If they're the same surface area, will it heat the space as effectively? The current normal radiator is about 60cm high and 100cm wide. If I got one that is 40cm wide by 150cm tall will it heat the space as effectively? (I'd like to move it to the opposite wall which is smaller due to doorways)
I'm a bit concerned that more of the heat would go straight up rather than heating the body of the room. (The current radiator works well in the room - its a hallway if that matters - but quite a wide one)