Big or small, gas or electric, the space heater you choose needs to be safe above all else. Fortunately, most feature a wide range of safety features. Accidental tip-over shutoff is one of the most important, as a space heater lying on its side or face can easily start a fire. When choosing your space heater, absolutely make sure that safety feature is present before you buy. Other safety features to look for are automatic overheat systems and power indicator lights so you'll know at a glance whether the unit is on or off. Regardless of what space heater you use, picking the right location for it is a critical safety consideration. Whether your space heater is large or small, be sure it is placed on a hard, level surface with plenty of clearance between it and furniture, walls and other objects.