The IBC GK-7K öko 30 is a modern wood gasification solid fuel boiler with a nominal heat output of 30 kW. With energy efficiency class A+, an efficiency of over 91%, and integrated lambda control, it offers an efficient and low-emission solution for heating single-family and multi-family homes.
Ideal for operators who rely on natural log wood as a sustainable fuel.
Highlights / Benefits
⭐ 30 kW nominal heat output – suitable for medium to larger residential buildings
⭐ Efficiency 91.44% (full load) – high energy utilization
⭐ Energy efficiency class A+ – EEI 119
⭐ Lambda sensor & induced draft fan – optimized, clean combustion
⭐ BAFA subsidy eligible – according to manufacturer's specification
IBC GK-7K öko 30 wood gasification boiler
Application area & target group
The GK-7K öko 30 is designed for heating heating water in closed central heating systems. It is suitable as a main boiler in standalone operation or in combination with oil, gas, or heat pump systems.
With 30 kW output, it reliably covers typical single-family homes as well as larger living areas.
According to BImSchV, a buffer tank with at least 55 liters per kW of heating output must be provided during installation (at least 1,650 liters for 30 kW).
Everyday benefits
The combination of primary and secondary fans and lambda sensor enables controlled, efficient wood gasification. The high efficiency of 91.44% ensures very good fuel utilization.
With a seasonal space heating energy efficiency of 81%, the device meets the requirements of the EU Ecodesign Regulation.
Technology & equipment
The GK-7K öko 30 consists of a cast iron sectional boiler body (6 sections) made of GJL-200 and is factory-tested for tightness.
Equipment includes:
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Boiler control with touch display
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Primary and secondary fans
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Lambda sensor
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Flue gas temperature sensor
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Safety heat exchanger (required in closed systems)
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Connection flow / return 1 ½"
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Flue pipe connection Ø 160 mm
The boiler is CE-marked and complies with, among others:
Efficiency & environment
The energy efficiency index (EEI) is 119, resulting in classification in energy efficiency class A+ .
Technical efficiency values:
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Efficiency (full load): 91.44%
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Seasonal space heating energy efficiency: 81%
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Flue gas temperature: 160–180 °C
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Sound emissions: < 70 dB(A)
Approved fuel is natural log wood according to EN ISO 17225-5 (class A1/A2) with 12–20% residual moisture.
Compatibility & system integration
The GK-7K öko 30 is designed for closed heating systems with a maximum operating pressure of 3 bar.
Required:
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Safety heat exchanger
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Thermal drain safety device
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Return temperature boost (min. 70–72 °C)
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Draft limiter in the flue pipe or chimney
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Buffer tank according to BImSchV
Electrical connection:
AC 230 V / 50 Hz
Maximum power consumption: 53 W
Technical data
| Feature |
Value |
| Manufacturer |
IBC Heiztechnik |
| Model |
GK-7K öko 30 |
| Product type |
Wood gasification boiler / solid fuel boiler |
| Nominal heat output |
30 kW |
| Energy efficiency class |
A+ |
| Energy efficiency index |
119 |
| Efficiency (full load) |
91.44% |
| Seasonal space heating energy efficiency |
81% |
| Number of sections |
6 |
| Weight |
700 kg |
| Dimensions (with cladding L x W x H) |
1,205 x 832 x 1,224 mm |
| Loading volume |
96 l |
| Combustion chamber length |
550 mm |
| Flow / Return |
1 ½" |
| Flue pipe connection |
160 mm |
| Max. operating pressure |
3 bar |
| Max. operating temperature |
100 °C |
| Electrical connection |
230 V / 50 Hz |
| Max. power consumption |
53 W |
| Item number |
1107-30-1000 |
Scope of delivery
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Wood gasifier GK-7K öko 30
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Boiler control
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Cleaning set (brush and poker)
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Installation instructions
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Operating instructions
Accessories / Recommendation
For proper operation, we recommend:
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Buffer tank ≥ 1,650 liters
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Return temperature control unit
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Thermal drain safety
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Boiler safety group
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Draft regulator
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Suitable flue pipe Ø 160 mm
Suitable system components can be found in the wood heating technology section on gemashop.de.
Installation & Safety Instructions
Installation only by a qualified specialist company in accordance with DIN EN 12828.
Before commissioning, the suitability of the chimney must be checked by the responsible chimney sweep.
The installation room must be equipped with a CO alarm device.
The return temperature must permanently be above 55 °C, recommended 70–72 °C via return temperature control.
FAQ
1. Is the GK-7K öko 30 eligible for funding?
According to the manufacturer, the model is eligible for BAFA funding. The currently applicable funding guidelines apply.
2. Which fuel is approved?
Naturally seasoned log wood according to EN ISO 17225-5 (A1/A2).
3. How high is the efficiency?
91.44% at full load.
4. What buffer tank size is required?
At least 55 liters per kW heating output, i.e. 1,650 liters at 30 kW.
5. Which chimney connection does the boiler require?
Flue pipe connection Ø 160 mm, negative pressure operation.
6. What electrical supply is required?
230 V / 50 Hz.
Conclusion
The IBC GK-7K öko 30 is a powerful wood gasifier with 30 kW, high efficiency and modern control technology. A robust, fundable solution for sustainable and economical wood heating.
