ATMOS DC40GSP wood and pellet boiler – powerful combination boiler with 39 kW
The ATMOS DC40GSP is a powerful combination boiler for burning firewood and wood pellets. The unit combines efficient wood gasification with the convenience of an automatic pellet burner. This allows flexible switching between manual wood operation and automatic pellet operation.
With a wood output of 39 kW the biomass boiler is particularly suitable for larger single-family homes, multi-family houses, and buildings with higher heat demand. The combination of wood and pellet operation enables reliable and comfortable heat supply.
Highlights and benefits
- ⭐ Combination boiler for firewood and wood pellets in one heating system
- ⭐ Heating output up to 39 kW for buildings with high heat demand
- ⭐ Automatic pellet operation possible after the wood has burned out
- ⭐ Efficiency up to over 92 % for efficient fuel utilization
- ⭐ Boiler class 5 according to EN 303-5 for modern biomass heating systems
Areas of application & target group
The ATMOS DC40GSP is particularly suitable for larger buildings and systems with higher heat demand.
- larger single-family homes
- multi-family houses
- agricultural buildings
- workshops and commercial properties
- heating systems with buffer storage
By combining firewood and pellets, the boiler offers high flexibility. Wood can be manually reloaded, while pellets are fed automatically.
Everyday benefits
The combination boiler allows comfortable use of two fuels. When heating with wood, the boiler operates as a powerful wood gasification boiler. Once the wood has completely burned out, the pellet burner can start automatically and continue heating operation.
This ensures reliable heat supply even when no wood is reloaded. This reduces the effort required for daily heating operation.
Technology & equipment
The ATMOS DC40GSP features a robust steel construction with a ceramic combustion chamber. Several thermostats and control components ensure safe and efficient operation.
- Boiler thermostat for output control
- Flue gas thermostat for controlling the induced draft fan
- Safety thermostat (STB) to protect against overheating
- Servo flap for automatic air control
- Preparation for electronic heating control
Air supply and combustion are automatically adjusted to the respective fuel, enabling stable and efficient operation.
Efficiency & environment
The combination boiler achieves an efficiency of about 92 %in wood operation. In pellet operation, the efficiency is around 92.8 %. This ensures particularly efficient use of the fuel used.
The ATMOS DC40GSP meets the requirements of boiler class 5 according to EN 303-5 and complies with modern emission standards for biomass heating systems.
Compatibility & system integration
For efficient operation, the combination boiler is typically installed with a buffer tank. This allows the generated heat to be stored and distributed evenly throughout the heating system.
The ATMOS DC40GSP can be integrated into various heating systems:
- Buffer tank
- Radiator heating systems
- Underfloor heating systems
- Domestic hot water preparation
Technical data
| Manufacturer |
ATMOS |
| Model |
DC40GSP |
| Product type |
Wood and pellet combination boiler |
| Wood output |
39 kW |
| Pellet output |
8 – 24 kW |
| Boiler efficiency (wood) |
92 % |
| Boiler efficiency (pellet) |
92.8 % |
| Energy efficiency class |
A+ |
| Boiler class |
5 according to EN 303-5 |
| Heating surface |
4.9 m² |
| Fuel hopper volume |
150 dm³ |
| Max. working pressure (water) |
250 kPa |
| Boiler weight |
745 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 |
Accessories & system recommendation
For safe and efficient operation, we recommend combining the boiler 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. All applicable regulations as well as the manufacturer's installation and operating instructions must be observed.
FAQ
Can the ATMOS DC40GSP burn wood and pellets?
Yes, the combination boiler is designed for log wood and wood pellets and allows flexible operation with both fuels.
What is the heating output?
The output in wood mode is 39 kW. In pellet mode, the output range is between 8 and 24 kW.
Is a buffer tank necessary?
A buffer tank is recommended for efficient operation.
Which fuels may be used?
Dry log wood with a residual moisture content of approx. 12–20% as well as wood pellets with a diameter of 6–8 mm may be used.
Does the pellet burner start automatically?
The pellet burner can start automatically as soon as the loaded wood has burned out and heat is still required.
What power supply does the boiler require?
The combination boiler requires a mains voltage 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.
You can find more information on the process, requirements, and services in our article on [ATMOS commissioning].
