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Replacement filter for Trane Perfect Fit BAYFTFR24MThe home air filters are listed in nominal size which is ½" larger than the actual size in height and width. Look at your existing filter, most filters have the size printed on the side, this is the size you should order.If your existing filter has no size printed on it, simply measure the existing filters' width and height.. The filter you will want is listed at ½" larger in height and width.If you don't have an existing filter, measure the opening for the filter in your air grill space. The nominal sized filter you should order is 1/2" larger in height and width than the air grill space.The nominal filter size measures 1/2" larger in height and width than the air grill filter opening. For example if your air grill opening where the filter goes measures 19 1/2" x 19 1/2" you should order a standard 20"x20" filter.
Ensure You Order the Correct Size Filter:
For superior residential filtration use the Alen Airnamic Merv 11 - this pleated filter is rated to control allergens, fine particles, dust, large particles, pollen, dust mites, mold spores, pet allergens and smog particles.