ATTACK SLXATTACK SLXATTACK SLXInstallation example with ATTACK SLX Preview of the comprehensive solution ATTACK


  • EfficientModern and innovative boiler design of ecological boilery
  • High efficient tubular exchanger “flue gas-water” with turbulators
  • Boiler efficiency of 90,3 %
  • Wide output range of 25–50 kW
  • 4 modifications – STANDARD, PROFI, LAMBDA Touch and COMBI Pellet
  • High combustion efficiency ensured by the tubular heat exchanger with movable turbulators
  • Long time approved construction, thousands of the satisfied customers
  • Heat exchanger cleaning by turbulators, by moving the lever, clean exchanger = high efficiency = lower operating costs, fuel saving
  • The volume of the boiler´s feeding chamber is unique: 200–230 l and ensures longer burning on one fuel load
  • Option of the dry coat placed around the whole feeding chamber – increased protection against tar creation
  • Burns soft and hard wood and wood briquettes
  • Possibility to load big wood logs – length of the feeding chamber is 580 mm (by 25 kW and higher outputs) and enables to load the wood logs of half-meter, which saves time by chopping the wood
  • Minimum of ash
  • Better burning and lower fuel consumption
  • Excellent emissions and efficiency
  • Fixed position of the lever for easier cleaning
  • User comfort, reliability of operation, easy use and maintenance
  • Manufactured from the special boiler steel of 6 mm to ensure long life-time
  • Suction fan for balanced and effective burning and dustless operation
  • Fluently modulated fan rotations (modification PROFI, LAMBDA Touch)
  • Option of the LAMBDA touch modification – the most advanced technology for the burning process regulation, which ensures the excellent values of emissions and efficiency
  • Right door version
  • Possibility to burn alternative fuel types like olive pits and pit crumb in the automatic burners with of 30 and 50 kW output – the COMBI Pellet modification
  • Automatic boiler stop after the fuel burns-out
  • Equipped with aftercooling circuit against overheating of boiler in the water
  • Refractory pieces are resistant up to the temperature of 1 350 °C, which ensure better parameters of burning
  • The boiler fulfils criteria of the highest class under the European norm EN303-5
LAMBDA TOUCHThe new boiler line ATTACK SLX - 7000 is equipped with the more efficient tubular exchanger flue gas – water. Special movable turbulators installed inside the exchanger serve to brake and to make the turbulent flow of the flue gas through the exchanger. Thereby it comes to higher heat transfer through the steel exchanger wall into the heating water.
Turbulators also enable easy exchanger cleaning. The clean exchanger reaches the most effective operation parameters – the high efficiency.

The volume of the SLX boiler´s feeding chamber is unique: 200 – 230l and ensures longer burning on fuel load. This unique chamber also makes possible to load big wood logs - length of the feeding chamber is 580 mm  (by 25 kW and higher outputs) and enables to load the wood logs of half-meter, which saves time by chopping the wood.

There is added possibility to burn alternative fuel types like olive pits and pit crumb in the automatic burners with of 30 and 50 kW output – the COMBI Pellet modification.

From technical view it is a boiler line with high efficiency, low flue gas temperature and more effective combustion process. Achieved efficiency of the ATTACK SLX boiler is upto 91,7 %. By installation of more efficient boiler of the ATTACK SLX line it comes to significant decrease of the operating costs, projected into the fuel savings, in comparison with less efficient boilers that combust same fuel. From the social-wide view, it is an enviroment-friendly source, combusting wooden biomass, which is a kind of CO2-neutral fuel.

Under the valid European norm EN303-5, classifying the solid fuel boilers by efficiency and emissions to individual classes, the ATTACK SLX boiler (version LAMBDA) reaches 25 times lower concentration of harmful CO emisions in the flue gas in comparison with the allowed level of this norm!


The wood gasifying boiler ATTACK SLX LAMBDA Touch for soft and hard wood burning disposes with the most advanced technology of control to achieve the excellent values of efficiency, low emissions and low wood consumption. The combustion process is very precisely regulated according to the measurement of the oxygen content in flue gas, primary and secondary air inlet into the boiler and controlled rotations of suction fan, to ensure the fluent modulation of the boiler output.

The electronics consists of the well-readable touch display for quick access to the necessary information and settings.
Software of electronics can be anytime upgraded by the USB key. The boiler can be connected to internet by the LAN cable and controlled from the distant point, even by the Smartphone. The boiler is designed with reference to the user comfort. Thereby is the heat exchanger cleaned automatically by motor and turbulators. The boiler electronics can be extended with additional external modules to control the heating mixing circuits, D.H.W. tank, solar panels or other automatic boiler ATTACK LAMBDA Touch.
Nominal output (STANDARD version) 50 kW
Output range (PROFI, LAMBDA version) 25–50 kW
Heat exchange surface 3,32 m²
Volume of feeding chmaber 230 dm³
Dimension of feeding door 235 x 445 mm
Prescribed chimney draught 23 Pa
Max. operating overpressure of water 250 kPa
Boiler weight 650 kg
Priemer odťahového hrdla 150 mm
Boiler height „A“ 1 472 mm
Boiler width „B“ 703 mm
Boiler depth „C“ 1 506 mm
Length of feeding chamber „D“ 790 mm
Diameter of flow connection G 2" "
Diameter of return connection G 2" "
El. input 78 W
Boiler efficiency 90,3 %
Boiler class
Flue gas temperature by nominal output 170 °C
Flue gas temperature by nominal output 0,031 kg/s
Max. noise level 65 dB
Fuel class and type Wood logs with relative humidity of 12 % – max. 20 %, ∅ 50–150 mm 
Average fuel consumption 13,0 kg/h
Approximate fuel consumption per season 1 kW = 1 m3 
Max. length of wood logs 750 mm
Volume of water in the boiler 136 l
Recommended volume of accumulation tank 3 500 l
Connection voltage ~230/50 V / Hz
Range for setting the temperature of heating water 65–85 °C
Range for setting the room temperature 10–27 °C
Capacity of the contacts of boiler regulator (PROFI version) 2 A/230 V 
Customer service
Customer service