Product Overview & Application Area
The Attack SLX Combi Pellet 35 kW is a combination boiler for wood and pellets that combines classic log wood operation with automated pellet operation in a single heating boiler. It is suitable as a heat generator for residential buildings and comparable properties when boiler output, chimney, and heating system are professionally matched to one another.
The Plus version additionally includes a pellet hopper with a 500-liter capacity and an auger feed screw with a length of 2 meters. This makes the product designed for operation with external pellet feed while remaining usable for log wood operation.
Technology & Equipment
In wood operation, the boiler works on the wood gasification principle with an induced draft fan. For pellet operation, the pellet burner is guided on the boiler via the pantograph system; the pellets are transported from the pellet hopper to the burner via the external auger feed screw.
The pellet burner features electric ignition and burner cleaning. The PROFI control system supports operation with clear controls and display of important operating information. The boiler body is water-cooled and thermally insulated.
Everyday Benefits
The combination boiler enables the use of log wood and wood pellets in one system. In log wood operation, the large loading chamber offers practical loading, while pellet operation reduces the effort required for operation through automatic ignition and fuel feed.
The 500-liter pellet hopper supports longer operating phases in pellet mode without the need for constant refilling. The separate operation of the fuels remains important here: wood and pellets are not operated simultaneously.
System Integration & Compatibility
The Attack SLX Combi Pellet 35 kW is integrated into a water-based heating system and requires a professionally planned flue gas routing as well as an appropriate combustion air supply. For wood operation, integration with return temperature control and a buffer tank is technically advisable so that the boiler can be operated within the intended temperature range.
In pellet operation, fuel is supplied via the pellet hopper and screw conveyor. The specific design of the entire system depends on the building, heat demand, hydraulics, chimney, and local installation conditions.
Technical data at a glance
The following technical data refers to the Attack SLX Combi Pellet 35 kW and the verified boiler data.
| Nominal output | 35 kW wood / 30 kW pellets |
| Output range | 17.5–35 kW wood / 8–30 kW pellets |
| Fuel | Log wood and wood pellets |
| Combustion technology | Wood gasification / automatic pellet operation |
| Efficiency | 90.3% wood / 90.6% pellets |
| Boiler class | 5 |
| Max. flow temperature | 90 °C |
| Max. operating pressure | 2.5 bar |
| Log length | 650 mm |
| Draft requirement | 23 Pa |
| Flue pipe connection | 150 mm |
| Pellet operation possible | Yes |
| Automatic cleaning | Burner cleaning |
| Ignition system | Electric ignition |
| Height | 1,472 mm |
| Width | 703 mm |
| Depth | 1,650 mm with burner |
| Voltage | 230 V |
| Frequency | 50 Hz |
| Power consumption | 42 W wood / 190 W pellets / 600 W ignition / <5 W standby |
Installation
Installation includes positioning the boiler, hydraulic connection, flue pipe connection, electrical connection, and installation of the pellet container and feed screw. This should be carried out by qualified professionals to ensure that the heating system, chimney, return temperature control, safety devices, and pellet feed are correctly coordinated.
Notes
The boiler is designed for split logs and wood pellets, but not for simultaneous operation with both fuels. For operation, dry, suitable fuels must be used, and the instructions in the operating and installation documents must be observed. Maintenance, cleaning, and commissioning should be carried out in accordance with the manufacturer's documentation.
Scope of delivery
- Attack SLX Combi Pellet 35 kW Plus combination boiler
- 500-liter pellet container
- 2-meter feed auger