Hearth and Home Technologies Quadra-Fire 43M-ACC-C vs Stove Builder International 1.4R Series: Osburn 950 N
The Hearth and Home Technologies Quadra-Fire 43M-ACC-C is the cleaner burner: 1.6 g/hr certified particulate emissions versus 1.7 g/hr. They tie on efficiency at 74% HHV. The Stove Builder International 1.4R Series: Osburn 950 N produces more peak heat (71,279 vs 36,757 BTU/h), suiting roughly 2,050–2,850 sq ft. The Hearth and Home Technologies Quadra-Fire 43M-ACC-C has the larger firebox (2.26 vs 1.67 cu ft), which generally means longer burns between reloads.
| Hearth and Home Technologies Quadra-Fire 43M-ACC-C | Stove Builder International 1.4R Series: Osburn 950 N | |
|---|---|---|
| Appliance type | wood-stove | wood-stove |
| Combustion technology | Non-Catalytic Stove | Non-Catalytic Stove |
| Certified fuel | Crib Wood | Cord Wood |
| Emission rate | 1.6 g/hr | 1.7 g/hr |
| Efficiency (HHV) | 74 % | 74 % |
| Heat output (low) | 13239 BTU/h | 18785 BTU/h |
| Heat output (high) | 36757 BTU/h | 71279 BTU/h |
| Firebox volume | 2.26 cu ft | 1.67 cu ft |
| Carbon monoxide | 1.9 g/min | 1.3 g/min |
| 25C tax credit eligible (≥75% HHV) | No | No |
| 2020 NSPS compliant | Yes | Yes |
| Currently in production | Yes | Yes |
| EPA certification number | 247-20 | 412-26 |
| Covered model numbers | Quadra-Fire 43M-ACC-C, 43ST-ACC-C, Discovery-III-C, FF-WP-300 | 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 |
Frequently asked questions
Which burns cleaner, the Hearth and Home Technologies Quadra-Fire 43M-ACC-C or the Stove Builder International 1.4R Series: Osburn 950 N?
The Hearth and Home Technologies Quadra-Fire 43M-ACC-C: 1.6 g/hr certified particulate emissions versus 1.7 g/hr for the Stove Builder International 1.4R Series: Osburn 950 N.
Are the Hearth and Home Technologies Quadra-Fire 43M-ACC-C and Stove Builder International 1.4R Series: Osburn 950 N 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.