Hearthstone Quality Home Heating Products Green Mountain 80 8680 vs New Buck Corporation (Buck Stove Corp.) 21NC
The Hearthstone Quality Home Heating Products Green Mountain 80 8680 is the cleaner burner: 0.67 g/hr certified particulate emissions versus 1.7 g/hr. The Hearthstone Quality Home Heating Products Green Mountain 80 8680 is the more efficient unit: 81% versus 70% HHV — more heat from every cord. The Hearthstone Quality Home Heating Products Green Mountain 80 8680 produces more peak heat (33,396 vs 28,901 BTU/h), suiting roughly 950–1,350 sq ft. The Hearthstone Quality Home Heating Products Green Mountain 80 8680 has the larger firebox (3.16 vs 1.4 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 New Buck Corporation (Buck Stove Corp.) 21NC 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 | New Buck Corporation (Buck Stove Corp.) 21NC | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 0.67 g/hr | 1.7 g/hr |
| Efficiency (HHV) | 81 % | 70 % |
| Heat output (low) | 15069 BTU/h | 11079 BTU/h |
| Heat output (high) | 33396 BTU/h | 28901 BTU/h |
| Firebox volume | 3.16 cu ft | 1.4 cu ft |
| Carbon monoxide | 0.23 g/min | 6.1 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 | 66-16 |
| Covered model numbers | Green Mountain 80 8680 | 21NC |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 80 8680 or the New Buck Corporation (Buck Stove Corp.) 21NC?
The Hearthstone Quality Home Heating Products Green Mountain 80 8680: 0.67 g/hr certified particulate emissions versus 1.7 g/hr for the New Buck Corporation (Buck Stove Corp.) 21NC.
Are the Hearthstone Quality Home Heating Products Green Mountain 80 8680 and New Buck Corporation (Buck Stove Corp.) 21NC 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.