P4 Unit 25
Previously certified
EPA lists P4 Unit 25 under Tarm USA, Inc./ Fröling Heizkessel- und Behälterbau Ges.m.b.H as a previously certified hydronic heater.
The listed emission rate is 0.03 pounds per million BTU.
The listed HHV efficiency is 87 percent.
Source: EPA Certified Wood Heater Database, snapshot 2026-10-23.
EPA rows
| Field | Row 1 |
|---|---|
| Status | Previously certified |
| Type | Hydronic Heater |
| Subtype | Non-Catalytic Stove |
| Emission | 0.03 pounds per million BTU |
| HHV efficiency | 87 percent |
| Heat output | 85,300 BTU/hr maximum |
| Heat output maximum | 85,300 BTU/hr |
| Firebox | Not applicable |
| CO | Not listed |
| Certified fuel | Wood Pellets |
| Test method | Not listed |
| 2020 NSPS | No |
| Thermal storage | Yes |
Retail names in the model line
These are the names split from EPA's model cell. They are aliases for this line, not separate listings.
- P4 Unit 25
Other model lines from this manufacturer
No other model line in this snapshot uses this manufacturer string.
Nearest model lines by EPA figures
Nearest means the smallest absolute difference on that EPA figure, among other Hydronic Heater model lines that list it. Ties are ordered by model name.
Emission
- CP 1000 — 0.03 pounds per million BTU
- CP 500 — 0.03 pounds per million BTU
- Maxim M255 PE — 0.03 pounds per million BTU
- P4 Unit 100 — 0.03 pounds per million BTU
- P4 Unit 15 — 0.03 pounds per million BTU
HHV efficiency
- BioWin 100 — 87 percent
- BioWin 152 — 87 percent
- BioWin 262 — 87 percent
- CP 1000 — 87 percent
- ECO-HK 70 Multifuel — 87 percent
Heat output
- Komplett III LIGHT 25 KW — 85,000 BTU/hr maximum
- RTB102(TS) — 86,000 BTU/hr maximum
- Central Boiler Classic Edge 360, WoodMaster– CleanFire 300 — 20,293–148,625 BTU/hr
- CleanFire 300 (Central Boiler Classic Edge 360) — 20,293–148,625 BTU/hr
- Kedel RTB102 — 87,379 BTU/hr maximum
Tarm USA, Inc./ Fröling Heizkessel- und Behälterbau Ges.m.b.H hub · EPA Certified Wood Heater Database