... for flat and incline roof. Reliable and economic. Solar collector:1.It is a device that absorbs ... into usable heat2.The water is normally absorbed by water, or a freeze resistant water mix, which can used ... .3.Special designed for the heat-pipe solar water heater systems ,it is easy to combine with ... ,1.8m2.Number of the thbes:15-363.Capacity:100L---500L4.Out tank shell: Stainless steel, thinckness:0 ...