Evacuated tubes are connected to one another in a manifold. Water flows through the manifold and collects the heat from the top of the copper heat pipe. The solar tube is manufactured from very hard borosilicate glass and consists of two layers.
Evacuated tube solar collectors with internal adjustable collector surfaces allow this type of collector to be installed at angles ranging from 0º to 90º. The collectors are always pumped systems. The collector surfaces inside the evacuated tubes are set to the optimal angle during the installation.