The cheapest type of heater to run is typically a heat pump, as it efficiently transfers heat and can significantly lower energy costs compared to traditional heaters.
With energy prices rising, finding the most cost-effective heater is crucial. This guide compares running costs of popular heater types, helping you save money while staying warm.
How We Calculate Heater Running Costs
All calculations use the UK electricity rate of 27.03p/kWh (April 2025). The formula is simple:
- Convert watts to kW (1500W = 1.5kW)
- Multiply by hours used
- Multiply by electricity rate
| Heater Type | Typical Wattage | Hourly Cost |
|---|---|---|
| Infrared | 600-1200W | 16.22p-32.44p |
| Halogen | 1200W | 32.44p |
| Oil-filled | 1500W | 40.55p |
| Convector | 2000W | 54.06p |
| Fan | 2000W | 54.06p |
Cheapest Heater Options Ranked
1. Infrared Heaters (Most Efficient)
Infrared heaters top our list with the lowest running costs. They work by directly warming objects and people rather than the air. This makes them 40% more efficient than conventional heaters according to US Department of Energy studies.
Key benefits:
- Instant heat (no warm-up time)
- Silent operation
- Maintains heat even when turned off
For outdoor use, consider infrared patio heaters which provide targeted warmth.
2. Halogen Heaters
Halogen heaters use quartz tubes to produce radiant heat. While slightly more expensive to run than infrared, they’re excellent for spot heating.
Best uses:
- Home offices
- Workshops
- Garages
3. Oil-Filled Radiators
These provide long-lasting warmth through thermodynamic oil. Though slower to heat up, they continue radiating heat after being turned off.
Ideal for:
- Bedrooms
- Living rooms
- Spaces needing consistent warmth
Higher-Cost Options
Convector Heaters
Convectors circulate warm air through natural convection. While effective for whole-room heating, they consume more power.
Fan Heaters
Fan heaters provide quick heat but are noisy and expensive to run. They’re best for short-term use in small spaces.
Smart Heating Tips to Reduce Costs
Use Thermostats Effectively
Programmable thermostats can cut heating bills by 10% according to Energy Saving Trust data. Many modern heaters like app-controlled models include this feature.
Zone Heating Strategy
Only heat occupied rooms. This approach can save 20-30% compared to whole-house heating.
Maintain Your Heater
Regular cleaning and maintenance ensures peak efficiency. For complex systems like pool heaters, professional servicing may be needed.
Long-Term Cost Considerations
While infrared heaters have the lowest running costs, oil-filled radiators may be more economical for all-day use due to their heat retention. The most cost-effective choice depends on your specific heating needs and usage patterns.
