This Filter Hut Accumulair brand 21.5x24x4 air filter is exactly constructed to replace similarly sized 21.5x24x4 air filter type. Pleated static charged filter material traps airborne substances according to the MERV standard rating. Chemical free material. Notice: The example filter picture displayed is not to scale and is included to show construction purposes only. Catalog and 21.5x24x4 air filter specs current as of 03/24/2020.
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