New Buck Corporation (Buck Stove Corp.) 21NC vs New Buck Corporation (Buck Stove Corp.) Model 91
The New Buck Corporation (Buck Stove Corp.) Model 91 is the cleaner burner: 1.3 g/hr certified particulate emissions versus 1.7 g/hr. The New Buck Corporation (Buck Stove Corp.) Model 91 is the more efficient unit: 80% versus 70% HHV — more heat from every cord. The New Buck Corporation (Buck Stove Corp.) Model 91 produces more peak heat (43,190 vs 28,901 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 1.4 cu ft), which generally means longer burns between reloads. Combustion technology differs: the New Buck Corporation (Buck Stove Corp.) 21NC is a non-catalytic stove and the New Buck Corporation (Buck Stove Corp.) Model 91 a catalytic stove — see the catalytic vs non-catalytic guide for what that means day to day.
| New Buck Corporation (Buck Stove Corp.) 21NC | New Buck Corporation (Buck Stove Corp.) Model 91 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Non-Catalytic Stove | Catalytic Stove |
| Certified fuel | Crib Wood | Crib Wood |
| Emission rate | 1.7 g/hr | 1.3 g/hr |
| Efficiency (HHV) | 70 % | 80 % |
| Heat output (low) | 11079 BTU/h | 14206 BTU/h |
| Heat output (high) | 28901 BTU/h | 43190 BTU/h |
| Firebox volume | 1.4 cu ft | 3.07 cu ft |
| Carbon monoxide | 6.1 g/min | 0.6 g/min |
| 25C tax credit eligible (≥75% HHV) | No | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 66-16 | 239-19 |
| Covered model numbers | 21NC | Model 91, Carolina 92 |
Frequently asked questions
Which burns cleaner, the New Buck Corporation (Buck Stove Corp.) 21NC or the New Buck Corporation (Buck Stove Corp.) Model 91?
The New Buck Corporation (Buck Stove Corp.) Model 91: 1.3 g/hr certified particulate emissions versus 1.7 g/hr for the New Buck Corporation (Buck Stove Corp.) 21NC.
Are the New Buck Corporation (Buck Stove Corp.) 21NC and New Buck Corporation (Buck Stove Corp.) Model 91 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.