The Druid 12kW - 30kW Multi Fuel boiler stoves are the most popular boiler stove in the Henley range. It is capable of heating up to 7 - 21 radiators depending on the model. It is constructed from high grade steel with a heavy cast iron door. It also has a double combustion system and cool to touch handle. The Druid 21kW, 25kW & 30kW are available with External Air.