Solid fuel boiler with manual loading DEFRO KDR PLUS 3 A 15 kW

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

The DEFRO KDR PLUS 3 A boiler is designed for efficient heating of private houses and cottages with an area of up to 150 m². This is a modern solution equipped with an intelligent control system with a PID controller. The fan regulates the air supply to the combustion zone, controlling the fuel combustion rate and maintaining a stable boiler temperature (up to 85°C).

If the system temperature exceeds the set parameters, the controller automatically reduces or completely stops the air supply, increasing safety and energy efficiency. The distributed air flow in the combustion chamber optimizes the combustion process, ensuring maximum performance at various power modes.

The control system allows connecting two pumps – for heating and hot water supply (HWS), as well as a boiler temperature sensor.

Flexibility in fuel choice

Thanks to its thoughtful design, the DEFRO KDR PLUS 3 A supports the combustion of various types of solid fuel:

Upper loading – coal fines.

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

Design for maximum efficiency

High-strength heat exchanger – made of heat-resistant boiler steel P265GH (6 mm thick), produced at the Polish factory ArcelorMittal.

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

Reliable thermal insulation – mineral wool is installed between the boiler casing and the heat exchanger, preventing heat loss and protecting the user from accidental burns.

Electronic control – the S3P controller regulates the air supply and controls two pumps for circulating the heat carrier.

Multi-point air supply – promotes uniform fuel combustion, increases operating time, and enhances combustion stability.

Easy cleaning and convenient operation

Moving grate – facilitates the removal of ash and cinder from the grate using a special foot pedal. When pressed, metal teeth extend, breaking the slag crust, improving air passage, and increasing combustion efficiency.

Thoughtful smoke removal system – flue gases are discharged through the rear chimney, and draft adjustment is made using a built-in damper that allows controlling the combustion intensity.

Ease of maintenance – the boiler design and convenient location of the firebox doors simplify the cleaning of the heat exchanger and chimney.

Key advantages of DEFRO KDR PLUS 3 A

High efficiency (up to 83%) – efficient use of fuel.

Large combustion chamber – allows the boiler to operate for many hours without reloading.

Automatic air supply regulation – stability of temperature and fuel savings.

Robust construction – made of certified boiler steel P265GH.

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

Safety and convenience – thermal insulation prevents burns, and a convenient cleaning system simplifies maintenance.

DEFRO KDR PLUS 3 A is a reliable and economical choice for your home! Comfort, durability, and efficiency in every detail!