Wood gasifier 25 kW ATTACK SLX 25 Lambda

2025-04-16T12:24:14+02:00

Vendor: Attack
Type: Wood gasification boiler
Price: 5365.00

The ATTACK SLX 25 LAMBDA This is a modern wood gasification boiler with a nominal output of 25 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 with higher heating requirements. The automatic air control ensures consistently high efficiency and ease of use.

Highlights/Advantages

⭐ 25 kW nominal power – ideal for larger detached houses
⭐ Integrated lambda sensor – automatic combustion optimization
⭐ Efficiency up to 90.2% – efficient fuel utilization
⭐ Certified according to EN 303-5:2012 – tested emission values
⭐ Turbulators with cleaning lever – maintenance-friendly design

ATTACK SLX 25 LAMBDA wood gasifier 25 kW

Area of ​​application & Target audience

The ATTACK SLX 25 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 with higher heating requirements

Two-family houses

Renovation projects

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 content in the exhaust gas and automatically adjusts the primary and secondary air. This ensures:

optimal combustion quality

reduced fuel consumption

stable heat output

low emissions

Even with varying wood quality, combustion remains consistently efficient.

Technology & equipment

Boiler type: Wood gasification hot water boiler

Power: 25 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 25 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: 26.7 kW

Part load (30%/50%): 11.8 kW

Efficiency at rated power: 82.0%

Efficiency at 30%/50%: 83.2%

Lambda technology supports clean and stable combustion.

compatibility & System integration

For efficient and standards-compliant operation, the SLX 25 LAMBDA is typically 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

feature | Value
Manufacturer | ATTACK s.r.o.
Model | SLX 25 LAMBDA
Product type | Wood gasification hot water boiler
fuel | Firewood ≤ 25% moisture content
Nominal heat output | 26.7 kW
Part load power | 11.8 kW
Efficiency Rated Power | 82.0%
Efficiency at partial load | 83.2%
Maximum operating pressure. | 2.5 bar
Minimum chimney diameter | 150 mm
Recommended chimney draft | 23 Pa
standard | EN 303-5:2012

Scope of delivery

ATTACK SLX 25 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 the lambda control do?
It measures the oxygen content in the exhaust gas and automatically adjusts the air supply.

2. What is the power output of the SLX 25 LAMBDA?
The nominal heat output is 26.7 kW.

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

4. Is a buffer storage tank required?
A buffer storage tank is recommended for efficient operation.

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

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

Conclusion

The ATTACK SLX 25 LAMBDA 25 kW Combines high-performance wood gasification technology with modern lambda control. An efficient and convenient solution for sustainable heating with logs in residential buildings with higher heating demands. Order now and benefit from precise combustion control.