Wood and pellet boiler ATMOS DC18GSP 19 kW combination boiler

ATMOS DC18GSP wood and pellet boiler – combination boiler for flexible heating systems

The ATMOS DC18GSP This is a modern combination boiler for burning logs and wood pellets. The unit combines the advantages of a high-performance 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 burning and automatic pellet operation are desired.

With a wood output of up to 19 kW With its high efficiency, the dual-fuel boiler operates efficiently and reliably. Automatic switching and the option of automatic burner start ensure a high level of user-friendliness in everyday heating operations.

Highlights and benefits

• ⭐ Combination boiler for Firewood and wood pellets in a heating system
• ⭐ Wood output up to 19 kW for single-family homes
• ⭐ Automatic start of the pellet burner after 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

Area of ​​application & Target audience

The ATMOS DC18GSP is suitable for:

• Private customers with their own timber stock
• Plumbing, heating, and air conditioning (SHK) specialists in new construction and renovation projects
• Single-family homes with buffer storage
• Heating systems with a combination of log and pellet operation

The combination of wood gasification and pellet operation allows for flexible operation of the boiler. Logs can be added manually, while pellets are fed automatically.

Everyday benefits

The dual-fuel boiler enables particularly convenient heating operation. When using logs, the upper and middle combustion chambers are used. For pellet operation, a pellet burner operates in the lower combustion chamber. The air supply and damper position are automatically adjusted to the respective fuel type. This ensures stable and efficient boiler operation.

Additionally, the pellet burner can start automatically as soon as the loaded wood has completely burned and heat is required. This function increases convenience and reduces manual intervention.{index=1}

Technology & equipment

The ATMOS DC18GSP features a robust steel construction with a ceramic combustion chamber lining. Combustion is controlled by multiple thermostats and control components.

• Boiler thermostat for power control
• Flue gas thermostats for controlling the fan and air dampers
• Safety thermostat to protect against overheating
• Servo flap for automatic air control
• Slot for electronic heating control

The control system automatically adjusts air supply and operating parameters to the respective fuel. This ensures stable and efficient heating operation.

Efficiency & Environment

The combination boiler achieves an efficiency of over [value missing] when operating on wood. 90%. In pellet operation, the efficiency is even around 92.7%. This makes the fuel used particularly efficient.

The boiler meets the requirements of Boiler class 5 according to EN 303-5 as well as meeting emission standard II of the German Federal Immission Control Ordinance (BImSchV) and is therefore suitable for modern heating systems. :contentReference[oaicite:2]{index=2}

compatibility & System integration

The ATMOS DC18GSP is usually operated in combination with a buffer memory.This improves the efficiency of the system and ensures a consistent heat supply throughout the building.

The boiler can be integrated into various heating systems:

• Buffer storage
• radiator systems
• Underfloor heating
• Hot water preparation

Technical data

Manufacturer	ATMOS
Model	DC18GSP
Product type	Wood and pellet combination boiler
Wood performance	19 kW
Pellet output	4.5 – 19 kW
Boiler efficiency wood	90.3%
Boiler efficiency pellet	92.7%
boiler class	5 according to EN 303-5
Energy efficiency class	A+
heating surface	3.2 m²
Fuel shaft volume	80 dm³
Max. working pressure water	250 kPa
boiler weight	547 kg
Exhaust connection	150/152 mm
Electrical connection	230 V/50 Hz
Protection class	IP20
Prescribed return temperature	65 °C
Operating temperature	80 – 90 °C

Scope of delivery

Included in the scope of delivery are, among other things, temperature sensors for integration into the heating system and connection options for controlling the heating system.

Accesories & System recommendation

For efficient operation, it is recommended to combine it with suitable system components such as buffer storage tanks, return temperature boosts and safety groups.

Assembly and safety instructions

The boiler must be installed exclusively 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 logs and wood pellets.

What is the boiler's power output?

The output in wood-burning mode is up to 19 kW. In pellet mode, the output range is between 4.5 and 19 kW.

Is a buffer storage tank required?

A buffer storage tank is recommended for efficient and safe operation.

Which fuels may be used?

The required materials are dry firewood with a residual moisture content of approximately 12–20% and wood pellets with a diameter of 6–8 mm.

Does the pellet burner start automatically?

The pellet burner can start automatically as soon as the inserted wood has burned out and there is a need for heat.

What type of electrical supply does the boiler require?

The boiler requires a mains connection of 230 V at 50 Hz.

Download

• User manual
• Supplement to the operating instructions
• exploded view
• Brochure Combination Boilers
• Declaration of Conformity Pellets