Filter Hut's Accumulair 18x36x4 air filter is solely made to substitute for same sized 18x36x4 air filter style. Pleated static charged filter material traps contaminants in the air according to the MERV standard specification. Chemical free. Notice: The example filter image as shown is not the actual dimensions and is included to show style purposes. Catalog and 18x36x4 air filter statements last updated on 03/24/2020.
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