American Air Filter

American Air Filter

American Air Filter became AAF Flanders in April 2016, when American Air Filter Co. Inc., doing business as AAF International, acquired Flanders Corp. During this transition to the become the largest air filtration manufacturer of air filtration solutions they consolidated many models and re-branded many of the filters with new model names. As an authorized AAF Flanders retailer we have a large selection of replacement filters. If you don't see your old American Air Filter model listed please let us know and we can let you know what the recommended replacement filter is.

As with all furnace, HVAC and AC filters they are interchangeable with any brand as long as you replace with the same filter size. While we don't carry the American Air Filter brand since they are now AAF Flanders, we have a large selection of replacement air filters in the same standard sizes that perform just as well if not better.

Exact Fit Furnace and AC Filters

Brands are Interchangeable

When selecting an HVAC air filter, brand names are largely interchangeable—what truly matters is exact size, standard MERV efficiency rating, and proper fit. Any reputable filter performs equally well if it matches your system's precise dimensions and desired MERV level (avoid proprietary ratings like FPR or MPR; stick to MERV for accurate comparisons—MERV 8 for basic protection, up to MERV 13 for superior allergen capture). A poor fit allows unfiltered air to bypass, circulating dust and allergens while reducing system efficiency, which is why our Exact Filters® are custom-cut to 1/8-inch precision with a Filter Fit Guarantee™ for a perfect seal. Prioritize precise dimensions, the right MERV for your needs, and quality U.S.-made construction to ensure cleaner air, lower energy costs, and longer HVAC life—far more important than any brand logo.

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