Every winter the space heaters come out of the closet. One ends up in the home office. One goes in the cold bedroom over the garage. And there’s always one under a desk, because somebody’s feet are freezing.
Most of the time nothing bad happens. But a space heater is a small appliance that runs hot for hours, usually near fabric and paper, and the habits around it matter a lot more than the brand on the box.
Where you put it
On the floor, on a hard, level surface. Not on a dresser or a nightstand, and definitely not balanced on a stack of books.
Give it room. Most fire safety groups use three feet as the rule, on every side. That means away from the bed, the couch, the curtains, the laundry pile and the paper that collects under every desk.
Keep it out of walkways too. A cord across a doorway is a trip waiting to happen, and a tipped heater is a bad combination with carpet.
What you plug it into
The wall. A space heater pulls a lot of power, and a thin extension cord or a cheap power strip can overheat under that kind of load.
After it’s been running a while, feel the cord and plug. Warm is normal. Hot isn’t. If the plug or the outlet cover feels hot, stop using it and get it checked out.
If something does go wrong
A heater fire can start small and still leave a huge mess. Smoke and soot travel well past the room where it started, and then there’s the water from putting it out. Cleanup is almost never just replacing a rug. If you’re curious how that work actually goes, from boarding up to rebuilding, this step-by-step look walks through how a restoration crew handles it.
Hopefully you never need it.
When to turn it off
When you leave the room. Before you go to sleep. A heater humming all night next to a bed is exactly the setup fire departments warn against.
If you’re shopping for a new one, look for a tip-over switch and overheat protection. Both shut the heater off on their own when something goes wrong.
What not to heat with
Not the oven, and not the stove. Not a camping or outdoor heater brought inside. And don’t drape wet clothes or boots over a space heater to dry them, as tempting as it is in January.
What the utility says
CenterPoint Energy keeps a short list of space heater tips. Pick a heater approved by a testing lab like Underwriters Laboratories (UL), and look for that label on it. Read the instructions. Keep it a safe distance from furniture and drapes. Stop using it if the cord gets hot, avoid extension cords and run it on the floor only, never on a countertop or furniture. The utility also warns never to use a kitchen stove or oven to heat the house.
None of this costs a dime. Floor, wall outlet, three feet of space, off when you leave. Do those four things and you’ve cut out most of the ways a space heater turns into a fire.