92 %
Efficiency
Long burning
time
Quality
material
Simple fuel
change
ATTACK SLX COMBI Pellet is an ecological combined boiler of the 5th emission class, which offers high-quality construction. High combustion efficiency of up to 92% saves significant heating costs. The choice of fuel provides an economic advantage and high comfort. Changing fuel is simple and anyone can handle it. The boiler uses the design, construction, and all features of the SLX boiler with PROFI control. It is equipped with a fully automatic Pellet Burner Automatic for convenient and fully automatic pellet combustion and burner cleaning.
Suitable for every type of house
A wood gasifying boiler with strong power and high efficiency is suitable for every type of house. Take advantage of the opportunity to get a new boiler with the Green Households program.
Boiler connection to the chimney
Correct connection of the boiler to the chimney is very important. Every house has a different height and area. When choosing the right type of boiler for your house, the power to the chimney and the heating system is important. We always recommend consulting this topic with a service technician, chimney sweep, or designer.
Extra-large loading chamber
ATTACK SLX COMBI Pellet is also like ATTACK SLX equipped with an extra-large loading chamber for power ranges 25 – 35 kW (200 liters) with a length of (650 mm). Thanks to the large chamber, you save time on wood preparation.
Practical advice for the boiler
Boiler care
Find out everything necessary about wood boilers. How to quickly and effectively ignite the boiler. Why tar can form and how to correctly clean the boiler.
High efficiency and ecological combustion
We manufacture boilers so that they have the least impact on the environment, which we consider essential for life. Wood gasifying technology is, compared to combustion in a conventional boiler, highly ecological, efficient, and significantly less burdensome for the environment. Gasification takes place via precisely controlled technology. This improves the overall efficiency of wood combustion, and its values reach up to 92%. Higher efficiency is reflected mainly in costs, as you consume less fuel.
Pellet burner
ATTACK Pellet Burner Automatic offers comfort not only in fuel combustion but also in control. Pellets are automatically drawn from the fuel feeder and fall into the burner on the grate, where they ignite with electric ignition, and the combustion itself begins. You can easily set the burner power according to your requirements in the range of 8 – 30 kW, always 2 kW lower or higher. You can increase comfort in controlling the burner if you use a room thermostat to control its operation.
- Suitable for everyday heating
- PID regulator – more precise and continuous control of fan speed and Fuzzy Logic control sensors
- Controls 2 pumps (heating circuit pump + accumulation tank or DHW charging pump)
- For solutions with an accumulation tank – built-in tank charging logic and discharge protection
- Simple operation and display with current operating information (boiler temperature, flue gas temperature, temperature in the accumulation tank)
- Parameter monitoring (fan operation, DHW/accumulation tank charging pump operation, circulation pump operation)
- Automatic boiler shutdown after fuel burnout
Technical information on important parts of a combined boiler that might interest you.
Control panel
The boiler has a control unit PROFI:
Electronics with simple operation. With this electronics, the air supply control and exchanger cleaning are manual. More about PROFI electronics PROFI
Turbulators
The boiler is equipped with a high-efficiency tube heat exchanger with turbulators which contribute to the high efficiency of the boiler and reaches a value of up to 92%.
Refractory concrete fitting
Long boiler life: Reliable operation is also ensured by a high-quality refractory concrete nozzle that can withstand temperatures up to 1350 ° C.
Loading chamber door
Wood with a length of up to (650 mm) can be loaded into the boiler through the loading door. The boiler has an oversized loading chamber with a volume (200 liters). The advantage of the above-standard loading space is the division of wood at the meter which you only need to divide once.
Turbulator lever
The turbulator cleaning lever is used to clean the dirt deposited between the turbulators.
Cleaning hole
The side opening of the boiler is used to clean the ash from the turbulators. The cleaning intensity depends on the heating intensity in the boiler.
Fan
It is used to maintain the boiler output.
After-cooling circuit
It is used to cool down the exchanger when the boiler emergency temperature is reached.
Dry coat
The boiler is also equipped with tar protection which is taken care of by a dry coat located around the perimeter of the entire loading chamber.
Combustion chamber door
The lower door is mainly used to clean the ash from the boiler. With the PROFI version, it is also possible to set the air supply manually.
Special doors for changing fuel
Special doors for changing fuel in case you decide to heat only with wood.
Automatic burner
Pellet burner ATTACK Pellet Burner Automatic offers comfort not only when burning fuel but also setting and control. Pellets are automatically drawn from the fuel feeder which fall into the burner on the grate where they ignite with electric ignition and the combustion itself begins.
Movable pantograph
There is a burner on the pantograph which thanks to the pantograph can be easily removed and inserted into the boiler.
Technical data and documents for download
The wood gasifying boiler ATTACK SLX COMBI Pellet offers high efficiency up to 92%, simple fuel change, automatic pellet combustion, automatic burner cleaning, large loading chamber, long burning, high-quality processing, and long life. Find out more about other technical data.
