Universal boiler type KDS+20kW for firewood 5th class EcoDesign with draft regulator

The KDS+ type heating boiler is designed for heating with firewood in residential, workshop and other houses.

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  • Code: KDS-PLUS-20-KW
  • Manufacturer: KONSTAL PLESZEW
  • Manufacturer's code: 5906079680011
  • Availability: Exists Exists

  • Price history
  • Energy efficiency class: A+
    • 9,000.00 zł 8,500.00 zł
    • szt
    • Payment in cash, Payment via bank transfer, eRaty Santander Consumer Bank, Przelewy24, Płatności Ratalne i odroczone
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    The product is shipped within 24 hours.

    Nominal boiler power [kW]: 20
    Basic fuel: hardwood type A with a moisture content of 12-20%
    Area of ​​the heated room [m2]: 120-220
    Water capacity: 83
    Chimney draft [mbar]: 0,27
    Working pressure [bar]: 2
    Water test pressure [bar]: 4
    Charging chamber capacity [liter]: 66
    Charging opening [mm]: 280x300
    max. operating temperature [C*]: 90
    Total width [mm]: 497
    Depth [mm]: 675
    Height [mm]: 1366
    Flue outlet diameter [mm]: 175
    Connections [mm]: DN 50 (lub na zamówienie)
    Power supply [A/W]: brak

    The KDS+ boiler is a new model - a wood gasification boiler with manual loading that meets the requirements of the 5th class according to the latest PN-EN 303-5: 2021 standard and the requirements of ecodesign (ecodesign). It is a solution for customers who value simplicity and versatility.

    Przekrój kotła na zgazowanie drewna typ KDS+ holzhas

    It is a lower combustion boiler that gasifies wood. With a large fire chamber. It is equipped with a ceramic nozzle, which is registered as a utility model and an industrial design. The task of this nozzle is to compress the gases from the furnace and burn them with a mixture of primary and secondary air. This allows you to achieve very good wood burning parameters.

    The requirement for proper installation of the boiler is the use of an accumulation buffer. It is selected according to the boiler power.




    The KDS+ boiler can be installed in both an open and closed system.


    Drewno - ekologiczne paliwo

    Firewood is a natural and ecological source of energy. Used for years for heating purposes, it should undergo a series of preparatory treatments. Wood intended for combustion should be cut and chopped into logs suitable for the boiler furnace. The most important is the so-called seasoning of wood, what means its proper drying. Only properly dried deciduous wood gives us the confidence that our boiler will not smoke and will be environmentally friendly.

    Most importantly, wood is characterized by a zero CO2 emission balance, which is not always obvious in the case of other forms of house heating.



    Wood Gasification Boilers: Ecological Heating, Low Costs and Safety


    When we think about heating our homes, it is worth paying attention to ecological solutions that are not only environmentally friendly, but also more economical. Among them, wood gasification boilers stand out as an excellent alternative to traditional boilers. In this article, we will take a closer look at this solution, and in particular the KDS+ model.

    What is a Wood Gasification Boiler?

    Gasification proces

    A wood gasification boiler is a device that uses the gasification process to generate heat. Wood gasification is the partial combustion of wood in the absence of oxygen, resulting in gas, which is then burned in another part of the boiler, ensuring more efficient use of energy.

    Ecological advantages

    Reduction of Pollutant Emissions

    Compared to traditional boilers, wood gasification boilers emit significantly less pollutants. The gasification process is more controlled, leading to cleaner combustion. In the case of KDS+ boilers, they also meet stringent ecological standards, such as PN EN 303-5: 2021 Ecodesign.

    Renewable energy source

    By using wood as fuel, we use a renewable energy source. This is particularly important in the context of climate change and the need to reduce carbon dioxide emissions.

    Low Operating Costs

    Energetic efficiency

    Wood gasification boilers are more energy efficient than traditional boilers. The KDS+ 20kW model, for example, provides more power with less fuel consumption, thus lowering heating costs.

    Fuel saving

    Thanks to the better use of energy contained in wood, boilers of this type consume less fuel, which also translates into lower operating costs.

    Preparation of Wood for Burning

    Choosing the right type of wood

    As fuel, hardwood with a moisture content between 12 and 20% is best. Wood should be properly seasoned and stored in a dry place.

    Cutting and drying

    Before use, the wood must be properly cut into pieces of the appropriate size. They must then be properly dried for better combustion and higher efficiency.

    Wood with bark should be chopped into pieces to allow moisture to escape from the inside.


    Types of wood and their influence on the gasification process

    Hard vs soft wood

    An important aspect in the selection of wood for gasification boilers is the type of wood. Hardwoods such as oak and beech have a higher calorific value compared to softwoods such as pine. Thanks to this, hardwoods allow for longer and more effective heating.

    Wood moisture

    Wood intended for burning should be sufficiently dry. Wet wood has a lower calorific value and leads to lower combustion efficiency, which can result in higher heating costs and more pollutant emissions.

    Impact on Air Quality and Health

    The importance of clean combustion for air quality

    The clean combustion of wood in gasification boilers also has a direct impact on air quality. By reducing the emission of harmful substances, such as dust and nitrogen oxides, gasification boilers contribute to the improvement of air quality, which has a positive impact on human health.

    Reducing the impact on climate change

    In addition, by using wood as a renewable energy source, gasification boilers help reduce carbon dioxide emissions, which is important in the fight against climate change.

    Investing in the Future: The Economic Aspect

    Payback period

    Replacing an old boiler with a modern wood gasification boiler, such as the KDS+ 20kW, can be a significant investment, but thanks to lower operating costs, this investment begins to pay off within a few years.

    Value of the property

    An investment in a modern heating system can also have a positive impact on the value of the property, thanks to increased comfort and modern technological solutions.


    Replacing an old boiler with a modern wood gasification boiler, such as KDS+ 20kW, is a decision that brings both ecological and economic benefits. Thanks to the use of renewable energy sources, improvement of air quality, as well as lower operating costs, this investment has a positive impact on the household budget, health and the environment. Modern control and security systems also ensure comfort and safety of use, which makes wood gasification boilers an attractive alternative to traditional heating systems.


    Summary: Why is it worth replacing the old boiler with KDS+ 20kW?

    Replacing an old coal and wood boiler with a new KDS+ 20kW wood gasification boiler brings many benefits. Firstly, it is a much more ecological solution, thanks to the reduction of pollutant emissions and the use of renewable energy sources. Secondly, thanks to the higher energy efficiency, you can save on heating costs. In addition, modern boilers are safer to use thanks to the use of various protections and a controlled combustion process. Wood preparation is also important for optimizing the gasification process, and proper wood storage and drying ensures higher yields. All in all, an investment in a new wood gasification boiler, such as KDS+ 20kW, is an investment both in ecology and in our household budget.

    Ask a question about the product. Our team will be happy to provide a detailed answer to your inquiry.

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