Product Description : 1. Stronger heat collection: The efficiency of heat collection of single pipe increase 1 time. 2. Scientific principle: Heat collector and water storage tank are separated. The heat collector is made from metallic heat-collection pipes and can collect solar energy. 3. Simple operation: It is not necessary to keep watch and can operate all the year around. 4. Intelligent control: The system is equipped with computer automatic procedure and electric heating system to supplement heat. 5. Wide application: The whole heat collection project can meet not only the requirement of hot water in all fields but also can be used for many other fields such as warming, industrial heating, etc. Heat pipe tube features: 1. Degree of Vacuum: >5*10-3 Pa 2. Coating: Aluminium Nitride 3. Absorption coefficient: >0.93 4. Emissivity: <0.08 5. Starting temperature: <25 C 6. Max.temperature: 250 C 7. Freeze-proof: -50 C 8. Service life: >15 years 9. Wind resistance: 30m/s(grade 11) 10. Hail proof: 35mm 11. Glass material: concentrated borosilicate glass 12. Absorber plate: copper profile 13. Size of single tube: (mm) 47*1500 14. Weight of single tube: 1.5kg 15. Size of condenser end: (mm) 14?0 16. Heating-up coefficient: >95%