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
- Our current lead times are 6-8 business days for standard filters (1"-6" thick sizes), and up to 10-14 business days for made-to-order filters (non-standard and 0.5" sizes). Delivery normally takes another 1-3 days depending on location.
- Shipping is FREE to the contiguous United States.
- 30-day 100% return policy.
Payment & Security
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