The Vulcano “Click” are a wall mount gas boiler series for covering the warm water demands of flats or one family houses. A unique and innovative feature is the HDG variant which produces the electricity needed for operation with a hydrodynamic generator which is activated when the water tap is opened. This makes the appliance independent of mains supply or batteries. The Vulcano “Click” series is designed in the new “light drop” design line, equipped with an orange-red status light in the shape of a stylised flame, always showing the user in which status the appliance currently is.