Heatrae Sadia is widely recognised as a UK leader in the manufacture of hot water and unvented systems. With a comprehensive water heater range, Heatrae Sadia can offer customers modern, elegant designs which set new standards in performance and usability. Heatrae Sadia water heaters are all fitted with combined thermostat and safety cut-outs to provide safety against boiling available in standard copper, superloy and titanium.