A furnace filter should be changed about once every three months. A furnace filter should be changed more often in the event of pollen, construction dust, cold spells, or other amplifying factors.

Add Yahoo as a preferred source to see more of our stories on Google. A man kneels while pulling a dirty filter out of a furnace - Backyardproduction/Getty Images Changing your furnace filter is one ...

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Changing your furnace filter is one of those home maintenance chores that's easy to forget until you've got a problem. Typically located in tucked-away spots like a basement, crawlspace, or attic, ...

If you’re thinking you only have to change your furnace filter once a year, you may be shortening the life of your furnace.