Stove Builder International 3.3 Series Osburn 3300
Stove Builder International 3.3 Series Osburn 3300 is a non-catalytic wood stove from Stove Builder International certified at 0.95 g/hr particulate emissions with 71% HHV efficiency and a 15,841–57,041 BTU/h output range (previously certified, no longer in production).
Previously certified (out of production). This model appears in the EPA Certified Wood Heater Database but is no longer on the current certified list, which usually means it is no longer manufactured. The specifications below are its certified figures, kept for reference and for owners of installed units. Browse currently certified heaters for models sold new today.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Cord Wood |
| Covered model numbers | 3.3 Series Osburn 3300, Austral III, Myriad III, Legend III, Escape 1900, Black Stag II, Solution 3.3, Gateway 3300, FW3200 |
| Emission rate | 0.95 g/hr |
|---|---|
| Carbon monoxide | 1.02 g/min |
| Efficiency (HHV) | 71 % |
|---|
| Heat output (low) | 15841 BTU/h |
|---|---|
| Heat output (high) | 57041 BTU/h |
| Firebox volume | 2.67 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | No |
| EPA certification number | 241-19 |
What space does the Stove Builder International 3.3 Series Osburn 3300 suit?
- Its 57,041 BTU/h peak output covers roughly 1,650–2,300 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 2.67 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 2.8 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.
Similar wood stoves
- Woodstock Soapstone Company Fireview Soapstone Stove 205b (1.6 g/hr)
- Travis Industries Large Flush Wood Hybrid Fyre Insert (1.9 g/hr)
- Stove Builder International 3.5 Series (Solution 3.5 (1.6 g/hr)
- GHP Group Pleasant Hearth Small Wood Stove SWS-1200 (1.9 g/hr)
- Innovative Hearth Products Montecito-B (1.9 g/hr)
- Travis Industries Lopi Rockport Hybrid-Fyre (1.7 g/hr)
Frequently asked questions
Is the Stove Builder International 3.3 Series Osburn 3300 EPA certified?
The Stove Builder International 3.3 Series Osburn 3300 holds EPA certification number 241-19 but is no longer on the current certified list — it is previously certified, which usually means the model is out of production. Already-installed units are unaffected by that status in most jurisdictions.
What is the Stove Builder International 3.3 Series Osburn 3300's emission rate?
The Stove Builder International 3.3 Series Osburn 3300 is certified at 0.95 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 3.3 Series Osburn 3300 heat?
Roughly 1,650–2,300 sq ft, estimated from its 57,041 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 3.3 Series Osburn 3300 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 3.3 Series Osburn 3300's certified efficiency is 71% 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)