The Achill 17kw multi fuel Insert boiler is capable of heating up to 9/10 single radiators. It will fit most standard 16/18″ fireplace openings and is Constructed from steel with a cast iron door with an efficiency level of over 77%. It is thermostatically controlled which combined with both primary and secondary air allows for exceptional control. https://laoisstone.ie/product/achill-17kw-boiler-insert-stove/