The Vitowell comfort Classic line equips you with a reliable and secure water heater.  Viessmann adopts the exclusive Ceratech Technology enamel coating formula to extend the durability of water tanks.  Acid corrosion and alkaline resistance, temperature and pressure resistance meet the latest German quality standards to assure long-lasting durability of the heater at its core.  A high-quality, water-resistant casing material provides maximum safety.