Tank Capacity Comes in 25, 35 & 50 litres Saves Energy up to 20% with Heat Elevator Technology Triple Safety System (Pressure Relief and Drain Valve, Thermostat Safety Cut-Out and Thermal Cut-Off) Stainless Steel Heater Tank for Rust Free Water CFC Free High Density Polyurethane Foam for Maximum Insulation Patented Mounting Ring Bracket 10 years leak proof warranty on inner tank. *terms & conditions Heat Elevator Technology Saves electricity consumption by 20% Heat Elevator is a patent pending magnetic technology that accelerates heat transfer in fluids to improve heat stratification Stainless Steel Heater Tank for Rust Free Water Premium quality Japanese grade stainless steel heater tank which ensures constantly clean water