Description
Actual Size: 20.75 x 20.75 x 4.38. Brand: Accumulair. 21x21x4.5 Rheem Protech 540012 replacement whole house filters, specifically engineered to be an alternative to the original manufacturer Rheem Protech 540012 air filters. Fully constructed so no forming or combs required. MERV graded to ASHRAE 52.2 test standards establishing performance equal to the name brand Rheem Protech 540012 filter. Note: Example filter picture as shown is not true to size and is displayed for style purposes. OEM names and Rheem Protech 540012 identifier shown for filter style identification purposes only.