Actual size is 20.75 x 20.75 x 4.38. Accumulair brand: 21x21x4.5 Rheem PD540018 style whole house filters, specifically constructed to replace the OEM Rheem PD540018 air filters. Completely box-formed - no forming or combs needed. MERV graded to ASHRAE ratings ensuring function to the level of the original brand Rheem PD540018 air filter. Photo: The sample filter image displayed is not the actual dimensions and is displayed for configuration purposes. OEM names and Rheem PD540018 P/N displayed for air filter replacement identification purposes only.
Shipping and Returns
- Shipping is FREE to the contiguous United States.
- Our current lead times are 3-5 days for stocked standard filters, and up to 24 days for non-standard, 0.5" , and bag filters.
Delivery normally takes another 1-3 days depending on location.
- 30-day 100% return policy.
Payment & Security
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