Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50
Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50 is a non-catalytic hydronic heater from Fröling Heizkessel und Behälterbau Ges.m.b.H with 73% HHV efficiency and a 24,929–83,097 BTU/h output range.
| Appliance type | hydronic-heater |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Cord Wood |
| Covered model numbers | S3 Turbo 50 |
| Efficiency (HHV) | 73 % |
|---|
| Heat output (low) | 24929 BTU/h |
|---|---|
| Heat output (high) | 83097 BTU/h |
| Firebox volume | 6.78 cu ft |
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | Yes |
| Currently in production | Yes |
| EPA certification number | 9HH-16 |
What space does the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50 suit?
- The 6.78 cu ft firebox puts it in the large-home, overnight-burn class.
- Certified burning Cord Wood — the test fuel closest to real-world firewood.
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Frequently asked questions
Is the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50 EPA certified?
Yes, the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50 is on the EPA's current list of certified wood heaters (certification number 9HH-16) and meets the 2020 NSPS Step 2 emission limits.
Does the Fröling Heizkessel und Behälterbau Ges.m.b.H S3 Turbo 50 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 50's certified efficiency is 73% 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)