Solar vacuum collector with copper thermal heat pipe. Overall dimensions of the collector, L - 1300 mm x W - 1750 mm x H - 1470 mm. Overall dimensions of the tank, D - 480 mm x V - 1550 mm x H - 1710 mm. The number of vacuum tubes depends on the specifications. tasks. Type of vacuum tubes Glass Coolant material Copper Absorber material Cu/Al/SS/N2 Size of vacuum tubes Length 1800 mm Ø – 58 mm. Solar Collector Efficiency 93% (Efficiency Coefficient) Base Frame Appearance Prefab Design