GX Series GX 10
Previously certified
EPA lists GX Series GX 10 under Hawken Energy as a previously certified hydronic heater.
The listed emission rate is 0.14 pounds per million BTU.
The listed HHV efficiency is 64 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 | 0.14 pounds per million BTU |
| HHV efficiency | 64 percent |
| Heat output | 144,870 BTU/hr maximum |
| Heat output maximum | 144,870 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.
- GX Series GX 10
Other model lines from this manufacturer
- GX Series GX15 Previously certified
- GX Series GX30 Previously certified
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
- Central Boiler Classic Edge 560, WoodMaster– CleanFire 500 — 0.14 pounds per million BTU
- GARN WHS-1500H — 0.14 pounds per million BTU
- GARN WHS-1500V — 0.14 pounds per million BTU
- Crown Royal RS7200E — 0.13 pounds per million BTU
- EBW 200-170 — 0.16 pounds per million BTU
HHV efficiency
- BioWIN 152 — 65 percent
- BioWIN 152 — 65 percent
- GARN WHS-1500H — 65 percent
- GARN WHS-1500V — 65 percent
- Optimizer 350 — 65 percent
Heat output
- Classic Edge 760.1, CleanFire 700.1 — 36,488–256,550 BTU/hr
- ECO-HK 70 Multifuel — 35,228–250,794 BTU/hr
- Smart 40 — 142,600 BTU/hr maximum
- Wood Gun E155 — 147,632 BTU/hr maximum
- RHK AK 30 — 142,000 BTU/hr maximum