Stove Builder International SR-3.2 Series: St-Louis
Stove Builder International SR-3.2 Series: St-Louis is a non-catalytic wood stove from Stove Builder International certified at 1.8 g/hr particulate emissions with 76% HHV efficiency and a 29,605–83,857 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | SR-3.2 Series: St-Louis, Helia, Elevate, Chambly, HEA200 |
| Emission rate | 1.8 g/hr |
|---|---|
| Carbon monoxide | 1.4 g/min |
| Efficiency (HHV) | 76 % |
|---|
| Heat output (low) | 29605 BTU/h |
|---|---|
| Heat output (high) | 83857 BTU/h |
| Firebox volume | 3.15 cu ft |
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 398-25 |
| Test method | Alternate Test Method Used |
What space does the Stove Builder International SR-3.2 Series: St-Louis suit?
- Its 83,857 BTU/h peak output covers roughly 2,400–3,350 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 3.15 cu ft firebox puts it in the large-home, overnight-burn class.
- Rough fuel use: about 4.1 cords per season at the midpoint of its output range (8 burn-hours/day, 150-day season, 22 MMBtu/cord — see methodology).
- Certified burning Crib Wood .
Compare the Stove Builder International SR-3.2 Series: St-Louis
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Similar wood stoves
- Jotul North America (Jotul U.S.A., Inc.) F 55 V2 (1.3 g/hr)
- Innovative Hearth Products Montecito-C Series: Montecito-C (1.5 g/hr)
- Stove Builder International Everest III Series: Everest III (1.9 g/hr)
- Travis Industries 44 Elite (1.8 g/hr)
- Hearth and Home Technologies Quadra-Fire Pioneer - III (2 g/hr)
- Stove Builder International 1.4R Series: Osburn 950 N (1.7 g/hr)
Frequently asked questions
Is the Stove Builder International SR-3.2 Series: St-Louis EPA certified?
Yes, the Stove Builder International SR-3.2 Series: St-Louis is on the EPA's current list of certified wood heaters (certification number 398-25) and meets the 2020 NSPS Step 2 emission limits.
What is the Stove Builder International SR-3.2 Series: St-Louis's emission rate?
The Stove Builder International SR-3.2 Series: St-Louis is certified at 1.8 grams of particulates per hour (tested with crib 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 SR-3.2 Series: St-Louis heat?
Roughly 2,400–3,350 sq ft, estimated from its 83,857 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 SR-3.2 Series: St-Louis 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 SR-3.2 Series: St-Louis's certified efficiency is 76% HHV, which met 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)