The advantages of all-glass vacuum tube collector 

 Vacuum tube (1) using the new gradient - interference in the selective absorption coating and nano-coating technology, solar absorption up to 0.97, the thermal emission ratio is 0.05, have been close to the theoretical limit, creating the miracle of vacuum tube technology. 
 (2) the box with thick insulation, thermal insulation is 50mm thick. 
 (3) use of patented technology in the collector, collector for the back pipe emptying design, does not apply in winter heating cable insulation, security and stability, low energy consumption.