Product Description ?Solar system--Split Pressurized Active Open Loop System is for climates where there is no risk of freezing.Recirculation freeze protection can be provided by the recirculation feature in the controller. an open loop water heating system provides many advantages. it is the simplest and typically least expensive active system to install. there is no heat exchanger, which allows efficient heat transfer directly to the water. the system operates at standard line pressure. it is simple to add capacity to the system if demand changes. the system integrates easily with existing system. ? Specifications: 1.Pressure hot water tank(NCSTI) 2.Heat pipe/U pipe?vacuum tube solar conllector 3.Wilo hot water pump(RS15/6) 4.Three sensors difierential controller 5.Stainless steel pressure storage tank 6.Air scoop and air vent 7.Electric booster:1.5kw 8.Magnetic anode 9.P/T valve 10.One way valve ?