| AFUE | : | 83 % |
| BTU Heating Input Rating (Custom) | : | 84,000 BTU/h |
| BTU Heating Input Rating | : | 86,000 BTU/h |
| BTU Heating Output Rating (Custom) | : | 72,000 BTU/h |
| BTU Heating Output Rating | : | 71,000 BTU/h |
| ENERGY STAR Certified | : | No |
| MBH | : | 86 MBH |
| Model Number | : | M5SB |
| Product Family | : | M5 Series |