Space Heater Safety: 9 Places You Should Never Use One

Space heaters cause an estimated 1,700 house fires every year in the United States — most of them preventable. At Around the Town Heating & Cooling Inc., we see the aftermath of heating emergencies every winter. The safest approach is a well-maintained primary heating system, but when a space heater is part of the picture, knowing where not to use one can be life-saving.

Never Use a Space Heater in These Locations

1. On Carpet, Rugs, or Any Flammable Surface

Even heaters with tip-over protection can ignite nearby flammable materials. If a carpeted room is the only option, place the heater on a heatproof base that extends at least three inches around the unit on all sides.

2. Near Walls, Furniture, or Under Desks

Maintain a minimum three-foot clearance in all directions. Walls and furniture trap radiant heat and can ignite — especially with prolonged use. Never place a space heater under a desk where airflow is restricted.

3. Near Bedding, Curtains, or Soft Furnishings

Blankets, pillows, curtains, and clothing are highly flammable and can easily shift into the heat zone. Keep the three-foot safety perimeter clear of any soft materials — especially in bedrooms where items may fall from beds during the night.

4. In Rooms Accessible to Children or Pets

Young children and animals don’t recognize heat hazards. They may knock units over, drag flammable items nearby, or burn themselves on exposed heating elements. Use heaters only in areas they cannot access, and never leave a heater unattended around children or pets.

5. In Bathrooms or Laundry Rooms

Water and electricity are a dangerous combination. Standard space heaters are not rated for wet environments — the humidity in bathrooms and laundry rooms creates risk of electrical shock and component failure. There are dedicated bathroom-rated heaters, but they must be installed by a licensed electrician and mounted out of reach of water.

6. On a Shared Power Circuit With Multiple Appliances

Space heaters draw 1,000–1,500 watts — close to the capacity of a standard 15-amp household circuit. Running a heater alongside a microwave, toaster, or other high-draw appliance risks tripping the breaker or overheating wiring inside the walls.

7. Plugged Into an Extension Cord or Power Strip

Most extension cords and power strips are not rated to handle sustained high-wattage loads. The cord heats up and can melt or ignite. Always plug a space heater directly into a wall outlet — no exceptions.

8. Into an Old, Damaged, or Non-GFCI Outlet

Older outlets may have loose connections that cause arcing and overheating under load. A GFCI (ground fault circuit interrupter) outlet provides electrical fault protection. If your home has older wiring or outlets that feel warm to the touch, address the electrical issue before plugging in any high-draw appliance.

9. Using Fuel-Burning Heaters Indoors

Kerosene, propane, and other fuel-burning heaters produce carbon monoxide — a colorless, odorless gas that is fatal in enclosed spaces. Never use fuel-burning heaters indoors without proper venting. Install and test carbon monoxide detectors on every floor of your home.

The Safest Heating Solution: A Working HVAC System

Space heaters are a stopgap — not a substitute for a well-maintained heating system. If you’re relying on one because your furnace or boiler isn’t keeping up, that’s a sign your primary system needs attention.

Around the Town Heating & Cooling Inc. has served Chicago and the South Suburbs since 2004. We service all makes and models of furnaces and boilers with licensed, NATE-certified technicians, upfront pricing, and 24/7 emergency availability.

Call or text us at (312) 243-9896 to schedule a furnace inspection or repair — or request service online. Stay warm and stay safe this winter.