Thanks to their special thermal slots (DL world-wide patent), elements both keep the surface temperature within the values set by European Safety Standards, and help warm air convective movement, thus combining safety with quicker heating to maximum.These heaters are equipped with fan, which can be activated separately or together with the traditional heating element, to increase the total heating power of the radiator, and to select the most comfortable temperature in any room.Pre-assembled castors for an easy and practical transport of the appliance from one room to another.