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Sensor for furnace air filter replacement (lemmy.world)

submitted 1 year ago by wetling@lemmy.world to c/homeassistant@lemmy.world

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Is anyone aware of a sensor (preferably Zigbee, I think), that will give me an idea of when I need to change my furnace air filter?

I am picturing something that maybe sits on the "clean" side of the filter to measure...pressure? Air quality? I don't know.

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[–] swampdownloader@lemmy.dbzer0.com 1 points 1 year ago

Not automated but you can get a radon manometer to identify pressure differentials. Install on both sides of the filter. Identify where pressure is with a new filter, mark it, and see how it changes over time and determine when to replace it.