Left tubes are the absorber of the solar water heating unit. They soak up solar power converting it into heat for use in water home heating. Vacated tubes have currently been used for several years in Germany, Canada, China and also the UK. There are a number of types of vacated tubes in use in the solar sector. Completely Solar collectors utilize one of the most common “twin glass tube”. This kind of tube is chosen for its reliability, efficiency and reduced production cost.
Each vacated tube consists of 2 glass tubes made from incredibly solid borosilicate glass. The top of the two tubes are integrated with each other and also the air had in the room in between the two layers of glass is pumped out while exposing the tube to high temperature levels.