92 %
Efficiency
Possible conversion to
COMBI PELLET
Long burning
time
Large loading
chamber
ATTACK SLX is an ecological wood gasifying boiler of the 5th emission class, which offers high-quality construction. It offers a professional solution for the most demanding customers. In the LAMBDA Touch version, the boiler has automatic air control and turbulator cleaning, and it can be connected to the internet and controlled remotely. High combustion efficiency of up to 92% saves significant heating costs. An extra-large loading chamber can save significant time on wood processing. The boiler offers simple operation, high comfort, and the possibility of conversion to a combined boiler and heating only with pellets.
The wood gasifying boiler is suitable for every type of house
A wood 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.
Large loading chamber and long burning
We have equipped the ATTACK SLX with an extra-large loading chamber for the power ranges 20 – 55 kW (200 to 230 liters) with a length of (650 mm to 750 mm). Thanks to the large chamber, you save time preparing wood. You only need to divide the meter stick once. Fuel with the right moisture content can burn for 8 to 12 hours (only applies to continuous operation).
Practical advice for the solid fuel boiler
Wood gasifying 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.
- 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
- 7-inch touch display
- Internet connection – control via PC and smartphone
- Simple settings and fault diagnostics
- Possibility of remote system update
- Connection of external heat sources and multiple heating circuits
- Weather-compensated regulation
- Automatic primary and secondary air control and heat exchanger cleaning by servomotor
- Control of 2 mixing circuits, DHW tank, solar panels
- Boiler switch-on after heat consumption from the accumulation tank
- Built-in protection against accumulation tank discharge
Technical information on important parts of a wood-burning boiler that might interest you.
Lambda probe
It is used to monitor the oxygen content
Control panel
The boiler has a choice of two types of control electronics:
PROFI – Electronics with simple operation. With this electronics, the air supply control and exchanger cleaning are manual. More about PROFI electronicsPROFI
LAMBDA Touch – Electronics with 7-inch SMART LCD display. The air supply and cleaning of the heat exchanger are controlled automatically by servomotors. LAMBDA TouchLAMBDA Touch
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%. The turbulators will also take care of a clean heat exchanger for you, in the LAMBDA Touch version.
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.
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.
Loading chamber door
Through the loading door, it is possible to load wood with a length of up to (650 mm and 750 mm) into the boiler. The boiler has an oversized loading chamber with a volume (200 and 230 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. Only the PROFI version has a manual lever. The LAMBDA Touch version is equipped with automatic turbulator cleaning by means of a servomotor.
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.
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.
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.
Flue gas exhaust duct
The duct prevents unwanted smoke from the chamber.
Technical data and documents for download
The wood gasifying boiler ATTACK SLX offers high efficiency up to 92%, a large loading chamber, long burning, automatic air control, cleaning, dry coat, flue gas exhaust, high-quality processing, and long life. Find out more about other technical data.
- Possibility of conversion to a combined boiler
- High combustion efficiency 92%
- Wide power range 20, 25, 30, 35, 40, 45, 50, 55 kW
- Long burning 8 to 12 hours
- Large loading chamber up to 650-750 mm / 200-230 liters
- Choice of Profi or Lambda Touch regulation
- Refractory concrete pieces withstanding temperatures up to 1350 °C
- Dry coat – protection against tar
- Automatic air supply control and heat exchanger cleaning
- 7-inch display and possibility of internet connection
- Possibility of complex house control (Radiators, solar heating, DHW heating, underfloor heating).
