Do Space Heaters Use a lot of Electricity?

Cold toes under your desk… a chilly bathroom first thing in the morning… sometimes, a space heater just feels like the perfect fix. And honestly, we get it. Who doesn’t want a quick way to warm things up?

But as electricians, we’ve seen what most homeowners don’t see—scorched outlets, overloaded circuits, and heaters plugged into old wiring that wasn’t built to handle the strain. Space heaters aren’t bad, but using them the wrong way can lead to big problems.

In this article, we’ll walk you through:

• How much electricity space heaters use (and what it means for your bill)
• The fire risks most people overlook
• Dangers like burns, shocks, and tripped breakers

Let's keep you warm and safe.

How Much Electricity Do Space Heaters Use?

If you’ve ever wondered whether space heaters use a lot of electricity… the answer is yes.
Most space heaters draw between 500 and 1,500 watts, depending on the model and settings. That might not sound like much—until you compare it to everyday appliances. A standard TV, for example, typically uses just 50 to 200 watts. That means a single space heater can use as much electricity as 7 or more TVs running at once.

According to EnergySage, running a space heater for several hours a day over a month can significantly increase your electric bill, sometimes by $30 to $100 or more, especially during colder months when you're tempted to keep it on longer.

And if you’re using multiple space heaters throughout your home? That cost—and the strain on your electrical system—can add up quickly.

If you're relying on space heaters to make up for cold spots or uneven heating, there may be a better long-term fix for your home and your wallet. From thermostat adjustments to simple electrical upgrades (like adding dedicated circuits, improving insulation around outlets, or installing baseboard heating), there are ways to stay warm without spiking your energy bill.

The Fire Risks of Space Heaters Most People Overlook

Space heaters may be small, but the fire risks that come with them are anything but.

One of the most common issues is overheating, especially when a heater is left unattended or runs for long periods of time without proper airflow. Many models can also tip over easily, and if that happens near flammable materials like curtains, bedding, or rugs, a house fire can ignite in seconds.

Another major concern is how much electricity space heaters demand. They pull a lot of power, and when plugged into extension cords or power strips, they can overload your circuits, especially if there are loose connections or outdated wiring. In older homes, this can lead to melted plugs, tripped breakers, or even electrical fires behind your walls.

So, how do you stay warm without worry?

Start by placing space heaters on flat, level surfaces—away from anything that could catch fire. Avoid using extension cords altogether, and always plug the heater directly into a wall outlet. Make sure your heater has safety features like automatic shut-off if it tips or overheats, and never leave it running when you’re not in the room.

If you find yourself relying on space heaters regularly, it may be time for a professional to check your home’s electrical system. Something as simple as adding a dedicated outlet or upgrading an overloaded circuit can make a big difference in both comfort and safety.

Space Heater Burns and Electrical Shocks

Space heaters aren’t just a fire risk—they can also cause serious injuries, especially for kids and pets. CPSC estimates that space heaters are associated with about 21,800 residential fires every year. About 300 people die each year in fires started by these heaters.

Most space heaters have exposed heating elements or hot surfaces that can reach 150 to 250 degrees Fahrenheit. That’s more than enough to cause a burn if someone accidentally brushes against it, knocks it over, or tries to move it while it’s still hot. Toddlers and pets are especially vulnerable, since they may not realize the danger until it’s too late.

And just like any electrical device, space heaters can pose a shock hazard if they’re used improperly. Frayed cords, loose plugs, or contact with water can all increase the risk, especially in bathrooms or basements where moisture levels tend to be higher.

Thankfully, avoiding these problems is simple with a few precautions:

• Keep space heaters out of high-traffic areas where they might get bumped or touched
• Use models with cool-touch exteriors and child-safe features
• Never use a space heater with a damaged cord or plug
• Always unplug the unit when not in use
• Avoid placing them in damp areas unless they’re rated for it

And if your outlets feel warm, you smell something burning, or you’ve noticed sparks when plugging in appliances, it’s time to have your wiring checked. These aren’t just space heater problems, they could be signs your electrical wiring is failing and deserve a closer look.

The Bottom Line on Space Heaters

Space heaters can feel like a quick, cozy fix, but they come with trade-offs most homeowners don’t think about.

They use a surprising amount of electricity, which can drive up your bill fast, especially if you’re running them for hours each day. And with that high power demand comes real safety concerns: fire risks, overheating, electrical shock, and painful burns are all far more common than they should be.

Whether you’re trying to save money or just take the chill out of the air, there are safer, more cost-efficient ways to stay comfortable. Sometimes, it’s about where and how you use a space heater. Other times, it’s about small adjustments that reduce your overall energy use without sacrificing warmth or convenience. If you are ready to have lower energy bills, then check out How to Lower Your Electric Bill: Simple Tips to Save Energy & Money.