G3-G3
Previously certified
EPA lists G3-G3 under Polar Furnace Manufacturing Inc. as a previously certified hydronic heater.
The listed emission rate is 0.08 pounds per million BTU.
The listed HHV efficiency is 72 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 | 0.08 pounds per million BTU |
| HHV efficiency | 72 percent |
| Heat output | 200,000 BTU/hr maximum |
| Heat output maximum | 200,000 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.
- G3-G3
Other model lines from this manufacturer
- G-Class G2Plus Currently certified
- G Class G3 Previously certified
- G2-G2 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
- BIO200 — 0.08 pounds per million BTU
- Crown Royal Stoves 7200E — 0.08 pounds per million BTU
- Crown Royal Stoves 7300E — 0.08 pounds per million BTU
- Kedel RTB 170 — 0.08 pounds per million BTU
- Kedel RTB54 — 0.08 pounds per million BTU
HHV efficiency
- Classic Edge 750 — 72 percent
- Woodpecker — 72 percent
- BioWIN 262 — 71 percent
- BioWIN 262 — 71 percent
- BioWIN 332 — 71 percent
Heat output
- G2-G2 — 200,000 BTU/hr maximum
- GARN WHS-2000H — 200,000 BTU/hr maximum
- GARN WHS-2000V — 200,000 BTU/hr maximum
- P4 Unit 60 — 200,000 BTU/hr maximum
- PE/PES 36-56 — 199,408 BTU/hr maximum
Polar Furnace Manufacturing Inc. hub · EPA Certified Wood Heater Database