RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B
RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B is a non-catalytic wood stove from RSF / Industrial Chimney Company, Incorporated certified at 1.7 g/hr particulate emissions with 70% HHV efficiency and a 11,757–25,406 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | RSF 3600B Series: Pearl 3600B, Perle 3600B, Focus 3600B, Focus 3600Bi |
| Emission rate | 1.7 g/hr |
|---|---|
| Carbon monoxide | 1.3 g/min |
| Efficiency (HHV) | 70 % |
|---|
| Heat output (low) | 11757 BTU/h |
|---|---|
| Heat output (high) | 25406 BTU/h |
| Firebox volume | 1.6 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 399-25 |
What space does the RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B suit?
- Its 25,406 BTU/h peak output covers roughly 750–1,000 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 1.6 cu ft firebox puts it in the mid-size home class.
- Rough fuel use: about 1.4 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 .
Similar wood stoves
- Foyers Supreme 38SFC_D_II and 38ST_D_II Series: Elegance ST 42 II (1.4 g/hr)
- Hearth and Home Technologies Vermont Castings Defiant 1975-CAT-C (1.3 g/hr)
- Morso Jernstoberi A/S 2B Standard 2020 (0.55 g/hr)
- Hearth and Home Technologies Vermont Castings Aspen C3 (2) (1.8 g/hr)
- MF Fire NOVA (1.9 g/hr)
- Spartherm M 700 Series: Spartherm M 700 Insert (1.7 g/hr)
Frequently asked questions
Is the RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B EPA certified?
Yes, the RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B is on the EPA's current list of certified wood heaters (certification number 399-25) and meets the 2020 NSPS Step 2 emission limits.
What is the RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B's emission rate?
The RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B is certified at 1.7 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 RSF / Industrial Chimney Company, Incorporated RSF 3600B Series: Pearl 3600B heat?
Roughly 750–1,000 sq ft, estimated from its 25,406 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 3600B Series: Pearl 3600B 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 3600B Series: Pearl 3600B's certified efficiency is 70% 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)