How do I know If my HVAC Air filter is dirty or not?

14 Answers

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  • 1 month ago

    you been through how many years of education?

  • 1 month ago

    A visual inspection is usually sufficient

  • 1 month ago

    Look at it. You'll get 1 to 3 months out of a filter. The cleaner the filter the more efficient your unit will run and the less stress you unit will be under which will help extend its life.  

  • R K
    Lv 7
    1 month ago

    hold it up and look at it. if you can't see through it, it's dirty

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  • 1 month ago

    Visual inspection.  

  • 1 month ago

    you take it out of its slot, hold it up toward the light and look at it.  since you'll have [one assumes] a new, clean filter of correct size handy, you can compare the two ...  -- grampa

  • Droopy
    Lv 5
    1 month ago

    Look at it.   You'll get 1 to 3 months out of a filter. The cleaner the filter the more efficient your unit will run and the less stress you unit will be under which will help extend its life.  Its lot cheaper to replace your filters "to soon" than replace your system earlier than needed.

  • Anonymous
    1 month ago

    Turn it on. If you look like an extra from Porgy and Bess after a few minutes, it is time to clean it.

  • 1 month ago

    if you can use a spoon and scoop up dust on to the spoon

  • Anonymous
    1 month ago

    Shine a light on one side of the filter in a dark room.  If you cannot see the light on the other side, the filter is dirty and needs to be replaced.

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