New Buck Corporation (Buck Stove Corp.) Model 91 vs Stove Builder International 1.4 Series (Osburn 950
The New Buck Corporation (Buck Stove Corp.) Model 91 is the cleaner burner: 1.3 g/hr certified particulate emissions versus 1.8 g/hr. The New Buck Corporation (Buck Stove Corp.) Model 91 is the more efficient unit: 80% versus 74% HHV — more heat from every cord. The New Buck Corporation (Buck Stove Corp.) Model 91 produces more peak heat (43,190 vs 26,500 BTU/h), suiting roughly 1,250–1,750 sq ft. The New Buck Corporation (Buck Stove Corp.) Model 91 has the larger firebox (3.07 vs 1.55 cu ft), which generally means longer burns between reloads. Combustion technology differs: the New Buck Corporation (Buck Stove Corp.) Model 91 is a catalytic stove and the Stove Builder International 1.4 Series (Osburn 950 a non-catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| New Buck Corporation (Buck Stove Corp.) Model 91 | Stove Builder International 1.4 Series (Osburn 950 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 1.3 g/hr | 1.8 g/hr |
| Efficiency (HHV) | 80 % | 74 % |
| Heat output (low) | 14206 BTU/h | 12100 BTU/h |
| Heat output (high) | 43190 BTU/h | 26500 BTU/h |
| Firebox volume | 3.07 cu ft | 1.55 cu ft |
| Carbon monoxide | 0.6 g/min | 1.2 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | No |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 239-19 | 289-21 |
| Covered model numbers | Model 91, Carolina 92 | 1.4 Series (Osburn 950, Escape 1200, Gateway 1400, Solution 1.4, Spark II, Fox, Déco Nano, S250, Harmony 1.4, HES140, Blue Ridge 100) |
Frequently asked questions
Which burns cleaner, the New Buck Corporation (Buck Stove Corp.) Model 91 or the Stove Builder International 1.4 Series (Osburn 950?
The New Buck Corporation (Buck Stove Corp.) Model 91: 1.3 g/hr certified particulate emissions versus 1.8 g/hr for the Stove Builder International 1.4 Series (Osburn 950.
Are the New Buck Corporation (Buck Stove Corp.) Model 91 and Stove Builder International 1.4 Series (Osburn 950 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.