... 2.Antifreezing -40 degree 3.OEM provide Split Pressurized solar thermal system1,Size:58/1800,47/1500 2,CE,SRCC,Solar ... keymark 3,Lifetime:15 years 4,Delivery date:7-20 days.Specifications:Solar energy collector:Size: 47mm,1500mm ... , each system have manual instruction.4.Use copper pipe for transfer hot, more high efficient, and water more clear,because no ...