Rheem RGRL furnace filter sizes
RGRL furnaces take 15.75 x 25 x 1 or 19.25 x 25 x 1 filters, depending on cabinet width and return.
Pick your full model number below for the exact size.
A 15.75 x 25 x 1 filter (single/any (factory permanent filter) return)
A 19.25 x 25 x 1 filter (single/any (factory permanent filter) return)