ATMOS DC18GSP wood and pellet boiler – combination boiler for flexible heating systems
The ATMOS DC18GSP is a modern combination boiler for burning split logs and wood pellets. The unit combines the advantages of a powerful wood gasification boiler with the convenience of an automatic pellet heating system. This makes the boiler particularly suitable for single-family homes where both manual wood heating and automatic pellet operation are desired.
With a wood output of up to 19 kW and high efficiency, the dual-fuel boiler operates efficiently and reliably. Automatic switching and the possible automatic burner start ensure a high level of operating comfort in everyday heating.
Highlights and benefits
- ⭐ Combination boiler for split logs and wood pellets in one heating system
- ⭐ Wood output up to 19 kW for single-family homes
- ⭐ Automatic start of the pellet burner after the wood has burned out is possible
- ⭐ High efficiency up to over 90% for efficient operation
- ⭐ Boiler class 5 according to EN 303-5 for modern heating technology
Areas of application & target group
The ATMOS DC18GSP is suitable for:
- Private customers with their own wood supply
- HVAC contractors in new construction and renovation
- Single-family homes with buffer storage
- Heating systems combining split logs and pellet operation
Thanks to the combination of wood gasification and pellet operation, the boiler can be operated flexibly. Split logs can be manually reloaded while pellets are automatically fed.
Everyday benefits
The dual-fuel boiler enables particularly comfortable heating operation. When using split logs, the upper and middle combustion chambers are used. For pellet operation, a pellet burner works in the lower combustion chamber. The air supply and damper positions are automatically adjusted to the respective fuel type. This ensures the boiler operates stably and efficiently.
In addition, the pellet burner can start automatically as soon as the loaded wood has completely burned out and there is a heat demand. This function increases comfort and reduces manual intervention.
Technology & equipment
The ATMOS DC18GSP features a robust steel construction with ceramic combustion chamber lining. Combustion is controlled via several thermostats and control components.
- Boiler thermostat for output control
- Flue gas thermostats for controlling the fan and air dampers
- Safety thermostat to protect against overheating
- Servo damper for automatic air control
- Slot for electronic heating controller
The controller automatically adjusts the air supply and operating parameters to the respective fuel. This enables stable and efficient heating operation.
Efficiency & environment
In wood operation, the combination boiler achieves an efficiency of over 90%. In pellet operation, the efficiency is even around 92.7%. This ensures the fuel used is utilized particularly efficiently.
The boiler meets the requirements of boiler class 5 according to EN 303-5 and the emission level II of the BImSchV, making it suitable for modern heating systems.
Compatibility & System Integration
The ATMOS DC18GSP is typically operated in combination with a buffer tank. This improves the efficiency of the system and ensures even heat supply in the building.
The boiler can be integrated into various heating systems:
- Buffer tanks
- Radiator systems
- Underfloor heating
- Domestic hot water preparation
Technical Data
| Manufacturer |
ATMOS |
| Model |
DC18GSP |
| Product type |
Wood and pellet combination boiler |
| Wood output |
19 kW |
| Pellet output |
4.5 – 19 kW |
| Boiler efficiency (wood) |
90.3% |
| Boiler efficiency (pellet) |
92.7% |
| Boiler class |
Class 5 according to EN 303-5 |
| Energy efficiency class |
A+ |
| Heating surface |
3.2 m² |
| Fuel hopper volume |
80 dm³ |
| Max. working pressure (water) |
250 kPa |
| Boiler weight |
547 kg |
| Flue gas connection |
150 / 152 mm |
| Electrical connection |
230 V / 50 Hz |
| Protection class |
IP20 |
| Required return temperature |
65 °C |
| Operating temperature |
80 – 90 °C |
Scope of delivery
The scope of delivery includes, among other things, temperature sensors for integration into the heating system as well as connection options for the heating system control.
Accessories & System Recommendation
For efficient operation, we recommend combining it with suitable system components such as buffer tanks, return temperature boosters, and safety groups.
Suitable system components
Installation and Safety Instructions
The boiler may only be installed by a qualified heating contractor. National regulations and the manufacturer's operating instructions must be observed.
FAQ
Can the ATMOS DC18GSP burn both wood and pellets?
Yes, the combination boiler is designed for burning log wood and wood pellets.
What is the output of the boiler?
The output in wood operation is up to 19 kW. In pellet operation, the output range is between 4.5 and 19 kW.
Is a buffer tank required?
A buffer tank is recommended for efficient and safe operation.
Which fuels may be used?
Dry log wood with a residual moisture content of about 12–20% and wood pellets with a diameter of 6–8 mm are prescribed.
Does the pellet burner start automatically?
The pellet burner can start automatically as soon as the loaded wood has burned out and there is a heat demand.
What electrical supply does the boiler require?
The boiler requires a mains connection of 230 V at 50 Hz.
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👉 Order commissioning now!
With the "Commissioning by ATMOS" service, you ensure that your boiler is optimally set up and meets all technical requirements.
Further information on the process, requirements, and services can be found in our article on [ATMOS commissioning].
