Stove Builder International 1.4R Series: Osburn 950 N
Stove Builder International 1.4R Series: Osburn 950 N is a non-catalytic wood stove from Stove Builder International certified at 1.7 g/hr particulate emissions with 74% HHV efficiency and a 18,785–71,279 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Cord Wood |
| 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 |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 1.3 g/min |
| Efficiency (HHV) | 74 % |
|---|
| Heat output (low) | 18785 BTU/h |
|---|---|
| Heat output (high) | 71279 BTU/h |
| Firebox volume | 1.67 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 412-26 |
What space does the Stove Builder International 1.4R Series: Osburn 950 N suit?
- Its 71,279 BTU/h peak output covers roughly 2,050–2,850 sq ft at the 25–35 BTU/h-per-square-foot rule of thumb — see the sizing calculator to adjust for your insulation and climate.
- The 1.67 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 3.3 cords per season at the midpoint of its output range (8 burn-hours/day, 150-day season, 22 MMBtu/cord — see methodology).
- Certified burning Cord Wood — the test fuel closest to real-world firewood.
Compare the Stove Builder International 1.4R Series: Osburn 950 N
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries 20.2 Series: Ashford 20.2 (AF20.2)
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries 25 Series: Sirocco 25 (SC25) Insert
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries 30.2 Series: Sirocco 30.2 (SC30.2)
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries King KE40 (3)
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries Princess PE32 (2)
- Stove Builder International 1.4R Series: Osburn 950 N vs Blaze King Industries Princess PI29 Insert (2)
- Stove Builder International 1.4R Series: Osburn 950 N vs FPI/Regency Fireplace Products Alterra Pro I3000 Series (I300R
- Stove Builder International 1.4R Series: Osburn 950 N vs FPI/Regency Fireplace Products CI2700-1
Similar wood stoves
- Sierra Products S8000II TEC (1.7 g/hr)
- Travis Industries Evergreen (1.5 g/hr)
- GHP Group Pleasant Hearth Large Wood Stove GWS-2200 (1.5 g/hr)
- Travis Industries Medium Flush Wood Hybrid Fyre Insert (1.7 g/hr)
- Hearth and Home Technologies Quadra-Fire Pioneer - III (2 g/hr)
- Travis Industries 36 Elite (1.3 g/hr)
Frequently asked questions
Is the Stove Builder International 1.4R Series: Osburn 950 N EPA certified?
Yes, the Stove Builder International 1.4R Series: Osburn 950 N is on the EPA's current list of certified wood heaters (certification number 412-26) and meets the 2020 NSPS Step 2 emission limits.
What is the Stove Builder International 1.4R Series: Osburn 950 N's emission rate?
The Stove Builder International 1.4R Series: Osburn 950 N is certified at 1.7 grams of particulates per hour (tested with cord wood). Real-world emissions depend heavily on fuel moisture and operation — the lab figure assumes seasoned fuel and correct air settings.
How many square feet can the Stove Builder International 1.4R Series: Osburn 950 N heat?
Roughly 2,050–2,850 sq ft, estimated from its 71,279 BTU/h peak output at 25–35 BTU/h per square foot. Insulation, climate, ceiling height, and floor plan move this figure substantially in both directions.
Does the Stove Builder International 1.4R Series: Osburn 950 N qualify for a federal tax credit?
No — the federal 25C credit for biomass stoves was terminated for property placed in service after December 31, 2025. The Stove Builder International 1.4R Series: Osburn 950 N's certified efficiency is 74% HHV, which did not meet the credit's ≥75% HHV threshold while it existed. State and local incentive programs may still apply — check your state energy office and air district.
Sources
- cfpub.epa.gov (retrieved 2026-07-23)