1) Built-in “U” metal runner, medium heat exchange, no water in the vacuum tube, so there is no scale in the tube, not afraid of freezing tube, explosion tube 2) no water in the vacuum tube, avoiding the risk of water leakage caused by its rupture 3) Due to the small amount of medium required for operation, the system can start quickly 4) Using heat-conducting aluminum wings with extremely high heat transfer efficiency, fast heat transfer speed 5) The system can be operated under pressure 6) Fully enclosed metal copper runner , corrosion resistance, no leakage, long service life 7) New three-level leak detection technology to ensure reliable operation of the system 8) Flexible size specifications and optimized design to meet the requirements of solar energy and building integration