This Accumulair brand 14x28x4 air filter is solely built to substitute for same sized 14x28x4 air filter type. Pleated static charged filter material captures contaminants according to the ASHRAE MERV rating. Free of chemicals. Note: The example filter picture as shown is not to scale and is shown for construction only. Catalog and 14x28x4 air filter variations current as of 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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