An electric radiator comprising: at least one profile made of aluminium or alloys thereof, shaped in an elongated form; said at least one profile having a hollow central part delimited by a surface; an electric resistance positioned in said hollow central part; characterized in that said at least one profile is an extruded profile; said electric resistance is an insulated electric resistance having a surface load ranging from 0.6 to 1 W/cm2; the interspace which is created between the resistance and said hollow central part has a width ranging from 0.1 to 0.33 mm, more preferably from 0.1 to 0.15 mm.