The A.O.Smith India Water Heating Private Limited has, through a press release, announced that its EWS water heater has earned 5-star energy rating from the Bureau of Energy Efficiency (BEE). The 5-star rating is accorded by BEE for energy efficient electrical appliances. In addition, the product is being re-launched as HSE-SDS with advanced features such as Blue Diamond glass lining, temperature control knob, and thermal cut-out, it said.