MF Fire Nova 2C vs Stove Builder International 1.4 Series (Osburn 950
The MF Fire Nova 2C is the cleaner burner: 1.4 g/hr certified particulate emissions versus 1.8 g/hr. The MF Fire Nova 2C is the more efficient unit: 78% versus 74% HHV — more heat from every cord. The Stove Builder International 1.4 Series (Osburn 950 produces more peak heat (26,500 vs 21,009 BTU/h), suiting roughly 750–1,050 sq ft. The MF Fire Nova 2C has the larger firebox (2.33 vs 1.55 cu ft), which generally means longer burns between reloads. Combustion technology differs: the MF Fire Nova 2C 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.
| MF Fire Nova 2C | Stove Builder International 1.4 Series (Osburn 950 | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Cord Wood | Cord Wood |
| Emission rate | 1.4 g/hr | 1.8 g/hr |
| Efficiency (HHV) | 78 % | 74 % |
| Heat output (low) | 19012 BTU/h | 12100 BTU/h |
| Heat output (high) | 21009 BTU/h | 26500 BTU/h |
| Firebox volume | 2.33 cu ft | 1.55 cu ft |
| Carbon monoxide | 0.515 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 | 401-25 | 289-21 |
| Covered model numbers | Nova 2C, Nova 2C Tower | 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 MF Fire Nova 2C or the Stove Builder International 1.4 Series (Osburn 950?
The MF Fire Nova 2C: 1.4 g/hr certified particulate emissions versus 1.8 g/hr for the Stove Builder International 1.4 Series (Osburn 950.
Are the MF Fire Nova 2C 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.