Solid fuel boiler with manual loading DEFRO KDR PLUS 3 A 40 kW

DEFRO KDR PLUS 3 A – A Powerful and Economical Solid Fuel Boiler for Heating

DEFRO KDR PLUS 3 A is a modern heating unit designed to heat country houses and cottages with an area of up to 400 m². The boiler is equipped with an intelligent control system featuring a PID controller, which automatically regulates the air supply to the combustion chamber. The built-in blower fan adjusts the combustion process, maintaining a stable temperature of up to 85°C.

When the set temperature is reached, the system reduces or stops the air supply, contributing to energy savings and safe operation. The even distribution of air in the combustion chamber improves the boiler's efficiency, ensuring optimal fuel combustion under any load.

The boiler supports the connection of two pumps (for heating and hot water supply) and a boiler temperature sensor, making it functional and easy to use.

Flexibility in Fuel Choice

Thanks to its well-thought-out design, DEFRO KDR PLUS 3 A can operate on various types of fuel:

Top loading – coal dust (slack).

Bottom loading – firewood, coal, eco-pea coal, briquettes, wood chips.

Key Technical Features

Durable heat exchanger – made of heat-resistant boiler steel P265GH (6 mm), manufactured by ArcelorMittal (Poland), ensuring reliability and a long service life.

High efficiency (up to 83%) – achieved through a multi-stage heat exchange system that maximizes the use of flue gas heat.

Effective thermal insulation – a layer of mineral wool minimizes heat loss and protects users from accidental burns when touching the casing.

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

Multi-point air supply system – ensures even fuel combustion, extends autonomous operation time, and stabilizes the combustion process.

Comfortable Use and Easy Cleaning

Movable grate – equipped with a foot pedal that activates metal teeth. These break up the slag layer, improving oxygen flow and combustion efficiency.

Thoughtful smoke removal system – the rear chimney position and built-in adjustable damper allow for control of the combustion process and optimization of fuel consumption.

Easy maintenance – convenient firebox doors provide quick and easy cleaning of the heat exchanger and chimney.

Advantages of DEFRO KDR PLUS 3 A

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

Spacious combustion chamber – allows the boiler to operate for long periods without frequent refueling.

Automatic air supply regulation – maintains stable temperature and reduces fuel consumption.

Robust construction – made of certified boiler steel P265GH.

Flexibility in fuel choice – supports the use of wood, coal, briquettes, eco-pea coal.

Safety and convenience – high-quality thermal insulation prevents burns, and the well-designed cleaning system simplifies maintenance.

DEFRO KDR PLUS 3 A – a reliable, economical, and powerful heating boiler!
Efficiency, safety, and convenience – in every detail!