Rheem RGRK (90 Plus Dual Comfort two-stage upflow) furnace filter sizes
RGRK (90 Plus Dual Comfort two-stage upflow) furnaces take 22.75 x 25 x 1 filters, depending on cabinet width and return.
Pick your full model number below for the exact size.
A 22.75 x 25 x 1 filter (single/any (factory permanent filter) return)