Blocked flue detection methods and systems

Details Blocked flue detection methods and systems Blocked flue detection methods and systems

2007-08-14

2007-08-14

Norman, Marc (Department: 3744)

Automatic temperature and humidity regulation

Thermostatic

Hot and cold

C431S022000, C431S024000, C431S075000

Reexamination Certificate

active

10698882

ABSTRACT:
The present invention is directed at systems and methods for detecting flue blockages in an HVAC system without the addition of numerous additional sensor elements, wiring, and connections that can unduly increase the cost and possibly reduce the reliability of the HVAC system. In an illustrative embodiment of the present invention, changes in the output of a flame sensor are used to detect when a likely flue blockage exists.

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