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  azouwa  |  26

If the filter gets dirty enough it'll go off. The detectors can't tell the difference between dust and smoke. I have to clean my filters every few years with air duster for this reason.

  Neevster  |  18

I don't know why people are giving you the thumbs down. An excessive amount of dust actually is a fire risk, and if a fire starts there could be an explosion. That's why there have been devastating explosions in mills with lots of flour