FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R vs Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C
The FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R is the cleaner burner: 0.95 g/hr certified particulate emissions versus 1.3 g/hr. They tie on efficiency at 78% HHV. The FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R produces more peak heat (33,155 vs 25,471 BTU/h), suiting roughly 950–1,350 sq ft. The Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C has the larger firebox (3.25 vs 2.92 cu ft), which generally means longer burns between reloads.
| FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R | Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 0.95 g/hr | 1.3 g/hr |
| Efficiency (HHV) | 78 % | 78 % |
| Heat output (low) | 13794 BTU/h | 11974 BTU/h |
| Heat output (high) | 33155 BTU/h | 25471 BTU/h |
| Firebox volume | 2.92 cu ft | 3.25 cu ft |
| Carbon monoxide | 0.44 g/min | 1.46 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 376-24 | 212-19 |
| Covered model numbers | Alterra Pro I3000 Series (I300R, I300A) | Vermont Castings Defiant 1975-CAT-C |
Frequently asked questions
Which burns cleaner, the FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R or the Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C?
The FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R: 0.95 g/hr certified particulate emissions versus 1.3 g/hr for the Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C.
Are the FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R and Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C 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.