Space heaters can be expensive to run, costing between $0.10 to $0.50 per hour, depending on the model and electricity rates in your area.
Space heaters can be a cost-effective way to heat small areas, but their operating costs depend on wattage, usage patterns, and local electricity rates. Understanding these factors helps determine if a space heater makes financial sense for your situation.
How Much Does a Space Heater Cost to Run?
The operating cost of a space heater depends on three key factors:
- Wattage (typically 750W-1,500W for residential models)
- Hours of daily use
- Your local electricity rate (average is $0.13 per kWh nationally)
Daily and Monthly Cost Examples
| Wattage | Hourly Cost | 8-Hour Day | Monthly (21 work days) |
|---|---|---|---|
| 750W | $0.10 | $0.80 | $16.80 |
| 1,500W | $0.20 | $1.60 | $33.60 |
For comparison, central heating systems typically use 3,000-3,500 watts but heat entire homes more efficiently than multiple space heaters could.
Space Heater vs Central Heating Costs
While space heaters use less electricity than central heating systems, they’re only cost-effective when heating small, occupied spaces temporarily. According to Consumer Reports, space heaters make sense when:
- Heating a single room for a few hours
- Your central system uses expensive fuel (like electric resistance heat)
- You lower the thermostat while using the space heater
For whole-home heating, central systems are typically more efficient. Consider a built-in gas heater if you need supplemental heating in specific areas.
Types of Space Heaters and Efficiency
Different space heater technologies vary in efficiency and operating costs:
1. Ceramic Heaters
Most common residential type with 750W/1,500W settings. Good for small rooms.
2. Infrared Heaters
More efficient for direct personal heating rather than whole-room warmth.
3. Oil-Filled Radiators
Slower to heat but retain warmth longer after turning off. Good for bedrooms.
4. Propane Heaters
Portable option where electricity isn’t available. See our guide to indoor propane space heaters for safe models.
Tips to Reduce Space Heater Costs
- Only heat occupied rooms and turn off when leaving
- Use lower wattage settings when possible
- Improve room insulation to retain heat
- Position heater near seating areas rather than walls
- Combine with warm clothing and blankets
The U.S. Department of Energy recommends space heaters as supplemental heat sources only, never as primary heating for entire homes.
Safety Considerations
Beyond cost, safety is crucial when using space heaters:
- Never leave heaters unattended or run overnight
- Keep 3 feet clearance from flammable materials
- Plug directly into wall outlets (no extension cords)
- Choose models with automatic shut-off features
While space heaters can be expensive to run if used constantly, strategic use in small spaces can provide comfort without dramatically increasing energy bills. The key is balancing localized warmth with overall home heating efficiency.
