SWH15 is a 5-star rated product with 5 star performance and best possible quality. It comes fitted with a superior polymer coated tank, convenient temperature settings and longer warranties. Why people prefer the Crompton water heater. It is because of advanced technology of superior glass line coating and magnesium anode for maximum protection against hard water and corrosion and longer life. Get the best quality that ensures, you have a water heater that works flawlessly in Indian water conditions. Longer warranties: 5 years warranty on inner tank 2 years comprehensive. Energy saving: Bee 5 star rating. One of the most energy efficient water heaters you can buy.