[size=6]“short-lived” the reasons for solar water heaters[/size][size=4][/size][size=5]First, vacuum tubes[/size][size=6][/size] Vacuum tube solar water heater core components, solar water heaters are also the “heart.” It directly determines the quality of the entire water heater units use performance. The performance by the use of vacuum tubes and cleaning coating technology, coating, vacuum, seal and other craft and so on. However, some ultra-low-cost solar water heater vacuum tube used has the following shortcomings: the vacuum is low, only the quality of 1 / 100; tube remains a large number of impurities and water vapor, in the face becomes hot gas, vacuum reduced; low vacuum stable performance under the film is poor, two or three years of the intimal layer of the aging off, resulting in rapid attenuation of collector performance, and can not absorb enough heat.[size=5]Insulation Layer[/size] Daytime production of solar water heater hot water stored in the storage box, if the insulating layer of insulation is not good, overnight, rainy days can not be used, or difficult to use. Solar water heater insulation caused by poor performance is largely due to water heaters, insulation layer, insulating layer is good or bad determines the high and low temperature hot water and hot water volume of the number. A good insulating layer of imported raw materials, such as polyurethane, low thermal conductivity, high temperature; insulation temperature high-pressure process using automatic quantitative foaming, and high temperature aging treatment, heat preservation performance, high and stable and lasting. Some inferior materials, high thermal conductivity, foam is not uniform, the night the temperature can drop more than ten degrees, overcast and rainy days there will be no hot water experience. Some black-hearted enterprise, in order to reduce costs, even using self-made benzene board insulation effect a few months later plummeted, almost no insulation after a year or two.[size=5]Third, Liner[/size] Currently, most solar water heater manufacturers have said that stainless steel tanks Liner. Similarly, stainless steel, but stainless steel of chromium and nickel are quite different. Good solar water heater using high chromium high nickel stainless steel inner tank, ensuring Liner rugged, corrosion resistance strong; inferior Liner to use more low-grade stainless steel, basic non-nickel, corrosion-resistant performance is poor, and short service life.[size=1]Solar Water Heaters:[/size][size=1]www.solarhotwatersystem.net[/size][size=5]Installation And Service[/size] Requirements on the installation of solar water heaters is very high, professional installation is the foundation of its winter and easy to use and protection. Some brand-name companies to recruit migrant workers are often composed of four “guerrillas” and also without formal training in a hurry posts, these people do not understand both the design of piping, water heaters of the main fixed-professional knowledge, but do not understand the latter part of the upkeep and maintenance products, resulting in problems abound, a direct impact on solar water heaters “standard life expectancy.” For example, the mounting bracket for fixed water heater parts, big brands of multi-use steel wire, strong, corrosion-resistant, but some small manufacturers are using wire fixation, resulting in some areas experienced a heavy rain, hail and other inclement weather, there is no Shao fell to the ground with a burst of solar water heaters.