Filter Hut's Accumulair brand 20x20x4 air filter is specifically built to be compatible with similarly sized 20x20x4 air filter style. Pleated static charged media captures airborne contaminants relative to its ASHRAE MERV rating. Free of chemicals. Notice: Sample filter picture as shown is not to scale and is included to show style only. Current stock and 20x20x4 air filter variations are up to date as of 03/24/2020.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
- Our current lead times are 3-5 business days for stocked filters (standard 1"-5" thick sizes), up to 3 weeks for made-to-order filters (non-standard and 0.5" sizes).
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
Payment & Security
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