A portable electric space heater can make a cold bedroom, office or family room more comfortable, but it concentrates a lot of heat and electrical load in one small appliance. Used carefully, it can provide temporary supplemental warmth. Used too close to furniture, through the wrong cord or while unattended, it can become a fire or shock hazard.
The short answer
Yes, a certified portable electric space heater can be used safely for supplemental heat when you follow the manufacturer’s instructions and basic fire-safety rules. It should not be used as an unattended or overnight heat source, and it should not become a permanent substitute for correcting a room that the home’s heating system cannot keep comfortable.
This guide covers plug-in electric heaters intended for indoor use. Do not bring an outdoor fuel-burning heater, barbecue or generator indoors for heat.
Choose a heater approved for use in Canada
Health Canada says electrical products that plug into an outlet must meet Canadian safety standards and carry a certification mark from an accredited body. Look on the heater and packaging for a recognized Canadian approval mark, such as CSA, cUL or cETL. Do not rely only on a marketplace listing or an unfamiliar logo.
- Choose a model designed for indoor household use.
- Look for tip-over and overheat shutoff features.
- Read the manual and confirm the required clearances before using it.
- Do not use a heater with a damaged cord, loose plug, cracked housing or missing safety label.
Keep at least one metre of clear space
Health Canada and Ontario’s Electrical Safety Authority advise keeping portable heaters at least one metre—or about three feet—from combustible materials. That includes curtains, bedding, clothing, upholstered furniture, paper, boxes and rugs.
Place the heater on a stable, level surface where it cannot be knocked over. Keep it out of doorways and walking paths, and do not place anything on top of it. Follow the manufacturer’s instructions about whether the model belongs on the floor or another specified surface.
Plug it directly into a wall outlet
Never connect a portable electric heater to an extension cord or power bar. Health Canada and ESA both warn against this because the additional connection can overheat under the heater’s electrical load.
- Insert the plug fully into a wall outlet.
- Do not use an adapter or remove the grounding prong.
- Do not run the cord under a rug, carpet, furniture or through a doorway.
- Avoid loading the same outlet with other high-demand appliances.
If the outlet or plug becomes hot, discoloured, loose, noisy or gives off a burning smell, turn the heater off and unplug it only if you can do so safely. Stop using that heater and outlet. Do not replace the plug, open the heater or attempt electrical repairs yourself; have the problem assessed by a qualified electrical professional.
Turn it off when you leave or sleep
A space heater needs supervision. Turn it off and unplug it before leaving the room for an extended period, leaving the home or going to sleep. King Fire and Emergency Services also advises unplugging space heaters when a home is left for vacation.
Keep children and pets away from the heater and cord. Never use a space heater to dry clothing, towels, footwear or bedding, and keep it away from sinks, tubs and other water sources unless the manufacturer specifically identifies an approved application.
A space heater may be hiding a heating problem
If one room in a Schomberg home regularly needs supplemental heat while the rest of the house is comfortable, the heater is treating the symptom rather than the cause. Common possibilities include a blocked supply register, obstructed return path, loaded furnace filter, duct issue, air leakage, inadequate insulation or a heating system that needs assessment.
Start with the safe checks in our guide, One Room Is Cold While the Rest of the House Is Warm. Keep registers and return grilles open, use the correct filter and record when the room feels cold. Do not adjust internal dampers, fan speeds, wiring or gas components.
Stop using the heater if you notice these warning signs
- A hot, loose or discoloured plug or outlet
- A damaged, frayed or cracked power cord
- Repeated breaker trips
- Burning, melting or electrical odours
- Sparking, buzzing or crackling
- A tip-over or overheat shutoff that does not work as described
If you see smoke or fire, leave the area and call 911 from a safe location. Do not re-energize a damaged heater or outlet.
When to call for heating service
Arrange an HVAC assessment when the central heating system cannot maintain the thermostat setting, airflow is weak, rooms remain uneven despite open registers, the furnace short-cycles or the system develops new noises or odours. A persistent cold room is more effectively addressed by finding the cause than by depending on a portable heater every day.
For help with a cold room or heating-system problem, review our heating service options and call Schomberg Heating & Cooling at (905) 939-2350. For time-sensitive service, call rather than relying on the website form.