Features:
1) consisted of super conducting vacuum heat collecting tube and heater, heat preservation water tank, the tubes run under pressure.
2) The absorbing percentage of the glass vacuum collector is more than 94%.
3) In the sunny days of spring or autumn, each collecting tube could make the water up to 90 only in 2.5 hours.
 4) The water tank uses enamel as inner tank and polyurethane integral foaming as heat preservation material to improve the heat preservation ability.
5) And it makes the system be used as usual under minus 50.