Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) vs Jotul North America (Jotul U.S.A., Inc.) C550 V2
Both stoves carry the same certified emission rate: 1.1 g/hr. The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) is the more efficient unit: 79% 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 31,581 BTU/h), suiting roughly 1,050–1,450 sq ft. The Jotul North America (Jotul U.S.A., Inc.) C550 V2 has the larger firebox (1.9 vs 1.32 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) is a hybrid and the Jotul North America (Jotul U.S.A., Inc.) C550 V2 a catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) | Jotul North America (Jotul U.S.A., Inc.) C550 V2 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.1 g/hr | 1.1 g/hr |
| Efficiency (HHV) | 79 % | 77 % |
| Heat output (low) | 13876 BTU/h | 11757 BTU/h |
| Heat output (high) | 31581 BTU/h | 36214 BTU/h |
| Firebox volume | 1.32 cu ft | 1.9 cu ft |
| Carbon monoxide | 0.52 g/min | 0.3 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 210-19 | 394-25 |
| Covered model numbers | Green Mountain 40 Series: Green Mountain 40 (8640), Craftsbury 2 (8392), Hipster 14 (AMB8240) | C550 V2 |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) or the Jotul North America (Jotul U.S.A., Inc.) C550 V2?
They are tied: both are certified at 1.1 g/hr of particulates.
Are the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) and Jotul North America (Jotul U.S.A., Inc.) C550 V2 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.