GX Series GX15
Previously certified
EPA lists GX Series GX15 under Hawken Energy as a previously certified hydronic heater.
The listed emission rate is 0.18 pounds per million BTU.
The listed HHV efficiency is 70 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 | 0.18 pounds per million BTU |
| HHV efficiency | 70 percent |
| Heat output | 176,116 BTU/hr maximum |
| Heat output maximum | 176,116 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 GX15
Other model lines from this manufacturer
- GX Series GX 10 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
- Classic Edge 350 — 0.18 pounds per million BTU
- Classic Edge 750 — 0.18 pounds per million BTU
- E-Classic 1450 — 0.18 pounds per million BTU
- E-Classic 3250 IR — 0.18 pounds per million BTU
- FHG 20/30 — 0.18 pounds per million BTU
HHV efficiency
- Classic Edge 550 — 70 percent
- Kedel RTB54 — 70 percent
- NEO HV60 — 70 percent
- 200 SSP — 69 percent
- BioWIN 262 — 71 percent
Heat output
- Crown Royal Stoves 7400E — 43,236–310,495 BTU/hr
- GARN WHS-1500H — 177,000 BTU/hr maximum
- GARN WHS-1500V — 177,000 BTU/hr maximum
- Classic Edge 350 — 177,802 BTU/hr maximum
- 200 SSP — 180,000 BTU/hr maximum