New Buck Corporation (Buck Stove Corp.) Model 91 vs Woodstock Soapstone Company Progress Hybrid 209b
The Woodstock Soapstone Company Progress Hybrid 209b is the cleaner burner: 0.46 g/hr certified particulate emissions versus 1.3 g/hr. They tie on efficiency at 80% HHV. The New Buck Corporation (Buck Stove Corp.) Model 91 produces more peak heat (43,190 vs 35,222 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 2.8 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 Woodstock Soapstone Company Progress Hybrid 209b a hybrid — see the catalytic vs non-catalytic guide for what that means day to day.
| New Buck Corporation (Buck Stove Corp.) Model 91 | Woodstock Soapstone Company Progress Hybrid 209b | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Hybrid |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.3 g/hr | 0.46 g/hr |
| Efficiency (HHV) | 80 % | 80 % |
| Heat output (low) | 14206 BTU/h | 15257 BTU/h |
| Heat output (high) | 43190 BTU/h | 35222 BTU/h |
| Firebox volume | 3.07 cu ft | 2.8 cu ft |
| Carbon monoxide | 0.6 g/min | 0.07 g/min |
| 25C tax credit eligible (≥75% HHV) | Yes | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 239-19 | 406-25 |
| Covered model numbers | Model 91, Carolina 92 | Progress Hybrid 209b |
Frequently asked questions
Which burns cleaner, the New Buck Corporation (Buck Stove Corp.) Model 91 or the Woodstock Soapstone Company Progress Hybrid 209b?
The Woodstock Soapstone Company Progress Hybrid 209b: 0.46 g/hr certified particulate emissions versus 1.3 g/hr for the New Buck Corporation (Buck Stove Corp.) Model 91.
Are the New Buck Corporation (Buck Stove Corp.) Model 91 and Woodstock Soapstone Company Progress Hybrid 209b 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.