Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30
Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30 is a non-catalytic hydronic heater from Fröling Heizkessel und Behälterbau Ges.m.b.H with 77% HHV efficiency and a 12,997–99,594 BTU/h output range.
| Appliance type | hydronic-heater |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Cord Wood |
| Covered model numbers | S3 Turbo 30 |
| Efficiency (HHV) | 77 % |
|---|
| Heat output (low) | 12997 BTU/h |
|---|---|
| Heat output (high) | 99594 BTU/h |
| Firebox volume | 4.45 cu ft |
| Carbon monoxide | 2.5 g/min |
|---|
| 25C tax credit eligible (≥75% HHV) | Yes |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 51HH-23 |
What space does the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30 suit?
- The 4.45 cu ft firebox puts it in the large-home, overnight-burn class.
- Certified burning Cord Wood — the test fuel closest to real-world firewood.
Similar hydronic heaters
- Maine Energy Systems PES 25-32 (0.8 g/hr)
- HeatMaster Furnaces G Series G4000 (0 g/hr)
- Heatmaster Furnaces Inc. (SteelTech Inc.) G Series G4000
- Northwest Manufacturing Woodmaster Mini Boiler (1.4 g/hr)
- Northwest Manufacturing Woodmaster CleanFire 400 (1.04 g/hr)
- Northwest Manufacturing Woodmaster Ultra 30 (1.6 g/hr)
Frequently asked questions
Is the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30 EPA certified?
Yes, the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30 is on the EPA's current list of certified wood heaters (certification number 51HH-23) and meets the 2020 NSPS Step 2 emission limits.
Does the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30 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 Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 30's certified efficiency is 77% 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)