| AFUE | : | 92 % |
| Air Flow Direction | : | Upflow~Downflow~Horizontal~Multi-Position |
| BTU Heating Input Rating (Custom) | : | 42,000 BTU/h |
| BTU Heating Input | : | 42,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 42,000 BTU/h |
| BTU Heating Output | : | 39,900 BTU/h |
| CFM Airflow (Custom) | : | 1,144 CFM |
| CFM Airflow | : | 1,100 CFM |
| Communicating | : | No |
| Depth | : | 29.63 in |
| Energy Star Certified | : | Yes |
| Fuel Type | : | Natural Gas~Liquid Propane |
| Height | : | 34 in |
| Ignition Type | : | Direct Spark |
| MBH | : | 42 MBH |
| Model Number | : | R921T |
| Motor Type | : | Constant Torque ECM |
| Number of Stages | : | Single-Stage |
| Phase | : | 1 ph |
| Product Family | : | Endeavor Line Classic |
| Product Weight | : | 123 lbs |
| Shipping Weight | : | 123.5 lbs |
| Vent Type | : | Direct Vent~Concentric |
| Voltage Rating | : | 115 V |
| Width | : | 17.5 in |
The Rheem® Endeavor Line Classic Series R921T gas furnace provides reliable and efficient heating with a 92% AFUE rating. This single-stage unit is engineered to deliver consistent warmth for residential applications, making it a dependable choice for home comfort.Featuring a constant torque motor for steady airflow, this furnace ensures even temperature distribution. Its versatile 4-way multi-position design and compact 17.5-inch cabinet allow for flexible installation in upflow, downflow, or horizontal configurations, fitting easily into tight spaces like closets or attics.
- PlusOne® Diagnostics: Features an industry-first, 7-segment LED display for quick and straightforward service diagnostics.
- PlusOne® Ignition System: Utilizes a proven Direct Spark Ignition (DSI) system for consistent reliability and longevity.
- PlusOne® Water Management: Includes a patented blocked drain sensor that automatically shuts the furnace off and provides a diagnostic code to prevent potential water damage.
- Durable Heat Exchanger: Constructed with an aluminized steel primary heat exchanger and a stainless steel secondary heat exchanger for long-term performance.
- Installation Flexibility: Offers a 4-way multi-position design, supporting upflow, downflow, and horizontal left or right configurations to fit various applications.
- Efficient Airflow: Equipped with a constant torque motor to provide steady, even airflow for enhanced comfort.
