Direct Heaters | Stiebel Eltron Room Heating You’d like your bathroom a little warmer in the morning? That’s one of the jobs a direct heater is best for. However, they are also an appealing option for heating spaces that are rarely used, or lack a heater of their own. For this additional comforting warmth, all you need is a power outlet. With minimal investment, appropriate appliances can create a pleasant atmosphere that you will soon not want to be without!