Boiler built with selected materials. The tank and all parts in touch with water are built in stainless steel AISI 316 and welded with inert gas to avoid any corrosion risk. The external casing and the mounting bracket are made in non-magnetic stainless steel AISI 316. The inner resistance 230 V. 750 W is in nickel plated copper, with a particular position for easy inspection and tank cleaning. Following more advantages : - Horizontal or vertical mounting - 2 years total warranty and 5 years only the tank. - Insulated in polyurethane foam for less heat loss. No CFC used. Resistance (230 or 115 V/750 W) built in nickel plated copper for a long lasting - Special safety valve 4 bar with check valve to avoid water coming out for expansion. Easy winter draining. - Double safety thermostat, only manually adjustable. Thermostat pre-set to keep water temperature over 70°C to avoid bacterium forming.