Solid fuel boiler with manual loading DEFRO KDR PLUS 3 A 20 kW

DEFRO KDR PLUS 3 A – powerful long-burning solid fuel boiler

DEFRO KDR PLUS 3 A is a modern heating equipment designed for heating living spaces and country houses with an area of up to 200 m². The boiler is equipped with an intelligent control system with a PID controller, which allows regulating the air supply to the combustion chamber. The built-in fan controls the fuel combustion rate, ensuring a stable temperature of up to 85°C.

If the heating level exceeds the set parameters, the system automatically reduces the air supply intensity or completely stops it, increasing energy efficiency and operational safety. The uniform distribution of air inside the chamber contributes to efficient fuel combustion, ensuring stable operation at various power modes.

The smart boiler control allows connecting two pumps (for the heating system and HWS), as well as a boiler temperature sensor, making it a convenient and functional heating solution.

Flexible fuel options

Thanks to its thoughtful design, the DEFRO KDR PLUS 3 A can operate on various types of solid fuel:

Upper loading – coal fines.

Lower loading – wood, coal, eco-peas, briquettes, chips.

Technical features for maximum efficiency

Durable heat exchanger – made of heat-resistant boiler steel P265GH (6 mm thick), produced by ArcelorMittal (Poland).

Efficiency up to 83% – achieved through a multi-stage heat exchange system that effectively utilizes the heat of flue gases.

Advanced thermal insulation – the use of mineral wool reduces heat loss and protects the user from accidental burns.

Automated control – the S3P controller regulates the air supply and manages the operation of two pumps.

Multi-point air injection system – promotes uniform fuel combustion, increases operating time without refueling, and maintains a stable combustion process.

Easy cleaning and convenience in operation

Moving grate – thanks to the foot pedal, ash and cinder are easily removed, and metal teeth break the slag layer, improving air intake and increasing combustion efficiency.

Thoughtful smoke removal system – the rear flue position and integrated damper allow for draft adjustment, controlling the combustion process.

Ease of maintenance – the convenient door placement ensures quick cleaning of the heat exchanger and chimney.

Advantages of DEFRO KDR PLUS 3 A

High efficiency (up to 83%) – efficient fuel use and minimal heat loss.

Spacious combustion chamber – long operation without frequent refueling.

Automatic air supply regulation – maintaining stable temperature and saving resources.

Durable construction – made of certified boiler steel P265GH.

Flexibility in fuel choice – the possibility of using wood, coal, briquettes, eco-peas.

Safety and comfort – reliable thermal insulation prevents burns, and the simple cleaning system makes operation convenient.

DEFRO KDR PLUS 3 A is a reliable and efficient heating solution! Ensure your home will have warmth, savings, and comfort for many years!