| AFUE | : | 92 % |
| Air Flow Direction | : | Upflow~Downflow~Horizontal~Multi-Position |
| BTU Heating Input Rating (Custom) | : | 54,000 BTU/h |
| BTU Heating Input | : | 56,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 54,000 BTU/h |
| BTU Heating Output | : | 53,200 BTU/h |
| CFM Airflow (Custom) | : | 1,331 CFM |
| CFM Airflow | : | 1,300 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 | : | 56 MBH |
| Model Number | : | R921T |
| Motor Type | : | Constant Torque ECM |
| Number of Stages | : | Single-Stage |
| Phase | : | 1 ph |
| Product Family | : | Endeavor Line Classic |
| Product Weight | : | 128 lbs |
| Vent Type | : | Direct Vent~Concentric |
| Voltage Rating | : | 115 V |
| Width | : | 17.5 in |
The Rheem® Endeavor Line Classic R921T is a single-stage gas furnace designed for dependable and efficient residential heating. It operates at 92% AFUE, providing consistent warmth while helping to reduce utility consumption.Built for versatility, this furnace can be installed in upflow, downflow, or horizontal configurations, making it a flexible solution for both new construction and retrofit applications. Its straightforward, non-communicating controls and robust design make it a reliable choice for professional installers.
- Advanced Diagnostics: Equipped with an industry-first, 7-segment LED display for quick and easy service calls.
- Reliable Ignition: Features a proven Direct Spark Ignition (DSI) system for dependable operation and longevity.
- Water Management: Includes the PlusOne® Water Management System with a patented sensor that shuts the furnace off if a drain is blocked, preventing water damage.
- Durable Heat Exchangers: Built with an aluminized steel primary heat exchanger and a stainless steel secondary heat exchanger for a long service life.
- Efficient Airflow: A constant torque ECM motor delivers reliable airflow while maintaining energy efficiency.
- ENERGY STAR® Certified: Meets ENERGY STAR® requirements for the U.S. South region, ensuring high efficiency performance.
