This Accumulair 18x30x4 air filter is solely constructed to substitute for same sized 18x30x4 air filter type. Pleated electrostatically charged filter material captures contaminants according to the ASHRAE MERV specification. Free of chemicals. Note: Example filter image shown is not to scale and is displayed for construction only. Database and 18x30x4 air filter statements last verified on 03/24/2020.
Shipping and Returns
- Lead times vary and are listed at the top of the website. Non-standard sizes (custom, 0.5" thick, etc) take 3-4 weeks for delivery.
- 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.