Using an electric space heater can be one of the most expensive ways to heat your home. In fact, electric heat can cost four times as much as natural gas! Check out this video of how fast your meter spins when using electric heat. If that isn’t scary enough, all space heaters carry a safety risk. There are some rules you have to follow. First of all, turn them off when not in the room or sleeping. Second, only buy a unit with a tip-over switch. But the most important rule, the rule you can never forget: No matter how much it runs, no matter how cold it gets, never touch the heating element in a space heater.