Four-stage high efficiency furnace

Details Four-stage high efficiency furnace Four-stage high efficiency furnace

F - Mech Eng,Light,Heat,Weapons

27

D

F27D 19/00 (2006.01)

Patent

CA 2612826

A four-stage furnace includes a gas flow control assembly operable to provide gas to the furnace at one of four firing rates. The furnace also includes a heat exchanger and an inducer blower for establishing a flow of combustion gas that generates a differential pressure across the heat exchanger. A furnace controller controls the rate at which the gas flow control assembly provides gas to the furnace and controls the inducer blower to establish one of four combustion gas flows that corresponds to one of the four firing rates.

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