas-fueled heating appliance having a system for reducing the amount of undesirable combustion products released to the site in which the appliance is installed. The appliance includes a firebox partially surrounded by a heat exchanger. Ambient air is drawn into the heat exchanger below the firebox and a portion of the ambient air enters the firebox to assist in combustion, and the remaining portion travels through the heat exchanger to be heated by convection before being combined with combustion gases exiting through the top of the firebox. The heat exchanger creates a low pressure area relative to the firebox which induces a draft from the firebox into the heat exchanger and ultimately to the ambient environment through an exit provided above the firebox. A carbon monoxide catalyst element is provided in the exit passageway from the firebox to the heat exchanger to oxidize carbon monoxide into carbon dioxide and filter away airborne particulates which would otherwise be released to the ambient air.
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