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Jotul vs Morso stoves: EPA test data compared
EPA test data checked
Jotul has 6 and Morso has 5 models certified for sale today. On the EPA's own tests, the typical Jotul model burns cleaner, and the typical Jotul model is more efficient.
| Jotul | Morso | |
|---|---|---|
| Models certified for sale now | 6 | 5 |
| Fuel | wood | wood |
| Catalytic models | 3 | 0 |
| Top heat output, smallest to biggest | 23,415 to 59,443 BTU/hr | 19,067 to 43,499 BTU/hr |
| Typical efficiency (middle model) | 77% | 73% |
| Typical smoke, as a share of the legal limit | 40% | 90% |
| Cleanest-burning model | F445 | 5660 B, 5600 B Standard |
| Most efficient model | F 500 V3 | 6100 B Series |
| Biggest heater | F35 | 5660 B, 5600 B Standard |
Closest head-to-head matchups
Each Jotul model paired with the Morso model nearest to it in top heat output, same fuel.
| Jotul | Heat / efficiency / smoke | Morso | Heat / efficiency / smoke |
|---|---|---|---|
| F602 V3 | 23,415 / 77% / 1.4 | 7110 C | 23,449 / 73% / 1.5 |
| F 500 V3 | 38,804 / 78% / 0.5 | 5660 B, 5600 B Standard | 43,499 / 71% / 1.2 |
| F445 V2 | 36,986 / 77% / 0.65 | 5660 B, 5600 B Standard | 43,499 / 71% / 1.2 |
| C550 V2 | 36,214 / 77% / 1.1 | 5660 B, 5600 B Standard | 43,499 / 71% / 1.2 |
| F445 | 35,722 / 72% / 0.49 | 3112B, 3142B | 28,000 / 68% / 1.9 |
| F35 | 59,443 / 69% / 1.2 | 5660 B, 5600 B Standard | 43,499 / 71% / 1.2 |
Heat in BTU an hour, smoke in grams an hour.
Every Jotul model on the EPA list
- F35: wood, 59,443 BTU/hr, 69% efficient, 1.2 g/hr smoke
- F 500 V3: wood, 38,804 BTU/hr, 78% efficient, 0.5 g/hr smoke
- F445 V2: wood, 36,986 BTU/hr, 77% efficient, 0.65 g/hr smoke
- C550 V2: wood, 36,214 BTU/hr, 77% efficient, 1.1 g/hr smoke
- F445: wood, 35,722 BTU/hr, 72% efficient, 0.49 g/hr smoke
- F602 V3: wood, 23,415 BTU/hr, 77% efficient, 1.4 g/hr smoke
Every Morso model on the EPA list
- 5660 B, 5600 B Standard: wood, 43,499 BTU/hr, 71% efficient, 1.2 g/hr smoke
- 3112B, 3142B: wood, 28,000 BTU/hr, 68% efficient, 1.9 g/hr smoke
- 1410B, 1440B, 1450B: wood, 24,733 BTU/hr, 73% efficient, 1.8 g/hr smoke
- 7110 C: wood, 23,449 BTU/hr, 73% efficient, 1.5 g/hr smoke
- 6100 B Series: wood, 19,067 BTU/hr, 74% efficient, 1.8 g/hr smoke
This compares EPA lab results only. It says nothing about price, build quality, warranty or dealer support.
Source: EPA Certified Wood Heater Database, currently certified room heaters, checked Nov 1, 2026.