Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) vs Pacific Energy Fireplace Products Limited NEO 2.5 LE2
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 73% HHV — more heat from every cord. The Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) produces more peak heat (31,581 vs 29,536 BTU/h), suiting roughly 900–1,250 sq ft. The Pacific Energy Fireplace Products Limited NEO 2.5 LE2 has the larger firebox (1.88 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 Pacific Energy Fireplace Products Limited NEO 2.5 LE2 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) | Pacific Energy Fireplace Products Limited NEO 2.5 LE2 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Hybrid | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.1 g/hr | 1.6 g/hr |
| Efficiency (HHV) | 79 % | 73 % |
| Heat output (low) | 13876 BTU/h | 13240 BTU/h |
| Heat output (high) | 31581 BTU/h | 29536 BTU/h |
| Firebox volume | 1.32 cu ft | 1.88 cu ft |
| Carbon monoxide | 0.52 g/min | 1.6 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | No |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 210-19 | 386-24 |
| Covered model numbers | Green Mountain 40 Series: Green Mountain 40 (8640), Craftsbury 2 (8392), Hipster 14 (AMB8240) | NEO 2.5 LE2, NEO 2.5 Insert LE2 |
Frequently asked questions
Which burns cleaner, the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) or the Pacific Energy Fireplace Products Limited NEO 2.5 LE2?
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 Pacific Energy Fireplace Products Limited NEO 2.5 LE2.
Are the Hearthstone Quality Home Heating Products Green Mountain 40 Series: Green Mountain 40 (8640) and Pacific Energy Fireplace Products Limited NEO 2.5 LE2 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.