Solatube sun professional solar system design, Web site: http://www.bjsola.com 
 A product that is most common for domestic solar water heater market, commonly used in domestic solar water heater products. The solar collector using all-glass vacuum tube collectors, water tank, open tank SUS304 stainless steel liner, insulation is a polyurethane foam insulation, sunny days, solar radiation energy through the natural cycle of the collector heat gradually to collect water tank rainy days the water temperature is not enough, the built-in electric heating system through the tank is heated to the temperature setting. Solatube sun professional solar system design, Web site: http://www.bjsola.com 

 , Music to enjoy the advantages of vacuum tube solar water heater: 

 Low installation costs. 

 Simple structure, easy maintenance. 
 Solatube sun professional solar system design, Web site: http://www.bjsola.com 
 Fun in the shortcomings of the vacuum tube solar water heater: 

 Tank round, installed in the roof is more abrupt, not very good integration with the building. 

 Open water tank, hot water the water pressure from the water tank and water points gap by gravity water, water pressure can not match the municipal water pressure (3-6 kg, a gap of 30-60 m), leading to the water when the water is not good tune the peaks and valleys low, easy to burn; when the drop is less than 7 meters, water pressure, water requirements reach comfortable. 
 By adding a booster pump, but there will be noise problems, but also increase the point of failure and energy consumption. 
 Solatube sun professional solar system design, Web site: http://www.bjsola.com 
 Water use water, due to the lower part of the vacuum tube in the tank can not be completely all the water emptying the hot water after a long time cooking, easy to produce nitrite, and bacteria, not suitable for drinking (vegetables, washing dishes, etc.). 
 Solatube sun professional solar system design, Web site: http://www.bjsola.com 
 Solar collectors for the all-glass structure, easy to run the water to rupture of the external reasons. 

 Other heat source and the interior is not easy to access, general gas water heater, electric water heater to run for the closed pressure, non-pressure systems and pressure systems are not well compatible. 

 4, suitable for people 

 Place in the villages and small towns, hot water, do not ask or family.