Furnace filter indicator
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United States of America Patent
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Oct 4, 2011
Grant Date -
N/A
app pub date -
Dec 13, 2006
filing date -
Dec 13, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
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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