Features: 1) Designed by the standard of getting heat in winter 2) Dong'ao heat-wasting restraining technology 3) Acceleration of hot water circulation TG technology 4) High temperature vacuum heat collecting tubes 5) The thickened heat preservation layer of high density 6) Large-angle specially adapted to high and cold areas 7) Stronger wind, snow, and hailstone resistant ability 8) More coordinate with the architectural environment 9) The hot water system fitting for families and work units in mass storage and large trend 10) Working with pressure