Running an oil-filled radiator is generally cheaper than central heating, especially for small spaces, due to lower energy consumption and targeted heating efficiency.
When winter arrives, many homeowners face the dilemma of choosing between oil filled radiators and central heating. The decision often comes down to cost, efficiency, and comfort. This guide breaks down the key factors to help you make an informed choice.
How Oil Filled Radiators Work
Oil filled radiators use electricity to heat diathermic oil inside sealed metal columns. The oil retains heat well, allowing the unit to continue warming a room even after turning off. These radiators are portable and ideal for single-room heating.
Pros of Oil Filled Radiators
- Excellent heat retention
- Silent operation
- No dry air effect
- Portable for room-to-room use
Cons of Oil Filled Radiators
- Slower to heat up initially
- Higher electricity costs compared to gas
- Limited to single-room heating
Central Heating Systems Explained
Central heating systems use a boiler to heat water that circulates through radiators throughout your home. Most UK homes use gas-powered combi boilers, though some use oil or electric systems.
Pros of Central Heating
- Heats entire home evenly
- Generally cheaper to run (with gas)
- Can be zoned for efficiency
- Maintains consistent temperatures
Cons of Central Heating
- Higher upfront installation costs
- Requires regular maintenance
- Less efficient for single-room use
- Heat loss through pipes
Cost Comparison: Oil Radiator vs Central Heating
The cost difference depends on several factors including room size, insulation, and energy rates. Here’s a breakdown based on typical UK energy prices:
| Heating Method | Power | Cost per kWh | Hourly Cost |
|---|---|---|---|
| Oil Filled Radiator (1.5kW) | 1.5kW | 7.5p (off-peak) – 34p (standard) | 11p – 51p |
| Gas Central Heating | 7.2kW (average) | 10.3p | 74p |
For single-room heating, an oil radiator on off-peak electricity can be cheaper. However, central heating becomes more cost-effective when heating multiple rooms.
Real-World Usage Scenarios
Single Room Heating
For a 15m² room used 4 hours daily:
- Oil radiator: 6kWh at 7.5p = 45p/day
- Central heating (one radiator): ~2kWh at 10.3p = 21p/day
Whole House Heating
For a 3-bedroom house heated 6 hours daily:
- Central heating: ~15kWh at 10.3p = £1.55/day
- Multiple oil radiators: ~30kWh at 34p = £10.20/day
Energy Efficiency Considerations
While gas central heating is generally more efficient for whole-house heating, oil radiators can be more efficient for targeted heating:
- Modern condensing boilers achieve 90-94% efficiency
- Electric heaters are 100% efficient at point of use
- Heat loss in pipework reduces central heating efficiency
For those with solar panels or off-peak electricity tariffs, oil radiators can become more cost-competitive.
Tips for Maximizing Efficiency
For Oil Radiators
- Use thermostat control to maintain temperature
- Position away from drafts and furniture
- Clean fins regularly for optimal heat transfer
- Consider models with timers and eco modes
For Central Heating
- Install thermostatic radiator valves (TRVs)
- Bleed radiators regularly
- Use a programmable thermostat
- Insulate pipes and upgrade boiler if old
Alternative Heating Options
For those seeking other efficient heating solutions, consider:
- Indoor propane heaters for temporary use
- Infrared panels for spot heating
- Underfloor heating for consistent warmth
- Heat pumps for whole-home efficiency
Environmental Impact
The carbon footprint of your heating depends on your energy source:
- Gas produces about 184g CO2/kWh
- UK grid electricity averages 193g CO2/kWh
- Renewable electricity has near-zero emissions
According to the U.S. Department of Energy, space heaters can reduce energy use when heating small spaces for short periods.
Making the Right Choice for Your Home
Consider these factors when deciding:
- How many rooms need heating?
- What are your electricity and gas rates?
- Do you have off-peak electricity tariffs?
- How well insulated is your home?
- What’s your typical daily routine?
For most households, a combination approach works best – using central heating for whole-home warmth and oil radiators for supplemental heating in frequently used rooms.
