Fireplace insert heat exchanger

Details Fireplace insert heat exchanger Fireplace insert heat exchanger

F - Mech Eng,Light,Heat,Weapons

24

B

126/96

F24B 7/00 (2006.01)

Patent

CA 1129286

ABSTRACT OF THE DISCLOSURE A fireplace insert is disclosed which will efficiently heat the interior of a structure, enable control of fuel burn rate and temperature of heated air directed into the interior structure, and facilitate circulation of the heated air through the interior rooms of the structure via the pressure differential created by the forced-air flow through the insert. The unit includes an air-tight cover to the interior fireplace opening, a continuous heat exchanger across the top of the fireplace combustion chamber which continues down parallel to the rear of the fireplace combustion chamber and opens rearward to the outside air dual intake chamber which is equipped with a variable speed fan. The interior end of said heat exchanger mates with the forced air outlet in the air-tight cover to the fireplace opening. Said outside air dual intake chamber is equipped with a screen on the end opening to the outside of the structure, a butterfly damper between the fan and an intake shield adjacent to the fireplace combustion chamber, said shield having an air flow passage extending along the lower face of the combustion chamber and air flow exhaust into the front of the combustion chamber. The variable speed fan, which control the volume of air passing through the system, draws outside air and passes it under pressure into the dual chambers. The upper chamber leads to the heat exchanger unit and the lower chamber opens to the air flow passage under the combustion chamber. The butterfly valve, in the lower chamber, controls the burn rate of the fuel in the combustion chamber of the fireplace. This process yields a positive air pressure in the interior room created by the heated air, so that the warm air will pass freely into rooms adjacent to the one in which the fireplace is located.

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