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Hearthstone vs Pacific Energy stoves: EPA test data compared
EPA test data checked
Hearthstone has 13 and Pacific Energy has 9 models certified for sale today. On the EPA's own tests, the typical Hearthstone model burns cleaner, and the typical Hearthstone model is more efficient.
| Hearthstone | Pacific Energy | |
|---|---|---|
| Models certified for sale now | 13 | 9 |
| Fuel | wood | pellet, wood |
| Catalytic models | 0 | 1 |
| Top heat output, smallest to biggest | 20,507 to 43,000 BTU/hr | 17,623 to 41,275 BTU/hr |
| Typical efficiency (middle model) | 79% | 73% |
| Typical smoke, as a share of the legal limit | 34% | 80% |
| Cleanest-burning model | Green Mountain 60-1 | True North 40 insert |
| Most efficient model | Green Mountain 60-1 | TN25 C |
| Biggest heater | WFP100 | Summit LE |
Closest head-to-head matchups
Each Hearthstone model paired with the Pacific Energy model nearest to it in top heat output, same fuel.
| Hearthstone | Heat / efficiency / smoke | Pacific Energy | Heat / efficiency / smoke |
|---|---|---|---|
| WFP100 | 43,000 / 64% / 1.6 | Summit LE | 41,275 / 74% / 1.8 |
| Green Mountain 40 Series | 31,581 / 79% / 1.1 | NEO 1.6 LE2 Model Line | 30,149 / 75% / 1.6 |
| Mansfield 8013 | 32,200 / 78% / 0.54 | NEO 1.6 LE2 Model Line | 30,149 / 75% / 1.6 |
| Heritage 8024 | 35,845 / 77% / 0.54 | Super LE | 38,177 / 71% / 1.8 |
| Green Mountain 60-1 | 35,571 / 81% / 0.51 | Super LE | 38,177 / 71% / 1.8 |
| Clydesdale 8492 | 32,588 / 79% / 1.16 | NEO 1.6 LE2 Model Line | 30,149 / 75% / 1.6 |
Heat in BTU an hour, smoke in grams an hour.
Every Hearthstone model on the EPA list
- WFP100: wood, 43,000 BTU/hr, 64% efficient, 1.6 g/hr smoke
- Heritage 8024: wood, 35,845 BTU/hr, 77% efficient, 0.54 g/hr smoke
- Green Mountain 60-1: wood, 35,571 BTU/hr, 81% efficient, 0.51 g/hr smoke
- Green Mountain 60 8660: wood, 33,576 BTU/hr, 79% efficient, 0.6 g/hr smoke
- Green Mountain 80-1: wood, 33,424 BTU/hr, 80% efficient, 0.53 g/hr smoke
- Green Mountain 80 8680: wood, 33,396 BTU/hr, 81% efficient, 0.67 g/hr smoke
- Manchester 8362: wood, 33,038 BTU/hr, 78% efficient, 0.65 g/hr smoke
- Clydesdale 8492: wood, 32,588 BTU/hr, 79% efficient, 1.16 g/hr smoke
- Mansfield 8013: wood, 32,200 BTU/hr, 78% efficient, 0.54 g/hr smoke
- Green Mountain 40 Series: wood, 31,581 BTU/hr, 79% efficient, 1.1 g/hr smoke
- Bari 8171, Bari Plus 8172: wood, 26,036 BTU/hr, 76% efficient, 0.94 g/hr smoke
- Castleton 8031: wood, 24,540 BTU/hr, 77% efficient, 0.98 g/hr smoke
- Lincoln 8060, Green Mountain 20: wood, 20,507 BTU/hr, 79% efficient, 1.1 g/hr smoke
Every Pacific Energy model on the EPA list
- Summit LE: wood, 41,275 BTU/hr, 74% efficient, 1.8 g/hr smoke
- Super LE: wood, 38,177 BTU/hr, 71% efficient, 1.8 g/hr smoke
- NEO 1.6 LE2 Model Line: wood, 30,149 BTU/hr, 75% efficient, 1.6 g/hr smoke
- NEO 2.5 LE2, NEO 2.5 Insert LE2: wood, 29,536 BTU/hr, 73% efficient, 1.6 g/hr smoke
- True North TN20 Series B: wood, 29,208 BTU/hr, 73% efficient, 1.6 g/hr smoke
- TN25 C: wood, 29,202 BTU/hr, 76% efficient, 1.1 g/hr smoke
- True North TN40: pellet, 27,949 BTU/hr, 72% efficient, 1.4 g/hr smoke
- True North 40 insert: pellet, 25,617 BTU/hr, 73% efficient, 0.69 g/hr smoke
- True North TN10: wood, 17,623 BTU/hr, 73% efficient, 1.4 g/hr smoke
This compares EPA lab results only. It says nothing about price, build quality, warranty or dealer support.
Source: EPA Certified Wood Heater Database, currently certified room heaters, checked Nov 1, 2026.