MasterSOL's boiler room boilers are internally protected against corrosion by the method of Direct Glass liquid enamel baked at 850 degrees Celsius, 400 micron thick, with a mixture of inorganic silicates without chemical additives (according to DIN 4753 Teil 3 & 6), for a completely hygienic water and excellent resistance to time. Having full adhesion of the glass to the steel, it follows the contractions and expansions of the metal. They are ideal for home and professional use and are made of quality, ecological materials for durability over time. Manufactured according to DIN 4753 and EN 12897 specifications, tested according to international hygiene standards. They are placed vertically and have places for recirculation and for an immersion thermometer. They also have a cleaning flange. Their insulation is made of polyurethane and its injection is done with an automatic machine of modern new generation technology with the aim of achieving the excellent density of the material. Electrical resistance (on request): 4 kW Corrosion protection: Magnesium anode