Furnace filter indicator

Details Furnace filter indicator Furnace filter indicator

2006-12-13

2011-10-04

Greene, Jason M (Department: 1776)

Gas separation: apparatus

With signals, indicators, measuring, or testing means

Pressure measuring means

C095S019000, C096S417000, C116S212000, C340S611000, C340S626000

Reexamination Certificate

active

08029608

ABSTRACT:
A furnace filter indicator system comprises a pressure differential switch that monitors air pressure near a furnace filter, and a transmitter coupled to the pressure differential switch sends a signal to a receiver within a thermostat. The receiver includes an indicator for indicating the status of the furnace filter. If the pressure differential near the furnace filter triggers the switch, then the indicator will receive a “dirty” signal and will indicate that the furnace filter is dirty and should be replaced. The furnace filter indicator system is able to be installed on a previously installed furnace/thermostat system by utilizing the pre-existing wiring.

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