Filter Hut's Accumulair brand 19x21.5x4 air filter is solely made to substitute for same sized 19x21.5x4 air filter specs. Pleated electrostatically charged media captures contaminants according to the MERV rating. Chemical free. Note: The example filter image displayed is not the actual dimensions and is shown for design purposes only. Database and 19x21.5x4 air filter statements last updated on 03/24/2020.
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