Sunrain all in one heat pump water heater is a very smart design to provide domestic hot water for the house. With all in one type and water tank inside, it is very easy for installation and convenient for users. Features & Benefits Parameter Easy installation with all in one type Higher water temperature output up to 75�°C With sterilization funcation Enamel water tank inside with long lifespan High density foam with good insulation Full automatically operation Reverse cycle defrost with 4-way valve 100% factory tested Top air in/out with duct,free of cool air Intelligent controller Simple operation, convenient life Enamel water tank Blue Shield special protection liner, thickness up to 2.0 mm, strong corrosion resistance; The high-density, ultra-thick, fluorine-free environmental insulation layer made by the heat insulation wall can effectively lock the heat.