This Accumulair 16.25x21.25x4 air filter is exactly built to substitute for similarly sized 16.25x21.25x4 air filter type. Pleated electrostatic charged media captures airborne substances relative to its ASHRAE MERV specification. Chemical free material. Notice: The example filter picture shown is not the actual dimensions and is included to show design only. Current stock and 16.25x21.25x4 air filter specs are up to date as of 03/24/2020.
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