| Boiler type | |||||||||
| Parameter | Unit | SLX20 | SLX25 | SLX30 | SLX35 | SLX40 | SLX45 | SLX50 | SLX55 |
| Nominal output of the boiler | kW | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 55 |
| Output range | kW | 10 – 20 | 12,5 – 25 | 15 – 30 | 17,5 – 35 | 20 – 40 | 22,5 – 45 | 25 – 50 | 27,5 – 55 |
| Area of the exchanger | m² | 2,95 | 3,32 | ||||||
| Loading chamber volume without dry jackets | dm³ | 200 | 230 | ||||||
| Dimensions of the feeding hole | mm | 235×445 | |||||||
| Prescribed chimney draught | Pa | 23 | |||||||
| Prescribed chimney draught | mbar | 0,23 | |||||||
| Max. working overpressure of the water | kPa | 250 | |||||||
| Pressure loss of the water (ΔT 10K) | kPa | 1,9 | 2,1 | 2,4 | 2,7 | 3,9 | 4,5 | 5,2 | 6,1 |
| Pressure loss of the water (ΔT 20K) | kPa | 0,8 | 0,9 | 1,2 | 1,6 | 1,9 | 2,1 | 2,4 | 3,2 |
| Weight of the boiler | kg | 570 | 650 | ||||||
| Diameter of the flue gas outlet | mm | 150 | |||||||
| Height of the boiler | mm | 1472 | |||||||
| Width of the boiler | mm | 703 | |||||||
| Depth of the boiler | mm | 1337 | 1506 | ||||||
| Depth of the feeding chamber | mm | 650 | 750 | ||||||
| Diameter of the riser pipe “E” | “ | G 6/4″ | G 2″ | ||||||
| Diameter of the reverse “F” | “ | G 6/4″ | G 2″ | ||||||
| Protection class | IP | 21 | |||||||
| Electrical input at the nominal output | W | 42 | 78 | ||||||
| Electrical input at the minimal output | W | 31 | 52 | ||||||
| Electrical input at the standby mode | W | < 15 | |||||||
| Boiler efficiency | % | 91,8 | 91,6 | 90,3 | 90,3 | 90,4 | 90,4 | 90,3 | 90,3 |
| Boiler class | — | 5 | |||||||
| Temperature of the flue gas by the nominal output | °C | 165 | 170 | 175 | 180 | 165 | 170 | 170 | 180 |
| Temperature of the flue gas by the minimal output | °C | 130 | 135 | 140 | 145 | 135 | 140 | 140 | 145 |
| Mass flow of the flue gas by the nominal output | kg/s | 0,018 | 0,02 | 0,021 | 0,023 | 0,027 | 0,029 | 0,031 | 0,033 |
| Mass flow of the flue gas by the minimal output | kg/s | 0,008 | 0,011 | 0,014 | 0,016 | 0,017 | 0,021 | 0,022 | 0,023 |
| Max. noise level | dB | 65 | |||||||
| Class and type of the fuel | — | A, Wood logs with relative humidity of 12 % – max. 20 %, ∅ 50 – 150 mm | |||||||
| Average wood consumption | kg/h | 5,2 | 6,5 | 7,8 | 9,1 | 10,4 | 11,7 | 13 | 14,3 |
| Indicative consumption of the wood per season | — | 1 kW = 1 m3 | |||||||
| Max. length of logs | mm | 650 | 750 | ||||||
| Time of burning by nominal output * | h | 8 | 7,2 | 6,5 | 5,8 | 6 | 5,1 | 4,6 | 4 |
| Volume of the water in the boiler | l | 117 | 136 | ||||||
| Voltage | V/Hz | ~230/50 | |||||||
| Range of the setting the temperature of the heating water | °C | 65 ÷ 85 | |||||||
| Capacity of the contacts of the boiler regulator (PROFI version) | — | 2 A/ ~230 V | |||||||
| Minimum storage tank volume (l) | l | 500 | 600 | 700 | 800 | 1000 | 1100 | 1200 | 1300 |
| Recommended storage tank volume (l) | l | 1000 | 1400 | 1600 | 2000 | 2200 | 2500 | 2800 | 3000 |
* dependent on type of fuel and the perfection of feeding the chamber by wood.
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
Simple fuel change
The choice of fuel is up to you. Wood gasifying boiler ATTACK SLX offers the possibility of conversion to a combined boiler. Changing fuel is simple and can be handled by everyone. By purchasing a fully automatic pellet burner, which is mounted on a positional pantograph, it can be very easily inserted into the boiler’s upper door, and you can use pellets as fuel. 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 wood boiler for a family house with a subsidy of up to €1,500. 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.
