solar water system solar energy heater solar heati

solar water system solar energy heater solar heating low pressure solar water heater Features and advantage Vacuum tube:absorb efficiency≥93%,heat lose≤6%Freeze Protection:Vacuum can prevent freeze in cold climate,-20 degreeWorking pressure:2.0 bar for working,3.0 bar for testing,need water feeder or valve connect to existing goverment cold water!Safety:even have water in tube,but the glass is specifical for outdoor,25mm diameter hail will no damage!High efficency and temperature:no water in tube will arrive 250 degree.water inside arrive 95 degree!With copper coil with the tank, diameter: 14 mm Provide enough heat energy to storage tank,each square meter can save 6kwh energy every day!Economic solar collector and best heat efficiency. Guarantee and service: Economic heater for domestic Automatic Electrical Heating Element option1% spare parts are free!Five years quality warranty!Freeze protection:-25 !Wind stress:180km/h without damage!Hail resistance:25mm!All install document are free!