Hawken Energy GX Series GX30
Hawken Energy GX Series GX30 is a non-catalytic hydronic heater from Hawken Energy certified at 4.9 g/hr particulate emissions with 67% HHV efficiency (previously certified, no longer in production).
Previously certified (out of production). This model appears in the EPA Certified Wood Heater Database but is no longer on the current certified list, which usually means it is no longer manufactured. The specifications below are its certified figures, kept for reference and for owners of installed units. Browse currently certified heaters for models sold new today.
| Appliance type | hydronic-heater |
|---|---|
| Combustion technology | Non-Catalytic Stove |
| Certified fuel | Cord Wood |
| Covered model numbers | GX Series GX30 |
| Emission rate | 4.9 g/hr |
|---|
| Efficiency (HHV) | 67 % |
|---|
| Heat output (high) | 242090 BTU/h |
|---|
| 25C tax credit eligible (≥75% HHV) | No |
|---|---|
| 2020 NSPS compliant | No |
| Currently in production | No |
What space does the Hawken Energy GX Series GX30 suit?
- Certified burning Cord Wood — the test fuel closest to real-world firewood.
Similar hydronic heaters
- Central Boiler Inc.- WoodMaster Classic Edge 750 (4.6 g/hr)
- Central Boiler Inc.- WoodMaster E-Classic 3250 IR (3.81 g/hr)
- Central Boiler Inc.- WoodMaster Classic Edge 865
- Central Boiler Inc.- WoodMaster Central Boiler Classic Edge 760 (3 g/hr)
- WoodMaster CleanFire 700 (Central Boiler Classic Edge 760) (3 g/hr)
- Nature's Comfort GT Series GT-6000 (5.7 g/hr)
Frequently asked questions
Is the Hawken Energy GX Series GX30 EPA certified?
The Hawken Energy GX Series GX30 holds EPA certification number n/a but is no longer on the current certified list — it is previously certified, which usually means the model is out of production. Already-installed units are unaffected by that status in most jurisdictions.
What is the Hawken Energy GX Series GX30's emission rate?
The Hawken Energy GX Series GX30 is certified at 4.9 grams of particulates per hour (tested with cord wood). Real-world emissions depend heavily on fuel moisture and operation — the lab figure assumes seasoned fuel and correct air settings.
Does the Hawken Energy GX Series GX30 qualify for a federal tax credit?
No — the federal 25C credit for biomass stoves was terminated for property placed in service after December 31, 2025. The Hawken Energy GX Series GX30's certified efficiency is 67% HHV, which did not meet the credit's ≥75% HHV threshold while it existed. State and local incentive programs may still apply — check your state energy office and air district.
Sources
- cfpub.epa.gov (retrieved 2026-07-23)