Rheem RGRA/RGRB (Classic 90 Plus upflow) furnace filter sizes
RGRA/RGRB (Classic 90 Plus upflow) furnaces take 15.75 x 25 or 15.75 x 25 x 1 or 19.25 x 25 or 19.25 x 25 x 1 or 22.75 x 25 or 22.75 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) or a 15.75 x 25 filter (bottom (RXGF-CB external rack) return) or a 15.75 x 25 filter (side (RXGF-CA external side rack) return)
A 19.25 x 25 x 1 filter (single/any (factory permanent filter) return) or a 19.25 x 25 filter (bottom (RXGF-CB external rack) return) or a 15.75 x 25 filter (side (RXGF-CA external side rack) return)
A 22.75 x 25 x 1 filter (single/any (factory permanent filter) return) or a 22.75 x 25 filter (bottom (RXGF-CB external rack) return) or a 15.75 x 25 filter (side (RXGF-CA external side rack) return)
A 15.75 x 25 x 1 filter (single/any (factory permanent filter) return) or a 19.25 x 25 filter (bottom (RXGF-CB external rack) return) or a 15.75 x 25 filter (side (RXGF-CA external side rack) return)