| AFUE | : | 92 % |
| Air Flow Direction | : | Upflow~Downflow~Horizontal~Multi-Position |
| BTU Heating Input Rating (Custom) | : | 72,000 BTU/h |
| BTU Heating Input | : | 70,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 72,000 BTU/h |
| BTU Heating Output | : | 66,500 BTU/h |
| CFM Airflow (Custom) | : | 1,312 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 | : | 70 MBH |
| Model Number | : | R921T |
| Motor Type | : | Constant Torque ECM |
| Number of Stages | : | Single-Stage |
| Phase | : | 1 ph |
| Product Family | : | Endeavor Line Classic |
| Product Weight | : | 133.5 lbs |
| Vent Type | : | Type B |
| Voltage Rating | : | 115 V |
| Width | : | 17.5 in |
The R921T Endeavor Line Classic Series furnace is a reliable and efficient solution for residential heating needs. It combines single-stage operation with a constant torque ECM motor to deliver consistent comfort and achieve a 92% AFUE rating.Designed for versatility, this unit can be installed in upflow, downflow, or horizontal configurations, making it adaptable to a variety of applications and job site constraints.
- PlusOne® Diagnostics: Features an industry-first, 7-segment LED display for quick and straightforward service calls.
- Reliable Ignition: Utilizes a proven Direct Spark Ignition (DSI) system for consistent startup and long-lasting performance.
- Water Management System: Includes a patented blocked drain sensor that shuts the furnace off and provides a diagnostic code to prevent water damage.
- Durable Heat Exchangers: Built with an aluminized steel primary heat exchanger and a 29-4c stainless steel secondary heat exchanger for long service life.
- Flexible Installation: Designed for 4-way multi-position installation (upflow, downflow, and horizontal) to accommodate various applications.
- Energy Efficiency: Offers 92% AFUE and is ENERGY STAR certified, helping to reduce utility costs.
