OASIS PREMIER ENERGY TECHNOLOGY Co., LT is a Sino-Canada joint venture(OPET), which is located in the sea port city Ningbo. OPET is the only porudction base authorized by Canada OPETECH INC in Asia, which is specialized in manufacturing air sourced heat pump water heatercommercial heat pump water heater system and swimming pool heating systems. OPET is leading the world in low temperature operation technology, refrigerant special additives, high and low temperature balance technology and heat...View More