RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600
RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 is a non-catalytic wood stove from RSF / Industrial Chimney Company, Incorporated certified at 1.5 g/hr particulate emissions with 74% HHV efficiency and a 13,138–44,135 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 | RSF 3600 Series: Pearl 3600, Perle 3600, Focus 3600, Focus 3600i, Focus 3600s |
| Emission rate | 1.5 g/hr |
|---|---|
| Carbon monoxide | 1.29 g/min |
| Efficiency (HHV) | 74 % |
|---|
| Heat output (low) | 13138 BTU/h |
|---|---|
| Heat output (high) | 44135 BTU/h |
| Firebox volume | 1.57 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | No |
| EPA certification number | 256-20 |
What space does the RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 suit?
- Its 44,135 BTU/h peak output covers roughly 1,250–1,750 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 1.57 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 2.1 cords per season at the midpoint of its output range (8 burn-hours/day, 150-day season, 22 MMBtu/cord — see methodology).
- Certified burning Cord Wood — the test fuel closest to real-world firewood.
Similar wood stoves
- GHP Group Medium Wood Stove Series: MWS-2200L (1.8 g/hr)
- Stove Builder International 2.3 Series (Archway 2300 (2.3 g/hr)
- Foyers Supreme Fusion 24 24FN (1.5 g/hr)
- Morso Jernstoberi A/S 5660 B (1.2 g/hr)
- Woodstock Soapstone Company 210a Ideal Steel Hybrid (0.89 g/hr)
- New Buck Corporation (Buck Stove Corp.) Model 91 (1.3 g/hr)
Frequently asked questions
Is the RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 EPA certified?
The RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 holds EPA certification number 256-20 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 RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600's emission rate?
The RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 is certified at 1.5 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 RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 heat?
Roughly 1,250–1,750 sq ft, estimated from its 44,135 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 RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600 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 RSF / Industrial Chimney Company, Incorporated RSF 3600 Series: Pearl 3600'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)