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    Ruud Compatible Air Filter Replacements

    Filterbuy replacement air filters offer the same high quality materials and performance as the name brand but at a fraction of the cost.

    CUSTOMER REVIEW

    5star

    Absolutely the best and most efficient way to purchase furnace filters! No problem finding the filter I needed, filters delivered within a couple of days, fit perfectly and shipping is FREE! What's not to like?

    Christine P.

    filter 17.5 X 21 X 4.5 - MERV 11
    17.5 X 21 X 4.5 - MERV 11
    Actual: 17.25x20.75x4.38"
    Designed to Fit:
    RXHF-E17AM10 RXHF-E17AM13

    MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour

    $63.25 ea

    as low as $ 39.52 when you buy 2 or more

    filter 21 X 21 X 4.5 - MERV 11
    21 X 21 X 4.5 - MERV 11
    Actual: 20.75x20.75x4.38"
    Designed to Fit:
    RXFH-E21AM10 RXFH-E21AM13

    MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour

    $66.74 ea

    as low as $ 41.69 when you buy 2 or more

    filter 21 X 24.5 X 4.5 - MERV 11
    21 X 24.5 X 4.5 - MERV 11
    Actual: 20.75x24.25x4.38"
    Designed to Fit:
    RXHF-E24AM10 RXHF-E24AM13

    MERV 11 - filters pollen, dust mites, mold, auto emissions, and large particles like milled flour

    $46.39 ea

    as low as $ 42.09 when you buy 2 or more