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
- 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
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