There are details on all of the main main types of shower:
An electric shower's main advantage over other types of shower is its convenience.
Electric showers benefit from the fact that they provide instant hot water, independently of the central heating system. This means they can be fitted in any home, regardless of which type of heating system is in place, and can be used if the heating is switched off or is out of action.
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An electric shower only heats water as it is used so it can be quite economical, but if you have a tank full of hot water available at most times of the day, an electric shower will not save you any money (because you are effectively heating two lots of water).
Electric showers take mains pressure cold water and heat it up, as and when required. If you do not have mains water (as is the case in some remotely located houses) there are one or two showers that will work with low pressure water - check with the shower manufacturer for details.
Electric showers require a large cable to be run from the shower, back to the fuse box via a pull switch. Some redecoration might need to take place after installation depending on where the cable has had to be run. A qualified electrician should be used to install the shower as there are many new regulations that need to be met when installing an electric shower.
Electric showers are available in different kilowatt ratings - the higher the rating, the better the flow rate.
Over the years the ratings have increased to over 10kw giving significantly better showering performance than was previously available. However, even these top rated electric showers cannot provide anywhere near the flow rates offered by power showers, or even many mixer showers.
Features quite often seen on electric showers are phased shutdown, and temperature stabilisation.
Water left in the internal heating chamber, after someone has used the shower can become very hot, so phased shutdown is used to clear the chamber of water after the unit is switched off to prevent scalding.
Temperature stabilisation is used to regulate the water temperature in the event of someone using water elsewhere in the house whilst the electric shower is in use. Although not fully thermostatic these showers do offer a degree of protection from temperature fluctuations. If you want a guaranteed constant temperature you will need to opt for a fully thermostatic electric shower.
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