All KORALUX towel rail radiators, which are connected to a hot water heating system, can be supplemented with an electric heating body without a Z-KTT-XXXX integrated temperature regulator or with Z-KTTR-XXXX integrated temperature regulator. In doing so, a towel rail radiator is created for combined heating (hot water – electricity) and it can then be used at any time independently of operation of the heating system. The basic version of this electric heating body is connected to the fixed electricity mains by means of a supply cable into the mounting box. In the case of the electric heating body for combined heating without integrated temperature regulator, a modified supply can be used for connection to a mains socket. In this case it is however necessary to order accessories in relation to the required convenience of operation and economy of operation of the electric heating and to fit this to the supply cable.