According to the U.S. Consumer Product Safety Commission, more than 1,700 residential fires every year are linked to space heaters. Here in the Ozarks, where older homes and vacation properties often struggle with cold spots, space heaters seem like an obvious solution. But beyond safety concerns, we know a lot of people want to know: Are space heaters saving me money, or making my furnace work harder? The answer depends entirely on how you’re using them.
When Space Heaters Actually Make Sense
Space heaters aren’t the enemy. Used correctly, they can be smart. Here’s when they work in your favor:
For targeted heating in a single room. If you’re spending most of your time in one space, a space heater lets you keep that room comfortable without heating the entire house. This can genuinely reduce heating costs.
In rooms your furnace struggles to heat. Some homes have cold spots. A space heater can address this without forcing your furnace to overheat the rest of your house.
For short-term use. Running a space heater for a few hours is reasonable. Problems start when people leave them on all day or overnight.
When Space Heaters Work Against Your Furnace
Here’s where things get tricky. Many homeowners unknowingly use space heaters in ways that increase costs and strain their HVAC systems:
Running multiple space heaters at once. If you’re using space heaters in several rooms to avoid running your furnace, you’re likely spending more on electricity. A typical 1,500-watt space heater running eight hours a day can easily cost you $60 or more per month. Multiply that by multiple heaters, and any savings you’d hope for disappear fast.
Using them to compensate for HVAC problems. If your furnace isn’t keeping your home comfortable, space heaters are a band-aid. Issues like ductwork leaks, poor insulation, or a struggling furnace need to be addressed; otherwise, you’re just masking the problem and paying more.
Leaving them running continuously. Space heaters are designed for supplemental heating. Running them all day creates a fire hazard and, as we said above, drives up electricity costs.
How to Use Space Heaters Without Hurting Your Wallet (or Your Furnace)
If you’re going to use a space heater, do it strategically:
- Lower your whole-house thermostat by a few degrees and use the space heater only in the room you’re occupying. This is where you’ll see actual savings on your energy bill.
- Choose the right size heater for the space. A 1,500-watt heater is overkill for a small bathroom but underpowered for a large living room. Proper sizing matters for both efficiency and safety.
- Never leave them unattended or running while you sleep. Safety aside, you’re wasting money heating a room you’re not even in.
- Plug directly into a wall outlet, not an extension cord or power strip. This prevents electrical fires and ensures safe operation.
- If you’re relying on space heaters regularly, it’s time to call a professional. There’s likely an underlying issue with your heating system that needs attention.
Space heaters can be helpful tools when used strategically for targeted, short-term heating. But if you find yourself depending on them just to stay comfortable, that’s your home telling you something needs fixing. Addressing the root cause will always be cheaper and safer than running space heaters indefinitely.
If you have any questions about your HVAC system, please get in touch with us today.