Filter Hut's Accumulair brand 16.25x21x4 air filter is exactly built to substitute for same sized 16.25x21x4 air filter specs. Pleated electrostatic charged media traps contaminants according to the MERV standard rating. Chemical free. Notice: The sample filter picture displayed is not to scale and is displayed for design purposes only. Current stock and 16.25x21x4 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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