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 ;