Actual Dimensions: 20.75 x 20.75 x 4.38. Brand: Accumulair. 21x21x4.5 Rheem Protech 540012 compatible whole house air filters, exactly built to replace OEM Rheem Protech 540012 filters. Completely box-formed with no forming or combs required. MERV graded to ASHRAE 52.2 test specs establishing operation as good or better than the original manufacturer Rheem Protech 540012 air filter. Note: The example filter image shown is not true to size and is included to show style purposes only. Trade names and Rheem Protech 540012 part numbers are shown for filter replacement identification only.
Shipping and Returns
- Our current lead times are 6-8 business days for standard filters (1"-6" thick sizes), and up to 10-14 business days for made-to-order filters (non-standard and 0.5" sizes). Delivery normally takes another 1-3 days depending on location.
- Shipping is FREE to the contiguous United States.
- 30-day 100% return policy.