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通过对3个类别5种品牌热水器供热水经济性比较，在使用寿命期内，最后算总帐，太阳能热水器，尤其是真空玻璃管式和热管式真空玻璃管太阳能热水器供热水，要远远好于其它形式的热水器。
Through the comparison of three categories of five brands of water heater hot water economy comparison, in the end of life, the total count, solar water heaters, especially vacuum glass tube and heat pipe vacuum glass solar water heaters to hot water Far better than other forms of water heaters.