Sigma is the Greek technology leader for solar systems and hot water systems in the Middle East. Sigma’s plants are mainly used in hotels, hospitals, high rise apartments, villas and industrial facilities. Sigma combines all available energy sources such as gas, oil, electricity and renewable energy sources. Sigma develops and manufactures top quality products in Greece for hot water systems. Sigma also manufacture standard storage tanks from 150 to 1,000 litres, and special tanks with a capacity of up to 10,000 litres. Sigma manufacturing process provides automatic welding, robot welding and laser cutting. Sigma designs , develops and manufactures separate or turn on key systems of highest quality and efficiency , as a result of our unrivalled experience in over thousand installations in Europe, the Middle East, and North Africa, through their 35 years of history.