Our Accumulair brand 13x20x4 air filter is solely made to substitute for similarly sized 13x20x4 air filter specification. Pleated electrostatic charged filter media captures contaminants relative to its MERV rating. Free of chemicals. Notice: The example filter image displayed is not to scale and is shown for construction purposes. Database and 13x20x4 air filter statements last verified on 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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