Defro Firewood Plus 24 kW – Efficient natural draft boiler for logs

Modern, space-saving design

The Defro Firewood Plus 24 kW natural draft boiler combines a modern, compact form with high functionality and a contemporary design. Its slim dimensions make this model ideal for boiler rooms with limited space. The robust boiler body is constructed from high-quality materials, ensuring not only an attractive appearance but also stability and a long service life. The solid construction reflects the manufacturer's commitment to quality and ensures reliable use for many years.

Electronic draft regulator and control comfort

A key feature of the Defro Firewood Plus is the integrated electronic flue controller, which automatically adjusts the primary air supply to the current combustion process. This achieves an outstanding efficiency of up to 92.3% and optimizes fuel consumption. Optionally, the control system can also control the boiler circuit pump and an induced draft fan, providing even greater control and energy efficiency. The arrangement of the secondary air controls on both sides of the boiler allows the boiler to be positioned close to a wall, freeing up valuable space for additional heating components.

Safety and environmental compatibility

A factory-installed safety heat exchanger ensures that no additional thermal discharge safety device is required, significantly simplifying installation. The Defro Firewood Plus meets the requirements of BImSchV Stage 2 and thus contributes to reducing emissions. CE conformity further confirms the highest safety standards. The integrated sight glass allows for convenient and safe monitoring of the gasification process, making the boiler particularly easy to operate.

Assembly and commissioning

Installation and initial commissioning throughout Germany are carried out upon request by expert customer service. To ensure stress-free transport, delivery is made by truck with a lifting platform directly to the curb. After installation and connection to the closed heating system, the boiler is immediately available and ready for use.

Advantages at a glance

The Defro Firewood Plus 24 kW impresses with its compact, solid boiler body, the convenient electronic draught regulator instead of traditional mechanical air control, and the built-in safety heat exchanger. The integrated sight glass ensures easy monitoring of flame formation. The natural draught boiler uses sustainable logs as an environmentally friendly energy source and also offers the option of combining it with modern heat pump systems, guaranteeing flexibility and future-proofing.

Firewood Plus - Benefits

• solid boiler body in compact form,
• electronic draught regulator as mechanical combustion air control,
• factory-installed safety heat exchanger,
• easy access to the heat exchanger chamber behind the combustion chamber,
• Natural draft boilers as a sustainable, crisis-proof heat source,
• can be combined with heat pumps.

Technical data

• Model: Firewood Plus 24
• Energy efficiency class: A+
• Nominal heat output: 24 kW
• Efficiency: 92.3%
• Tension requirement: 24 Pa
• CO content: 13.1%
• Prescribed fuel: logs (max.Length 390 mm)
• Exhaust gas temperature: 154 °C
• Exhaust gas mass flow: 19 mg/m³
• Flue pipe connection: Ø 180 mm
• Height: 1460 mm
• Width: 655 mm
• Depth: 1035 mm
• Weight: 429 kg

Scope of delivery

• Defro Firewood Plus 24 kW included

  • built-in safety heat exchanger
  • electronic draft regulator
  • Cleaning tool
  • Assembly & Operating instructions