Changsha Fukai Energy Company has 10 years experience in design, sales and installation of hot water industry. Changsha Solar Water Heater Manager can judge from the following eight aspects based on years of experience and purchase:
　　 1. Pay attention to the volume of the water heater and the amount of hot water when purchasing. This is not a concept (especially for side water). Some products have a large volume but the amount of hot water available is very small. You can't listen to the number reported by the salesperson. You can calculate the actual amount of hot water according to the following formula: the amount of hot water = (the bottom of the inlet and outlet to the bottom of the overflow) End length ÷ 2 ) 2 × 3.14 × (water tank length - 2 × insulation thickness).
2 , carefully observe the coating on the glass tube inside the vacuum tube, this is called the sun selective absorption coating, due to different manufacturing processes of different manufacturers, the color of the coating will be different, the same batch of glass tube may have a slight difference in color, However, it belongs to the normal range, the color of the coating is uniform, the film filter layer has no scratches, no peeling or falling off, and there is no stone or nodule on the glass. The support member supporting the inner glass is placed at the end and is not loose.
                              Changsha Fukai Solar Water Heater
　　 3 , the bracket design of household solar water heaters should be reasonable, should have sufficient strength, rigidity and corrosion resistance. Should pay attention to not only pay attention to the aesthetics of the bracket but also observe: the corrosion resistance of the bracket material selection; whether the bracket design has wind resistance, the smaller the wind resistance area is better; the material and strength of all the cross support points of the bracket.
4. Note that the pipe is not as thick as possible. When it is too thick and too long, the amount of ineffective water in the pipe increases. The amount of heat radiated outside at night will be very large, and it will be slow to enter the working state the next day. The diameter of the national standard tube is 47 mm, which is more scientific.
　 5 , the purchase should also take into account the number of permanent residents in the home to determine the size of the domestic solar water heaters purchased, generally 40-70 liters per person of hot water is appropriate.
　 6. Purchase other related accessories, such as automatic water shutoff device, water temperature and water level display, etc. The selection of these devices should be cautious. Some functions seem advanced, but they are used in hot water, the reliability is not high, and the time is long. Something went wrong.
　 7. The inner tank of the solar water heater can not be repaired once it is rusted. Consumers must pay attention to the materials and welding process of the inner tank, and the difference in cost and quality is very large.
　 8 , it is best to choose a big brand, choose Changsha solar water heater can not only look at the price, but also depends on the brand, the big brand after-sales service is more secure.
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