Rheem RGTC (downflow/horizontal 95%) furnace filter sizes
RGTC (downflow/horizontal 95%) furnaces take 12 x 20 or 14 x 20 filters, depending on cabinet width and return.
Pick your full model number below for the exact size.
2 filters, each 12 x 20 (downflow top (standard filter, 2 pcs) return)
2 filters, each 14 x 20 (downflow top (standard filter, 2 pcs) return)