Answer: the resistors heat the heat transfer fluid which heats the walls of the radiator.
The operation of the oil-filled radiator is based on the same model as conventional central heating, which is very common. With the difference that it is about a mobile radiator, because it is assembled on casters and contains a fluid known as heat transfer which replaces water. When the radiator is on, the resistors heat the coolant, which in turn will heat the walls of the radiator. It thus diffuses a lasting, constant and homogeneous heat in the room. The oil bath radiator is considered to be the most powerful of the mobile electric radiators. Above all, it benefits from a low inertia, so it continues to heat for a moment once it is switched off. In return, it takes time before going up in temperature. You too, send us your brico question