Solid fuel boiler with manual loading DEFRO KDR PLUS 3 A 35 kW

DEFRO KDR PLUS 3 A – An Innovative Solid Fuel Boiler for Efficient Heating

DEFRO KDR PLUS 3 A is a modern heating system designed to heat country houses and cottages with an area of up to 350 m². Equipped with an intelligent control system featuring a PID controller, the boiler automatically adjusts the air supply to the combustion zone. The built-in blower fan optimizes the fuel combustion process, maintaining a stable temperature of up to 85°C.

When the set temperature is reached, the system automatically reduces or stops the air supply, contributing to energy savings and safe operation. The even distribution of air in the combustion chamber increases the boiler's efficiency, ensuring optimal fuel combustion at different power levels.

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

Support for Various Types of Fuel

Thanks to its universal design, DEFRO KDR PLUS 3 A can operate on the following types of fuel:

Top loading – coal dust (slack).

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

Technical Features and High Performance

Durable heat exchanger – made of certified boiler steel P265GH (6 mm) from ArcelorMittal (Poland), ensuring longevity and resistance to high temperatures.

High efficiency (up to 83%) – thanks to a multi-stage heat exchange system, the thermal energy of flue gases is used effectively.

Effective thermal insulation – a layer of mineral wool minimizes heat loss and protects against 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 operation time without refueling, and stabilizes the combustion process.

Ease of Use and Cleaning

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

Optimized smoke removal system – the rear chimney position and built-in draft damper allow for control of combustion intensity.

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

Advantages of the DEFRO KDR PLUS 3 A Boiler

High efficiency (up to 83%) – fuel economy.

Spacious combustion chamber – ensures long operation without frequent refueling.

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

Robust construction – made of high-quality boiler steel P265GH.

Versatility in fuel choice – ability to use wood, coal, briquettes, eco-pea coal.

Safety and comfort – reliable thermal insulation prevents burns, and the well-thought-out cleaning system simplifies maintenance.

DEFRO KDR PLUS 3 A – a reliable and energy-efficient heating solution!
Comfort, durability, and fuel savings – in every detail!