Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) vs Woodstock Soapstone Company Fireview Soapstone Stove 205b
The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) is the cleaner burner: 1.1 g/hr certified particulate emissions versus 1.6 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 Woodstock Soapstone Company Fireview Soapstone Stove 205b produces more peak heat (56,499 vs 31,581 BTU/h), suiting roughly 1,600–2,250 sq ft. The Woodstock Soapstone Company Fireview Soapstone Stove 205b has the larger firebox (1.85 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 Woodstock Soapstone Company Fireview Soapstone Stove 205b 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) | Woodstock Soapstone Company Fireview Soapstone Stove 205b | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.1 g/hr | 1.6 g/hr |
| Efficiency (HHV) | 79 % | 77 % |
| Heat output (low) | 13876 BTU/h | 10590 BTU/h |
| Heat output (high) | 31581 BTU/h | 56499 BTU/h |
| Firebox volume | 1.32 cu ft | 1.85 cu ft |
| Carbon monoxide | 0.52 g/min | 0.9 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 | 397-25 |
| Covered model numbers | Green Mountain 40 Series: Green Mountain 40 (8640), Craftsbury 2 (8392), Hipster 14 (AMB8240) | Fireview Soapstone Stove 205b |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) or the Woodstock Soapstone Company Fireview Soapstone Stove 205b?
The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640): 1.1 g/hr certified particulate emissions versus 1.6 g/hr for the Woodstock Soapstone Company Fireview Soapstone Stove 205b.
Are the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) and Woodstock Soapstone Company Fireview Soapstone Stove 205b 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.