1.commercial Air source heat pump water heater, 2. Use Special Compressor, 3. Safe, ... stable! 2,AISEE use Japanese electronic control technology.Only three to five enterprise can do it. 3,AISEE has ... to make effective heat exchanger to prevent limescale. 4,Unique three core technology, achieving top quality . Intelligent Fuzzy Defrost ... available ,OEM &ODM are available. EVI commercial heat pump