Storage water heaters of small volume are connected to a conventional power outlet and can be used to produce hot water in dining facilities, as well as in apartments and in the country. Compactness and installation easiness are advantages of this type of water storage devices. They can be mounted directly above or under the sink.
Small storage water heaters are 10-30 litre devices with advantages of water heating high speed and sufficient efficiency of power consumption. This is achieved thanks to the efficient insulation of the tank made of polystyrene foam.