A. Water wouldn't run in the Solar collectors tube,so the heat delivery efficiencywouldn't be affected.
B. Both for pressurized and non-pressurized one.
C.The whole system would run normally if some of vacuum tubes broke.
D. Thewhole system is connected without silica gel, so there is no problem ofaging.
E. The water is circulated with high efficiency by pumper.
F. Itcan be for huge project by parallel or serial connection.