Can we talk about how I used to eyeball my furnace filter and now I have a $9 magnet on the return duct

Lily Torres · 2026-10-08T19:10:03.104442+00:00

For 4 winters in my Red Deer bungalow I just swapped the filter whenever I remembered, but after a $410 repair bill the tech showed me a magnetic filter minder that tells me exactly when it's clogged, so does anyone else use one of these or am I just late to the party?

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Can we talk about how I used to eyeball my furnace filter and now I have a $9 magnet on the return duct | Alberta Homeowners - Free To Speak