Fan Heater Vs Oil-Filled Radiator Cost
Assumptions: Both are electric resistance heaters. Cost is based on wattage, hours and tariff.
| Scenario | Fan heater | Oil-filled radiator | Likely better choice |
|---|---|---|---|
| 2kW for 1 hour | 49p | 49p | Same cost |
| Fast warm-up | Strong | Slower | Fan heater |
| Retained warmth | Low | Better | Oil-filled radiator |
Cost comparison
Electric resistance heating converts electricity into heat at broadly the same efficiency.
When each option wins
The practical difference is comfort pattern: fan heaters heat air quickly, oil-filled radiators release heat more gradually.
What can change the result
Thermostat behaviour can change total run time, which changes cost.
FAQs
Which is cheaper per hour?
At the same wattage, neither.
Why do people say oil radiators are cheaper?
They may cycle differently or feel warmer after switching off, but paid energy is still based on kWh.
Which heats faster?
Fan heaters usually warm the air faster.
Which is safer?
Follow manufacturer guidance; both need clear space and correct use.
Last reviewed 3 May 2026. Source: Ofgem energy price cap. Figures are estimates. Actual prices vary by region, supplier, tariff, payment method and meter type.