Our Accumulair 21x21x1 air filter is exactly built to be compatible with similarly sized 21x21x1 air filter specs. Pleated electrostatic charged filter media captures airborne substances relative to its ASHRAE MERV rating. Chemical free material. Note: The sample filter image as shown is not to scale and is included to show construction purposes. Catalog and 21x21x1 air filter specs last verified on 03/24/2020.
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- Lead times vary and are listed at the top of the website. Non-standard sizes (custom, 0.5" thick, etc) take 3-4 weeks for delivery.
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- 30-day 100% return policy.
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