Hearthstone Quality Home Heating Products Green Mountain 80 8680 vs Jotul North America (Jotul U.S.A., Inc.) F35
The Hearthstone Quality Home Heating Products Green Mountain 80 8680 is the cleaner burner: 0.67 g/hr certified particulate emissions versus 1.2 g/hr. The Hearthstone Quality Home Heating Products Green Mountain 80 8680 is the more efficient unit: 81% versus 69% HHV — more heat from every cord. The Jotul North America (Jotul U.S.A., Inc.) F35 produces more peak heat (59,443 vs 33,396 BTU/h), suiting roughly 1,700–2,400 sq ft. The Hearthstone Quality Home Heating Products Green Mountain 80 8680 has the larger firebox (3.16 vs 1.57 cu ft), which generally means longer burns between reloads. Combustion technology differs: the Hearthstone Quality Home Heating Products Green Mountain 80 8680 is a hybrid and the Jotul North America (Jotul U.S.A., Inc.) F35 a non-catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| Hearthstone Quality Home Heating Products Green Mountain 80 8680 | Jotul North America (Jotul U.S.A., Inc.) F35 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 0.67 g/hr | 1.2 g/hr |
| Efficiency (HHV) | 81 % | 69 % |
| Heat output (low) | 15069 BTU/h | 13533 BTU/h |
| Heat output (high) | 33396 BTU/h | 59443 BTU/h |
| Firebox volume | 3.16 cu ft | 1.57 cu ft |
| Carbon monoxide | 0.23 g/min | 1.35 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | No |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 162-18 | 317-22 |
| Covered model numbers | Green Mountain 80 8680 | F35 |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 80 8680 or the Jotul North America (Jotul U.S.A., Inc.) F35?
The Hearthstone Quality Home Heating Products Green Mountain 80 8680: 0.67 g/hr certified particulate emissions versus 1.2 g/hr for the Jotul North America (Jotul U.S.A., Inc.) F35.
Are the Hearthstone Quality Home Heating Products Green Mountain 80 8680 and Jotul North America (Jotul U.S.A., Inc.) F35 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.