This Accumulair brand 13x18x4 air filter is exactly constructed to replace same sized 13x18x4 air filter specification. Pleated electrostatically charged filter media captures airborne particles relative to its ASHRAE MERV rating. Free of chemicals. Note: The sample filter image as shown is not to scale and is included to show design purposes only. Database and 13x18x4 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.
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