Jotul North America (Jotul U.S.A., Inc.) C550 V2 vs Kuma Stove And Iron Works K-251 Series: Ashwood LE-1
Both stoves carry the same certified emission rate: 1.1 g/hr. The Kuma Stove And Iron Works K-251 Series: Ashwood LE-1 is the more efficient unit: 78% versus 77% HHV — more heat from every cord. The Jotul North America (Jotul U.S.A., Inc.) C550 V2 produces more peak heat (36,214 vs 30,612 BTU/h), suiting roughly 1,050–1,450 sq ft. The Kuma Stove And Iron Works K-251 Series: Ashwood LE-1 has the larger firebox (2.56 vs 1.9 cu ft), which generally means longer burns between reloads.
| Jotul North America (Jotul U.S.A., Inc.) C550 V2 | Kuma Stove And Iron Works K-251 Series: Ashwood LE-1 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.1 g/hr | 1.1 g/hr |
| Efficiency (HHV) | 77 % | 78 % |
| Heat output (low) | 11757 BTU/h | 11219 BTU/h |
| Heat output (high) | 36214 BTU/h | 30612 BTU/h |
| Firebox volume | 1.9 cu ft | 2.56 cu ft |
| Carbon monoxide | 0.3 g/min | 0.49 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 394-25 | 357-23 |
| Covered model numbers | C550 V2 | K-251 Series: Ashwood LE-1, Wood Classic LE-1, Cambridge LE-1, Cascade LE-1 |
Frequently asked questions
Which burns cleaner, the Jotul North America (Jotul U.S.A., Inc.) C550 V2 or the Kuma Stove And Iron Works K-251 Series: Ashwood LE-1?
They are tied: both are certified at 1.1 g/hr of particulates.
Are the Jotul North America (Jotul U.S.A., Inc.) C550 V2 and Kuma Stove And Iron Works K-251 Series: Ashwood LE-1 both EPA certified?
Yes — both appear on the U.S. EPA's current list of certified wood heaters, and every figure on this page comes from their certification records.