- Simple fuel change – wood/pellets
- Fully automatic combustion process
- Automatic burner cleaning
- High combustion efficiency 92%
- Wide power range 20, 25, 30, 35 kW
- Dry coat – protection against tar
- Long burning 8 to 12 hours
- Large loading chamber up to 200l / 650 mm
- Refractory concrete pieces withstanding temperatures up to 1350 °C
| Parameter | Unit | 20SLXCP | 25SLXCP | 30SLXCP | 35SLXCP | ||||
| Nominal output | WOOD | kW | 20 | 25 | 30 | 35 | |||
| PELLETS | 30 | 30 | 30 | 40 | |||||
| Output range | WOOD | kW | 10 – 20 | 12,5 – 25 | 15 – 30 | 17,5 – 35 | |||
| PELLETS | 8 – 30 | 8 – 30 | 8 – 30 | 8 – 30 | |||||
| Heat exchange area | m² | 2,95 | |||||||
| Volume of water in the boiler | l | 200 | |||||||
| Dimension of feeding door | mm | 235×445 | |||||||
| Prescribed chimney draught | Pa | 23 | |||||||
| Max. operating overpressure of water | kPa | 250 | |||||||
| Pressure loss on the water side (ΔT 10 K) | kPa | 1,9 | 2,1 | 2,4 | 2,7 | ||||
| Pressure loss on the water side (ΔT 20 K) | kPa | 0,8 | 0,9 | 1,2 | 1,6 | ||||
| Boiler weight | kg | 610 | |||||||
| Diameter of flue gas connection | mm | 150 | |||||||
| Boiler height „A“ | mm | 1472 | |||||||
| Boiler „B“ | mm | 703 | |||||||
| Boiler depth „C“ – with burner | mm | 1650 | |||||||
| Boiler depth with upper door cover | mm | 1350 | |||||||
| Length of feeding chamber „D“ | mm | 985 | |||||||
| Height of fan – “E” | mm | 751 | |||||||
| Depth of chamber | mm | 690 | |||||||
| Grade of protection | IP | 20 | |||||||
| Electric power | WOOD | W | 42 | ||||||
| PELETY – at ignition | 600 | ||||||||
| PELLETS | 96 | 160 | 160 | 190 | |||||
| Standby mode | <5 | ||||||||
| Boiler efficiency | WOOD | % | 91,8 | 91,6 | 90,3 | 90,3 | |||
| PELLETS | 90,8 | 90,5 | 90,2 | 90,6 | |||||
| Boiler class | WOOD | – | 5 | ||||||
| PELLETS | 5 | ||||||||
| Flue gas temperature by nominal output – wood | °C | 165 | 170 | 185 | 170 | ||||
| Flue gas temperature by nominal output – pellets | °C | 145 | 152 | 168 | 148 | ||||
| Flue gas temperature by min. – pellets | °C | 109 | 116 | 129 | 110 | ||||
| Flue gas flow by nominal output – wood | kg/s | 0,018 | 0,02 | 0,022 | 0,025 | ||||
| Flue gas flow by nominal output – pellets | kg/s | 0,005 | 0,007 | 0,009 | 0,012 | ||||
| Max. noise level | dB | 65 | 65 | 65 | 65 | ||||
| Prescribed fuel | WOOD | – | Suché drevo s výhrevnosťou 15 – 17 MJ/kg,water content min. 12 % – max. 20 %, Æ 80 – 150 mm | ||||||
| PELLETS | – | Wood pellets, Æ 6 mm, l = 35 mm, humidity max 12 %,according to standards: DIN 51 731 – HP 5, DIN Plus, or EN 14961-2 – A1 | |||||||
| Fuel consumption | WOOD | Kg/h | 6,5 | 7,8 | 9,1 | 10,4 | |||
| PELLETS | 2,4 – 6,9 | 2,4 – 6,9 | 2,4 – 6,9 | 2,4 – 6,9 | |||||
| Approximate wood consumption per season | 1 kW = 1 m3 | ||||||||
| Maximal length of wood logs | mm | 650 | |||||||
| Combustion time at nominal output | hod | 8 | 7,2 | 6,5 | 5,8 | ||||
| Volume of water in the boiler | l | 117 | |||||||
| The minimum volume of buffer tank | l | 1500 | 2000 | 2200 | 2500 | ||||
| Capacity of the contacts of the boiler regulator | V/Hz | 230/50 | |||||||
| Min. return water temperature | °C | 65 | |||||||
| Range to set the heating water temperature | °C | 65 – 90 | |||||||
| Load capacity of controller contacts | V/A | 230/2 | |||||||
| Connection to heating. system | “ | G 6/4″ | |||||||
Manufacturer, ATTACK, s.r.o. reserves the right to make technical changes to products without prior notice!
High-quality processing
All our products are manufactured with an emphasis on the selection of quality materials and the use of correct technologies and procedures. Special boiler steel, movable turbulators, and refractory concrete pieces withstanding temperatures up to 1350 °C. Quality processing and own know-how are a guarantee of reliable service and long life.
Higher boiler power with an accumulation tank
To achieve higher boiler power, we recommend purchasing an accumulation tank and an ATTACK Oventrop mixing device for the boiler.
Find out what benefits an accumulation tank brings
The fuel change is up to you
A great advantage is the economic choice of fuel and increased comfort thanks to the fully automatic pellet burner.
Green Households subsidy program
Take advantage of a great chance to get a new modern device for a family house with a subsidy. Request a price offer, and we will handle the entire process, including the subsidy, for you.
Choose a service partner
Creating a high-quality and prompt service network for our customers is very important to us. Our service partners thus provide prompt service assistance to every customer throughout the year.
