This Filter Hut Accumulair brand 13x21.5x4 air filter is exactly designed to substitute for same sized 13x21.5x4 air filter type. Pleated static charged media captures airborne particles according to the ASHRAE MERV specification. Free of chemicals. Notice: The sample filter picture shown is not to scale and is shown for design only. Catalog and 13x21.5x4 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.
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