The design of digital automatic temperature control water-heater is introduced.

介绍了数字式自动控温热水器的设计思想。

In view of the limitation of safety and efficiency of current water-heater, the basic structure and principle of a supersonic-frequency induction water-heater are introduced.

针对目前热水器的安全，效率等局限性，本文介绍了一种超音频感应加热热水器的基本结构和原理。

Then open the “hot out” valve at the electric water heater and turn the breaker on.

然后我们关闭热水器的电力加热器的开关并将断路器打开。

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。

The solar water heater gained popularity at this time in Florida, California, and the Southwest.

在如今的佛罗里达、加利福尼亚以及西南地区，太阳能热水器大受欢迎。