Method and apparatus for regulating flue draft

Details Method and apparatus for regulating flue draft Method and apparatus for regulating flue draft

F - Mech Eng,Light,Heat,Weapons

23

L

126/90

F23L 11/00 (2006.01) F23N 3/00 (2006.01) F23N 3/04 (2006.01) F23N 3/08 (2006.01) F23N 5/18 (2006.01)

Patent

CA 1153260

METHOD AND APPARATUS FOR REGULATING FLUE DRAFT Abstract Method and apparatus for regulating the flue draft in heating systems including a combustion volume, a flue communicating with the combustion volume, and a vent opening between heated ambient air and the flue, the regulation being accomplished by sensing the flow of air through the vent into the flue, and modulating the setting of a down- stream damper to maintain such flow at a predetermined, positive but minimal value. A particularly preferred embodiment includes a temperature sensor positioned at the flue side of the vent and connected to a control system to maintain the damper at such a position that the temperature at such location is at a predetermined value above that of the ambient air temperature, and thus indicative of flow of ambient air into the flue at minimal values approaching incipient spillage of combustion gases at the vent.

373720

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