F - Mech Eng,Light,Heat,Weapons – 24 – F
Patent
F - Mech Eng,Light,Heat,Weapons
24
F
F24F 11/04 (2006.01) F23N 5/20 (2006.01) F24H 9/00 (2006.01) F24H 9/20 (2006.01)
Patent
CA 2125090
A two-stage furnace is operable at a high fire full rate mode and at a low fire partial rate mode when there is a call for high heat or low heat, respectively. In order for the furnace to be less prone to vent gas condensate formation when operating at low fire, and to permit the heat exchanger and vent pipe to reach equilibrium as soon as possible on both low fire and high fire, a shorter blower-on delay is provided for high fire and longer blower-on delay is provided on low fire.
Dempsey Daniel J.
Thompson Kevin D.
Carrier Corporation
Gowling Lafleur Henderson Llp
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