Our Accumulair 16x21x4 air filter is specifically made to be compatible with similarly sized 16x21x4 air filter style. Pleated electrostatic charged filter media traps contaminants in the air relative to its MERV standard rating. Chemical free. Note: Example filter image displayed is not the actual dimensions and is shown for style purposes only. Database and 16x21x4 air filter statements last updated on 03/24/2020.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
Due to shortages and demand the current lead time is up to 10 business days to process.
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
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