Situation: I am about to open the door of bathroom stall to use the shower because I am filthy.
Alternative situations: I just came out of the toilet stall and was about to walk around the door of the bathroom stall to turn the radiator in front of the stall. I am leaving the bathroom stall through the door in front of the radiator.
Question: Where should I reach if I am feeling too cold and want to turn the temperature up?