Oil-filled radiator vs fan heater
Side by side, with running costs at the current price cap.
Per hour at the same wattage, they cost exactly the same to run: every electric heater is 100% efficient. At 26.3p/kWh, 2kW is about 53p an hour. Fan and ceramic heaters win for quick bursts in a small room. Oil-filled radiators win for all-evening heat, because they're silent, even and keep radiating after the thermostat cuts out.
Oil-filled radiator vs Fan / ceramic heater at a glance
| Oil-filled radiator | Fan / ceramic heater | |
|---|---|---|
| Running cost per hour | Same per kW (2kW ≈ 53p) | Same per kW (1.5kW ≈ 39p) |
| Warm-up | Slow (15–30 min) | Fast (minutes) |
| Noise | Silent | Fan noise |
| Heat feel | Even, lingering | Direct, stops when off |
| Best for | Living rooms, all-evening use | Quick bursts, small rooms |
| Portability | Heavy | Light |
Choose oil-filled radiator if…
- You'll heat a room for hours at a time
- You want silence (bedroom, TV room)
- You like steady, even warmth
Choose fan / ceramic heater if…
- You need heat fast for 20–30 minutes
- The room is small
- You'll move it between rooms
Our picks: oil-filled radiator
De'Longhi Dragon 4 2kW oil-filled radiator
De'Longhi's long-running Dragon design: fins shaped to push warm air up and out faster than a standard radiator, with a thermostat and timer. The premium pick for a living room.
£129
Russell Hobbs 2kW digital oil-filled radiator
Nine fins, digital thermostat and a budget price. The sensible all-rounder for a medium room.
£52.99
Dimplex ECR20TIE oil-free radiator
Oil-free heating element that warms up faster and weighs less than an oil-filled unit, with a digital thermostat and 24/7 timer from a long-established British heating brand.
£98.89Our picks: fan / ceramic heater
Dreo 1500W ceramic heater
A compact ceramic fan heater with thermostat, tip-over and overheat protection. Heats a small room in minutes, but costs about 39p an hour on full.
£39.99
Amazon Basics 1800W ceramic heater
About as cheap as a safe, thermostatic ceramic heater gets. Best for quick bursts of heat rather than all-evening use.
£14.62Frequently asked questions
Which is cheaper to run, an oil radiator or a fan heater?
At the same wattage they cost exactly the same per hour. The difference is how long each needs to run to keep you comfortable.
Is an oil-filled radiator safer than a fan heater?
Both are safe when used as directed. Oil radiators have no exposed elements; fan heaters should have tip-over and overheat cut-offs. Never cover either.
Related
How we choose: we don’t lab-test products. Picks are based on published specifications, wattage and running-cost maths, brand track record and UK availability. Running costs use the Ofgem price cap for October–December 2026 (26.3p/kWh, electricity VAT removed). Prices on the buttons update hourly from Amazon UK. About Winter Ready.