Wood Gasification Hydronic Boilers


Kroll has released a wood [BIOMASS] gasification hydronic heater, or boiler. Our KK wood boilers are clean and reduce smoke, ash and soot. Hydronic heating systems help reduce dryness in closed environments and are highly sustainable. Forget burning expensive LPG or natural gas fuels for hydronic warmth and get a controlled heating solution with Kroll’s KK series. The KK Series is completely reliable and safe for use.

Kroll Heaters brings you wood hydronic heaters of superior quality and efficiency, the KK series are over 90% efficient by specification and standard compliance.

The KK series is ideal for people with plenty of timber who do not want to constantly fill the fire chamber during the day or night. Usually available are 30 kW and 40 kW units that suit most domestic applications; Bigger units are also available on request.

A gasification boiler converts wood or charcoal into wood gas, which consists of carbon monoxide, hydrogen, carbon dioxide and traces of methane.

Kroll Heaters’ wood hydronic boilers are easy to use and are quite flexible in their operation. Highly versatile and sturdy, these boilers have been designed to ensure maximum efficiency. While the size of the unit is compact, you can be assured of maximum heating with a single boiler. Let us know if you have any special requirements.

The KK Series is optionally available with:

  • The Swedish Hydronics group, LK Armatur, is supplying Kroll with it’s LK 810 thermal tank charging system which manages boiler protection & circulation as well as the thermal tank charging or filling. Note the LK810 uses the renowned Grundfos high efficiency UPM3 AUTO L circulator to provide the circulation
  • A number of 1000 litre Stainless Steel thermal tank, also known as an accumulator tank, stores 80C to 90C hot water for your home heating demands, hours after the wood fire has gone out. Of course these are Watermarked to suit Australian plumbing standards.
  • A Kroll KG50 waste oil boiler to exchange heat with the accumulator tank if the client wishes to use a combination of wood and waste oil fuels.
  • A slab floor heating low-temperature mixing system to manage floor surface temperatures, built around the LK 840 ThermoMix three way valve with motorised control.

Various remote monitoring systems are also available to send your system’s data such as the thermal tank temperatures or room thermostat settings.

The KK Series all include an inbuilt safety heat exchanger coil to dump heat if the water temperature exceeds 95C. This uses the LK 519 ThermoSafe wood safety valve to supply cold water to the safety coil

The KK Series is manufactured by Arikazan in Turkey.

Our wood gasification boilers are highly cost-effective – be it the price of the product or the running costs.


    The KK wood gasification boilers are designed to be installed in an outbuilding or utility room. They have large wood fire chambers to let you easily heat your house and domestic hot water.

    Essentially, after starting a kindling fire and producing a bed of hot coals, you then fill the firebox up with logs and then walk away – the gasification boiler then burns for three to four hours. Gasifying boilers are batch burners meaning that you load them right up, burn them hard, let them burn down, and then reload if needed. This is a very efficient way of burning wood which produces low levels of emissions.

    The heat from the wood is often stored in a thermal storage for use as and when needed, although you can connect a gasification boiler directly to a standard heating system.

    A log boiler used with a thermal storage tank gives you the ability to decide when and how you want the heat in your home, independent of there being an active fire in the boiler.

    Running your whole house with a log boiler does mean using a fair bit of wood – we would recommend these boilers to people who have sufficient room to store a decent amount of firewood, ideally with some storage in the boiler room itself for simplicity and to further dry the wood.

    Kroll’s KK series wood boiler supports all kinds of heating systems and is highly adaptable. These boilers are durable and long-lasting. The burning process is clean and requires little labour from your side. The boilers make you more energy-independent and are highly time-saving as well.

    Buy Kroll Heaters’ wood gasification boilers to ensure effective hydronic heating. Kroll provides a hydronic design service to advise plumbers and electricians information on building the system.

    Explore our complete range online and consider buying our wood boilers today. In case of any query or confusion, get in touch with Kroll Heaters on 1800 805 243

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