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
- 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
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.