by Answerbag Staff on October 30th, 2009

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How often should a gas furnace filter be changed?

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  • by Kimberly Cobble on October 30th, 2009

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    Great Answer

    Professionally Researched. (What's this?)

    On average, a gas furnace filter should be changed every three months. However if there are smokers or pets in the home, or if the manufacturer of the furnace suggests it, filters should be changed more often.

    Source:

    Home Filtration Frequently Asked Questions

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