This Accumulair 17.5x23.5x4 air filter is exactly built to be a replacement for similarly sized 17.5x23.5x4 air filter specs. Pleated electrostatically charged filter material traps airborne substances relative to its ASHRAE MERV specification. Chemical free material. Note: The sample filter picture shown is not the actual dimensions and is displayed for construction purposes only. Current stock and 17.5x23.5x4 air filter specs are up to date as of 03/24/2020.
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