I googled your question and came up with the following.
Yes you only have to plug them in and they are ready to work. The radiators are all equipped with there own thermostat and measure the temperature of the room. When you ask a certain temperature they will heat the room in a comfortable way, as they are real aluminium radiators, once the room is to the temperature level you feel comfortable about they stop to heat. There thermostat and temperature level is quiet accurate and easy in use. Do you know that the radiators can be installed within minutes and start to function directly! Also Calortec radiators have a 10 year factory guarantee on the radiator and 2 year guarantee on the electric controls!
Easy in use, easy to install and full comfort assured!
(THEY DO NOT STORE HEAT LIKE A STORAGE HEATER)
wirecutterman, December 2009