Actual dimensions are 16.63 x 26 x 4.13. Accumulair brand: 17x26x4 Lennox X6666 substitute whole house filters, exactly constructed to be an alternative to the OEM Lennox X6666 air filters. Fully box-formed so no forming or combs required. MERV classified to ASHRAE 52.2 test ratings assuring performance as good or better than the OEM Lennox X6666 filter. Notice: The sample filter picture displayed is not to scale and is included to show style only. OEM names and Lennox X6666 P/N are included for filter replacement identification purposes only. Catalog and specifications current as of 03/29/2020.
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(Custom & bag filters take 5-7 business days.)
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
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