Electric showers are a type of electric water heater that is designed to be installed in place of a standard shower. They are typically installed by a plumber, but an electrician may be needed if the installation includes rewiring or any other electrical work. The main components of an electric shower are the shower head, the body of the shower (containing the heating elements), and the pump. The pump draws cold water from the bottom of the bathtub or sink and circulates it upwards through the body of the shower and back down to send hot water out through the shower head. Some electric showers also include a built-in thermostat to provide temperature regulation.

You can install an electric shower yourself, but it is not recommended. If you are comfortable working with electricity and are familiar with the safety hazards, then you can go ahead and do it. However, if you are not comfortable working with electricity or are not familiar with the safety hazards, then it is best to have a professional electrician install it for you.