In domestic buildings, water is generally heated by an immersion type electric water heater, equipped with a thermostat as one unit, which is fitted at the bottom of the tank. Despite these systems are driven by electric energy, which is not favorable compared to direct solar water heaters, they are still widely used due to the practicality and low installation costs.

中文翻译：

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恒温器位置及其设定温度对家用电热水器性能的影响

在住宅建筑物中，水通常由浸没式电热水器加热，该电热水器配有恒温器作为一个单元，该恒温器安装在水箱的底部。尽管这些系统由电能驱动，这与直接太阳能热水器相比是不利的，但由于实用性和低安装成本，它们仍被广泛使用。