G Series G100/G100s
Previously certified
EPA lists G Series G100/G100s under Steel Tech, Inc. as a previously certified hydronic heater.
The listed emission rate is 0.07 pounds per million BTU.
The listed HHV efficiency is 68 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 | 0.07 pounds per million BTU |
| HHV efficiency | 68 percent |
| Heat output | 125,000 BTU/hr maximum |
| Heat output maximum | 125,000 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.
- G Series G100/G100s
Other model lines from this manufacturer
- G Series G200-2/G200s Previously certified
- G Series G400G400s 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 560.1, CleanFire 500.1 — 0.07 pounds per million BTU
- Classic Edge 865, CleanFire 1800 — 0.07 pounds per million BTU
- ECO-HK 70 Multifuel — 0.07 pounds per million BTU
- G Series G200-2/G200s — 0.07 pounds per million BTU
- G-Class G2Plus — 0.07 pounds per million BTU
HHV efficiency
- 200 SSP — 69 percent
- E-Classic 3250 IR — 69 percent
- FHG 20/30 — 69 percent
- G2-G2 — 67 percent
- GX Series GX30 — 67 percent
Heat output
- P4 Pellet 60 — 31,808–212,443 BTU/hr
- NEO HV60 — 26,340–213,941 BTU/hr
- Komplett III LIGHT 35 KW — 120,000 BTU/hr maximum
- P4 Unit 38 — 130,000 BTU/hr maximum
- KB-125 — 119,457 BTU/hr maximum