Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) vs Stove Builder International Bistro Series (Bistro
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 2 g/hr. The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) is the more efficient unit: 79% versus 76% HHV — more heat from every cord. The Stove Builder International Bistro Series (Bistro produces more peak heat (50,200 vs 31,581 BTU/h), suiting roughly 1,450–2,000 sq ft. The Stove Builder International Bistro Series (Bistro has the larger firebox (2.26 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 Stove Builder International Bistro Series (Bistro 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 Bistro Series (Bistro | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 1.1 g/hr | 2 g/hr |
| Efficiency (HHV) | 79 % | 76 % |
| Heat output (low) | 13876 BTU/h | 14300 BTU/h |
| Heat output (high) | 31581 BTU/h | 50200 BTU/h |
| Firebox volume | 1.32 cu ft | 2.26 cu ft |
| Carbon monoxide | 0.52 g/min | 1 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 | 337-22 |
| Covered model numbers | Green Mountain 40 Series: Green Mountain 40 (8640), Craftsbury 2 (8392), Hipster 14 (AMB8240) | Bistro Series (Bistro, Gusto, Pyra, 600, HEC240, IW600) |
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 Bistro Series (Bistro?
The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640): 1.1 g/hr certified particulate emissions versus 2 g/hr for the Stove Builder International Bistro Series (Bistro.
Are the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) and Stove Builder International Bistro Series (Bistro 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.