Morso Jernstoberi A/S 6100 B Series (6140 B
Morso Jernstoberi A/S 6100 B Series (6140 B is a non-catalytic wood stove from Morso Jernstoberi A/S certified at 1.8 g/hr particulate emissions with 74% HHV efficiency and a 11,892–19,067 BTU/h output range.
| Appliance type | wood-stove |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Crib Wood |
| Covered model numbers | 6100 B Series (6140 B, 6143 B, 6148 B, 6170 B) |
| Emission rate | 1.8 g/hr |
|---|---|
| Carbon monoxide | 0.79 g/min |
| Efficiency (HHV) | 74 % |
|---|
| Heat output (low) | 11892 BTU/h |
|---|---|
| Heat output (high) | 19067 BTU/h |
| Firebox volume | 0.522 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 228-19 |
What space does the Morso Jernstoberi A/S 6100 B Series (6140 B suit?
- Its 19,067 BTU/h peak output covers roughly 550–750 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 0.522 cu ft firebox puts it in the small/cabin class.
- Rough fuel use: about 1.1 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 .
Similar wood stoves
- Foyers Supreme Astra 18 (2 g/hr)
- Foyers Supreme Lumis 22 – Soapstone (1.3 g/hr)
- Hearth and Home Technologies Vermont Castings Intrepid FlexBurn 2115 (0.6 g/hr)
- Hearth and Home Technologies Quadra-Fire Pioneer III-ARC & Quadra-Fire – Pioneer III -REC Wood Heater Model Line (1.3 g/hr)
- Foyers Supreme Astra 18 (2) (1.2 g/hr)
- Rais A/S Q-Tee II USA Series: Q-Tee II USA (0.7 g/hr)
Frequently asked questions
Is the Morso Jernstoberi A/S 6100 B Series (6140 B EPA certified?
Yes, the Morso Jernstoberi A/S 6100 B Series (6140 B is on the EPA's current list of certified wood heaters (certification number 228-19) and meets the 2020 NSPS Step 2 emission limits.
What is the Morso Jernstoberi A/S 6100 B Series (6140 B's emission rate?
The Morso Jernstoberi A/S 6100 B Series (6140 B 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 Morso Jernstoberi A/S 6100 B Series (6140 B heat?
Roughly 550–750 sq ft, estimated from its 19,067 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 Morso Jernstoberi A/S 6100 B Series (6140 B 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 Morso Jernstoberi A/S 6100 B Series (6140 B'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)