Actual Dimensions: 20.75 x 20.75 x 4.38. Accumulair brand: 21x21x4.5 Ruud RXHF-E21AM10 style whole house air filters, specifically engineered to substitute for the original manufacturer Ruud RXHF-E21AM10 filters. Completely box-formed with no forming or combs required. MERV rated to ASHRAE 52.2 test ratings establishing particulate capture equal to the name brand Ruud RXHF-E21AM10 air filters. Notice: The sample air filter image as displayed is not the actual dimensions and is included to show design purposes. OEM names and Ruud RXHF-E21AM10 identifier are listed for air filter replacement identification use.
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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