Filter Hut's Accumulair 25x28x4 air filter is solely constructed to be compatible with similarly sized 25x28x4 air filter specification. Pleated electrostatic charged filter media captures airborne particles according to the MERV specification. Free of chemicals. Notice: The sample filter picture as shown is not to scale and is shown for construction purposes. Database and 25x28x4 air filter statements last updated 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
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.