The ATTACK SLX 20 LAMBDA This is a modern wood gasification boiler with a nominal output of 20 kW and integrated lambda control for particularly precise and low-emission combustion of logs. It is ideally suited for single-family and two-family homes, both new builds and renovations. Thanks to automatic air control, it offers high user-friendliness and optimized fuel utilization.

Highlights/Advantages

⭐ 20 kW nominal power – ideal for single-family homes
⭐ Lambda sensor integrated – automatic and precise combustion control
⭐ Efficiency up to 90.2% – efficient energy use
⭐ Certified according to EN 303-5:2012 – tested emission values
⭐ Turbulators with cleaning lever – easy maintenance

ATTACK SLX 20 LAMBDA wood gasifier 20 kW

Area of ​​application & Target audience

The ATTACK SLX 20 LAMBDA is a Hot water boiler for solid fuels (wood) with automatic air control via lambda sensor. It is particularly suitable for:

• Single-family homes

• Two-family houses

• energy-efficient renovations

• Heating systems with buffer storage

Preferred fuels are Logs with a moisture content ≤ 25%.

Everyday benefits

The integrated lambda control continuously measures the residual oxygen in the exhaust gas and automatically adjusts the air supply. This results in:

• optimal combustion quality

• reduced fuel consumption

• stable power output

• low emissions

The automatic control ensures high comfort and consistent efficiency – even with varying wood quality.

Technology & equipment

• Boiler type: Wood gasification hot water boiler

• Power: 20 kW

• Lambda sensor for automatic air control

• Fan-assisted combustion

• Turbulators in the tube heat exchanger

• Thermal safety device required

• Maximum operating pressure: 2.5 bar

• Minimum chimney diameter: 150 mm (200 mm recommended)

• Recommended chimney draft: 23–30 Pa

To ensure a long service life, a return temperature above 65 °C must be maintained. Recommended boiler temperature: 80–85 °C.

Efficiency & Environment

The ATTACK SLX 20 LAMBDA meets the requirements of EN 303-5:2012 for boilers of fuel class A.

Measurement values ​​according to the information sheet:

• Nominal heat output: 19.7 kW

• Part load (30%/50%): 9.7 kW

• Efficiency at rated power: 81.9%

• Efficiency at 30%/50%: 82.4%

Lambda technology supports clean and efficient combustion.

compatibility & System integration

For standard-compliant and efficient operation, the SLX 20 LAMBDA is usually combined with:

• Buffer storage

• Return flow booster/mixing device

• Thermal safety device

• Safety valve

• Expansion vessel

Suitable Buffer storage tanks, return temperature boosts and safety groups You can find them in our product range at gemashop.de.

Technical data

Scope of delivery

• ATTACK SLX 20 LAMBDA wood gasifier

• User manual

• Assembly instructions

Assembly & Safety instructions

Installation and commissioning must only be carried out by a qualified specialist company.

Important instructions:

• Thermal safety device absolutely necessary

• Return temperature boost necessary to prevent condensation

• Compliance with chimney requirements

• Regular cleaning of ash box, turbulators and heat exchangers

The warranty may be limited if the installation is improper.

FAQ

1. What does lambda control mean?
The lambda sensor measures the oxygen content in the exhaust gas and automatically controls the air supply.

2. What is the power output of the SLX 20 LAMBDA?
The nominal heat output is 19.7 kW.

3. Which fuel is permitted?
Firewood with a maximum moisture content of 25%.

4. Is a buffer storage tank necessary?
A buffer storage tank is recommended for efficient and compliant operation.

5. What is the maximum operating pressure?
2.5 bar.

6. How often is cleaning required?
Empty the ash box daily, and clean the heat exchanger regularly according to the operating instructions.

Conclusion

The ATTACK SLX 20 LAMBDA 20 kW Combines proven wood gasification technology with modern lambda control. An efficient and convenient solution for sustainable heating with logs in single-family and two-family homes. Order now and benefit from automated combustion control.