Tesy Electric Unvented Hot Water Cylinder with highly efficient heat exchanger is a smart solution for providing hot water to several points of use at any time. The water heaters have been developed to meet the highest European quality and safety standards. The product is equipped with specially developed technology called Insutech, which reduces heat loss by 16% compared to similar equivalent products. The Tesy cylinders incorporate a ceramic glass coating to ensure corrosion resistance and to enhance the life of the product.