Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) vs Stove Builder International 2.1 Series (Destination 1.9
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 1.5 g/hr. The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) is the more efficient unit: 79% versus 75% HHV — more heat from every cord. The Stove Builder International 2.1 Series (Destination 1.9 produces more peak heat (31,700 vs 31,581 BTU/h), suiting roughly 900–1,250 sq ft. The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) has the larger firebox (1.32 vs 1.03 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 Stove Builder International 2.1 Series (Destination 1.9 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 40 Series: Green Mountain 40 (8640) | Stove Builder International 2.1 Series (Destination 1.9 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 1.1 g/hr | 1.5 g/hr |
| Efficiency (HHV) | 79 % | 75 % |
| Heat output (low) | 13876 BTU/h | 8500 BTU/h |
| Heat output (high) | 31581 BTU/h | 31700 BTU/h |
| Firebox volume | 1.32 cu ft | 1.03 cu ft |
| Carbon monoxide | 0.52 g/min | 0.6 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 | 299-22 |
| Covered model numbers | Green Mountain 40 Series: Green Mountain 40 (8640), Craftsbury 2 (8392), Hipster 14 (AMB8240) | 2.1 Series (Destination 1.9, Matrix 1900, CW2100, Green Mountain Insert 50, HEI90, Archway 1500, Blue Ridge 150-I) |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) or the Stove Builder International 2.1 Series (Destination 1.9?
The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640): 1.1 g/hr certified particulate emissions versus 1.5 g/hr for the Stove Builder International 2.1 Series (Destination 1.9.
Are the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) and Stove Builder International 2.1 Series (Destination 1.9 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.