F - Mech Eng,Light,Heat,Weapons – 24 – B
Patent
F - Mech Eng,Light,Heat,Weapons
24
B
126/96
F24B 7/00 (2006.01) F23J 13/02 (2006.01) F23L 15/04 (2006.01) F24B 5/02 (2006.01)
Patent
CA 1260786
ABSTRACT A heating system comprising a firebox defining a combustion cham- ber that is substantially sealed from the atmosphere. The system includes a flue for conducting combustion gases from the combustion chamber. A first duct surrounds the flue and defines an inner passageway with respect thereto. A second duct surrounds the first duct and defines an outer passageway, An inlet means is provided for introducing ambient air into the outer passageway. The air in the outer passagewayS is drawn through the inner passageway by a negative pressure in the combustion chamber. The ambient air in the inner and outer passageways is heated by heat transmitted from the flue. This heated ambient air is then introduced in the combustion chamber to improve the efficiency of combustion.
474714
Robertson Andrew S.
Smart & Biggar
LandOfFree
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