Stove Builder International 1.4R Series: Osburn 950 N vs Stove Builder International SR-3.2 Series: St-Louis
The Stove Builder International 1.4R Series: Osburn 950 N is the cleaner burner: 1.7 g/hr certified particulate emissions versus 1.8 g/hr. The Stove Builder International SR-3.2 Series: St-Louis is the more efficient unit: 76% versus 74% HHV — more heat from every cord. The Stove Builder International SR-3.2 Series: St-Louis produces more peak heat (83,857 vs 71,279 BTU/h), suiting roughly 2,400–3,350 sq ft. The Stove Builder International SR-3.2 Series: St-Louis has the larger firebox (3.15 vs 1.67 cu ft), which generally means longer burns between reloads.
| Stove Builder International 1.4R Series: Osburn 950 N | Stove Builder International SR-3.2 Series: St-Louis | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Non-Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Cord Wood | Crib Wood |
| Emission rate | 1.7 g/hr | 1.8 g/hr |
| Efficiency (HHV) | 74 % | 76 % |
| Heat output (low) | 18785 BTU/h | 29605 BTU/h |
| Heat output (high) | 71279 BTU/h | 83857 BTU/h |
| Firebox volume | 1.67 cu ft | 3.15 cu ft |
| Carbon monoxide | 1.3 g/min | 1.4 g/min |
| 25C tax credit eligible (≥75% HHV) | No | Yes |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 412-26 | 398-25 |
| Test method | — | Alternate Test Method Used |
| Covered model numbers | 1.4R Series: Osburn 950 N, Escape 1200 N, Gateway 1400 N, Solution 1.4 N, Spark II N, Fox N, Deco Nano N, S250 N, HES140 N, Blue Ridge 100 N, SP1400 N, SL1400 N | SR-3.2 Series: St-Louis, Helia, Elevate, Chambly, HEA200 |
Frequently asked questions
Which burns cleaner, the Stove Builder International 1.4R Series: Osburn 950 N or the Stove Builder International SR-3.2 Series: St-Louis?
The Stove Builder International 1.4R Series: Osburn 950 N: 1.7 g/hr certified particulate emissions versus 1.8 g/hr for the Stove Builder International SR-3.2 Series: St-Louis.
Are the Stove Builder International 1.4R Series: Osburn 950 N and Stove Builder International SR-3.2 Series: St-Louis 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.