Found in 2001,Dongguan Keyang Energy-saving Equipment Technology Co.,Ltd is a large-scale professional manufacturer of heat pump water heater in China .we are the first to research and develop high-efficient ,energy-saving and environment-protection heat pump hot water facility ,we set up specialized research institution and we have many famous experts who are engaged in the research and development of the heat pump products.Our heat pump water heater have such merits as energy-saving ...