Electric Heater vs Central Heating — Cost Comparison

Should you use a portable electric heater or run your central heating? The answer depends on how many rooms you're heating, your energy rates, and how long you need the heat. Here's an honest cost comparison to help you decide.

How the Costs Work

Central heating (gas): Heats the whole house via a boiler and radiators. Gas is typically cheaper per unit of energy than electricity, but you're heating every room whether you use it or not.

Electric space heater: Heats one room directly. Electricity costs more per unit than gas, but you're only heating the space you're in.

Running Cost Comparison

Based on average U.S. energy prices (electricity: $0.13/kWh, gas: $0.012/cubic foot ≈ $1.10/therm):

When an Electric Heater Wins

An electric space heater is cheaper to run than central heating when:

• You only need to heat one room — running central heating for the whole house to warm one room wastes significant energy
• You need heat for a short period — electric heaters respond instantly; central heating takes 15–30 minutes to warm up
• You're supplementing central heating — lowering the central heating setpoint by 4–6°F and using a space heater in the room you're in can reduce overall costs
• You're in a poorly insulated room — a space heater warms you directly rather than trying to heat a leaky space

Top Electric Heater Picks

For bedrooms and small spaces, the WINHL Small Portable Ceramic Heater offers 1500W output, 70° oscillation, 5 modes, a 12-hour timer, and remote control — ideal for targeted room heating.

For larger living areas, the Lasko 1500W Ceramic Tower Heater provides widespread oscillation, a thermostat, timer, and remote — effective for open-plan spaces up to around 300 sq ft.

When Central Heating Wins

Central heating is more cost-effective when:

• You're heating multiple rooms simultaneously — the per-room cost of central heating drops as you heat more rooms
• You need all-day heating — a well-insulated home with an efficient boiler and smart thermostat is hard to beat for whole-home comfort
• Your home is well-insulated — central heating retains heat better in a well-sealed home
• You have a heat pump system — modern heat pumps can deliver 2–4 units of heat per unit of electricity, making them significantly cheaper than resistance electric heaters

The Hybrid Strategy (Best of Both)

The most cost-effective approach for most households:

1. Set central heating to a lower base temperature (e.g., 64°F / 18°C)
2. Use a space heater in the room you're actively using to top up to 68°F (20°C)
3. Use a smart thermostat to schedule central heating around your routine

This approach can reduce heating costs by 10–20% compared to running central heating at full temperature throughout the house all day.

Electric Heater Safety

• Always plug directly into a wall outlet — never use an extension cord
• Keep 3 feet of clearance around the heater
• Use a heater with tip-over protection and overheat shutoff
• Never leave running unattended for extended periods without a timer

Verdict

1–2 rooms, short periods: Electric space heater wins on cost and convenience.
Whole house, all day: Central heating wins, especially with gas.
Best overall: Combine both — lower central heating setpoint, space heater where you are.