The energy efficiency of a water heater is measured in energy Factor or (ef). The larger the number of ef, the more efficient the water heater is.
热水器能效由能量因数或(EF)来测定,EF值越大,热水器的能效就越高。
For even greater efficiency consider buying a tankless water heater. Tankless water heaters only heat water when it is needed, instead of keeping a reserve of water at a constant temperature.
购买无水箱热水器(电热水器)是更加节能的做法,电热水器只在需要的时候对水进行加热,而不会对保存在水箱内的水加热保温。
This paper introduces a new type of solar water-heater, which works with direct-circulate compounded form. It can raise heat efficiency.
介绍了一种全新的太阳能热水器,采用直流—循环复合工作方式,提高了效率。
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