Our Accumulair 11.5x21x0.5 air filter is specifically designed to replace similarly sized 11.5x21x0.5 air filter specification. Pleated static charged filter material captures contaminants in the air relative to its ASHRAE MERV rating. Chemical free. Notice: The sample filter image displayed is not the actual dimensions and is shown for design purposes only. Database and 11.5x21x0.5 air filter statements are up to date as of 03/24/2020.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
- Orders take 1-3 business days to process.
(Custom & bag filters take 5-7 business days.)
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.