Phase 2-200
Previously certified
EPA lists Phase 2-200 under Marway Welding as a previously certified hydronic heater.
The listed emission rate is 0.26 pounds per million BTU.
The listed HHV efficiency is 39 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 | 0.26 pounds per million BTU |
| HHV efficiency | 39 percent |
| Heat output | 139,576 BTU/hr maximum |
| Heat output maximum | 139,576 BTU/hr |
| Firebox | Not listed |
| CO | Not listed |
| Certified fuel | Cord Wood |
| Test method | Not listed |
| 2020 NSPS | No |
| Thermal storage | No |
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.
- Phase 2-200
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
- 400-4S — 0.28 pounds per million BTU
- Crown Royal RS7400E — 0.24 pounds per million BTU
- Crown Royal RS7300E — 0.29 pounds per million BTU
- G Series G400G400s — 0.23 pounds per million BTU
- KB-125 — 0.3 pounds per million BTU
HHV efficiency
- Klear Sky 400 — 47 percent
- Wood Gun E155 — 53 percent
- AHB-170P — 54 percent
- Crown Royal RS7300E — 54 percent
- Mahoning Skye Series V — 54 percent
Heat output
- P7000 — 20,162–255,301 BTU/hr
- P7000 — 20,162–255,301 BTU/hr
- RHK AK 30 — 142,000 BTU/hr maximum
- Smart 40 — 142,600 BTU/hr maximum
- ECO-HK 70 Multifuel — 35,228–250,794 BTU/hr