Filter Hut's Accumulair brand 18x25x4 air filter is specifically designed to replace similarly sized 18x25x4 air filter specification. Pleated electrostatically charged media traps airborne substances according to the MERV standard rating. Chemical free material. Notice: The sample filter image as shown is not to scale and is included to show style purposes only. Database and 18x25x4 air filter specs 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.