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.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
Due to shortages and demand the current lead time is up to 10 business days to process.
Orders take 1-3 business days to process.
(Custom & bag filters take 5-7 business days.)
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
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