One of the devices that I think are indispensable for everyday life is the water heater, because who doesn't enjoy a hot shower after a cold and heavy day? This device heats water almost instantaneously, using energy from various sources, depending on whether it is an electric or gas device, and is used for various tasks such as heating, bathing or washing, in the case of domestic use.
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In my case, I have one of the automatic gas type, which automatically turns on when I turn the water tap because it has batteries, which is more convenient than others in which you have to light the fire with matches or lighters so that it can work and heat the water. Although I do not know if it's my favorite technological device, I think it is a very innovative and highly recommended invention, as it saves having to heat the water in kettles and pots, every time you need to bathe or wash.
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