Brands › Rheem › RGTC (downflow/horizontal 95%)
Rheem RGTC-10ERBJS furnace filter size
This furnace takes 2 filters, each 14 x 20 (downflow top (standard filter, 2 pcs) return).
The maker lists width and height only. Most filter racks next to a furnace hold a 1-inch filter; a separate filter cabinet usually holds a 4- or 5-inch one. Check the thickness printed on the edge of your old filter before you order.
Every filter option for this model
| Where return air enters | Filter size (inches) | How many |
|---|---|---|
| downflow top (standard filter, 2 pcs) | 14 x 20 | 2 |
Where the filter goes
Doc lists "STANDARD FILTER (2) 12" x 20"" in physical data; external RXGF-CC rack note: "Filters shipped with furnace may be used".
The maker ships a filter with this furnace.
How often to change it
General guidance, not from the maker's table: 1-inch filters every 1 to 3 months; 4- and 5-inch filters every 6 to 12 months. Change sooner with pets, smoking or construction dust.
About this model
| Airflow direction | downflow/horizontal |
|---|---|
| Heat input | 105,000 BTU/hr |
| Efficiency (AFUE) | 95% |
How to read a Rheem model number
Source
- Rheem RGTC Series spec sheet, Form G11-526 (spec sheet, page 4): document. Read 2026-11-03.
- Rheem RGTC spec sheet, Form G11-502 (spec sheet, page 3): document. Read 2026-11-03.
Check that the model number on your furnace label matches, and compare with the size printed on your old filter. If they differ, go by the filter that fits your rack.