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Lopi vs Regency stoves: EPA test data compared
EPA test data checked
Lopi has 8 and Regency has 8 models certified for sale today. On the EPA's own tests, the typical Regency model burns cleaner, and the typical Lopi model is more efficient.
| Lopi | Regency | |
|---|---|---|
| Models certified for sale now | 8 | 8 |
| Fuel | pellet, wood | wood |
| Catalytic models | 2 | 6 |
| Top heat output, smallest to biggest | 31,641 to 47,138 BTU/hr | 24,488 to 36,398 BTU/hr |
| Typical efficiency (middle model) | 80% | 78% |
| Typical smoke, as a share of the legal limit | 60% | 55% |
| Cleanest-burning model | Rockport NexGen-Hybrid | F5200 |
| Most efficient model | Answer NexGen Hybrid | F5200 |
| Biggest heater | Liberty NexGen-Hybrid | F5200 |
Closest head-to-head matchups
Each Lopi model paired with the Regency model nearest to it in top heat output, same fuel.
| Lopi | Heat / efficiency / smoke | Regency | Heat / efficiency / smoke |
|---|---|---|---|
| Evergreen NexGen-Hybrid Free-Standing | 31,641 / 77% / 1.2 | F3500B-1 | 30,659 / 76% / 1.1 |
| Endeavor NexGen-Hybrid | 31,922 / 80% / 1.2 | Alterra Pro I3000 Series (I300R, I300A) | 33,155 / 78% / 0.95 |
| Answer NexGen Hybrid | 38,594 / 80% / 1.4 | F5200 | 36,398 / 80% / 0.84 |
| Rockport NexGen-Hybrid | 42,722 / 80% / 0.73 | F5200 | 36,398 / 80% / 0.84 |
| Liberty NexGen-Hybrid | 47,138 / 80% / 0.9 | F5200 | 36,398 / 80% / 0.84 |
Heat in BTU an hour, smoke in grams an hour.
Every Lopi model on the EPA list
- Liberty NexGen-Hybrid: wood, 47,138 BTU/hr, 80% efficient, 0.9 g/hr smoke
- Rockport NexGen-Hybrid: wood, 42,722 BTU/hr, 80% efficient, 0.73 g/hr smoke
- Answer NexGen Hybrid: wood, 38,594 BTU/hr, 80% efficient, 1.4 g/hr smoke
- Deerfield II: pellet, 37,118 BTU/hr, 80% efficient, 1.5 g/hr smoke
- AGP PS: pellet, 34,738 BTU/hr, 76% efficient, 1.8 g/hr smoke
- AGP Insert: pellet, 33,686 BTU/hr, 76% efficient, 0.98 g/hr smoke
- Endeavor NexGen-Hybrid: wood, 31,922 BTU/hr, 80% efficient, 1.2 g/hr smoke
- Evergreen NexGen-Hybrid Free-Standing: wood, 31,641 BTU/hr, 77% efficient, 1.2 g/hr smoke
Every Regency model on the EPA list
- F5200: wood, 36,398 BTU/hr, 80% efficient, 0.84 g/hr smoke
- Alterra Pro I3000 Series (I300R, I300A): wood, 33,155 BTU/hr, 78% efficient, 0.95 g/hr smoke
- F3500B-1: wood, 30,659 BTU/hr, 76% efficient, 1.1 g/hr smoke
- F2450-2, i2450-2, Hi2450-2: wood, 29,986 BTU/hr, 70% efficient, 1.6 g/hr smoke
- F2500-1, I2500-1: wood, 29,795 BTU/hr, 78% efficient, 1.4 g/hr smoke
- F1150-1, i1150-1, Ci1150-1, Hi1150-1: wood, 27,353 BTU/hr, 71% efficient, 1.3 g/hr smoke
- CI2700-1, HI500-1: wood, 27,168 BTU/hr, 77% efficient, 1.1 g/hr smoke
- F1500, I1500: wood, 24,488 BTU/hr, 78% efficient, 1.0 g/hr smoke
Lopi stoves are certified under Travis Industries; we matched models by name. 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.