Filter Hut's Accumulair 17x21x4 air filter is specifically designed to be a replacement for similarly sized 17x21x4 air filter style. Pleated static charged filter media captures airborne contaminants according to the ASHRAE MERV rating. Free of chemicals. Notice: Sample filter picture shown is not the actual dimensions and is included to show style purposes only. Database and 17x21x4 air filter variations 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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