How many watts is the WellHeater, what does an hour of warmth cost – and can it really help cut your heating bills? Here you’ll find the specs, honest worked examples and a calculator for your own electricity rate – whether you pay in pence, cents or euro cents.
- According to the product graphic, the WellHeater is rated at 800 watts.
- At full power and 25p/¢ per kWh it costs at most about £0.20 per hour.
- In low mode (400 W) it costs half that – about £0.10 per hour.
- The thermostat cycles the heater – real-world use is usually lower.
- The biggest saving comes from zone heating: only heat the room you’re using.
How many watts is the WellHeater?
The WellHeater is rated at 800 watts. That’s far less than many standard fan heaters, which run at 2,000 watts in the UK and Europe or 1,500 watts in North America. Less power means less electricity per hour – with a heat output designed for small rooms of up to about 12 m² (130 sq ft).
According to the manufacturer’s graphics, the WellHeater also has two heat modes: high mode at 800 W with strong airflow for instant heat, and low mode at 400 W with gentler airflow for gradual warming. Low mode halves the running cost – ideal for keeping an already warm room comfortable, or for overnight use in the bedroom with the timer set.
How much does a space heater cost to run?
The formula is simple: power in kW × hours of use × electricity rate. At 0.8 kW and an electricity rate of 25p/¢ per kWh, running continuously at full power gives you:
| Running time | Consumption | Cost (25p/¢ per kWh) |
|---|---|---|
| 15 minutes | 0.2 kWh | £0.05 |
| 30 minutes | 0.4 kWh | £0.10 |
| 1 hour | 0.8 kWh | £0.20 |
| 3 hours | 2.4 kWh | £0.60 |
| 8 hours | 6.4 kWh | £1.60 |
In low mode (400 W) every figure halves: one hour uses 0.4 kWh, about £0.10; eight hours come to about £0.80.
What you pay per kWh depends on where you live and on your tariff. In the UK the price cap puts most households at around 25p per kWh; the US average is around 17¢, with big differences between states; Canada, Ireland and Australia have their own rates again. Simply enter your own rate in the calculator below.
Work it out with your electricity rate
Real-life examples (at 25p/¢ per kWh): pre-warming the bathroom for 30 minutes each morning costs about £0.10 a day, or roughly £3.00 a month. Three hours of warmth in the home office in the afternoon come to about £0.60. A weekend with guests in the spare room (four hours) works out at around £0.80. If you pay about 17¢ per kWh, as many US households do, an hour at full power is only around 14¢.
Why real-world use is lower
The table assumes the heater runs at full power non-stop. But the WellHeater has an adjustable thermostat: once your target temperature is reached, it cuts back or cycles on and off. In a well-insulated room it therefore only runs at full power part of the time. The timer also makes sure the heater is never left on by mistake.
Cut your heating bills with zone heating
Let’s be honest: a kilowatt-hour of electricity usually costs more than a kilowatt-hour of gas. So the WellHeater won’t save you money if it permanently replaces the central heating throughout the house – it saves when it takes the load off in the hours and rooms where the central heating would be wasteful:
- Spring and autumn: leave the central heating off or on low and just warm the room you’re using with the WellHeater.
- Working from home: run the house 1–2 degrees cooler during the day – every degree lower saves roughly 6% of heating energy – while the WellHeater keeps your desk comfortable.
- Bathroom: instead of leaving the heating on all night, use the timer to pre-warm for 20–30 minutes before your shower.
- Rarely used rooms: the guest room or hobby room stays cool and only warms up when needed.
Economical heating with 800 watts
- Thermostat & timer prevent waste
- Warm in about 5 minutes
- Just £34.37 per unit in the 4-pack
Comparison: WellHeater vs. other electric heaters
| Heater | Typical power | Cost per hour* |
|---|---|---|
| WellHeater (high mode) | 800 W | £0.20 |
| WellHeater (low mode) | 400 W | £0.10 |
| Mini heater 400–500 W | 400–500 W | £0.10–£0.13 |
| Standard fan heater (US) | 1,500 W | £0.38 |
| Standard fan heater (UK/EU) | 2,000 W | £0.50 |
| Oil-filled radiator | 1,500–2,500 W | £0.38–£0.63 |
| Infrared panel heater | 300–1,200 W | £0.08–£0.30 |
* Full power at 25p/¢ per kWh. What matters isn’t just the wattage, but how quickly a heater makes a room feel warm and whether it scales back with a thermostat and timer. More on this topic: energy efficient space heaters.
WellHeater power consumption: the bottom line
With 800 watts, a thermostat and a timer, the WellHeater is one of the plug in heaters that are cheap to run – as long as you use it the way it’s meant to be used: in one room, for the hours you actually need it. Used like that, it adds comfort for a few pence or cents a day. Ready to try it? The official shop* offers bundle savings of up to 75% and a 30-day money-back guarantee.
Frequently asked questions
How much electricity does the WellHeater use per hour?
At full power, at most 0.8 kWh per hour – at 25p/¢ per kWh that’s about £0.20. In low mode (400 W) it’s half that, about £0.10. With the thermostat working, consumption is usually lower.
Is the WellHeater expensive to run?
No. At 800 watts it uses less than half of a standard 2,000-watt fan heater. Any electric heater only gets expensive when it has to heat whole homes for hours on end.
Can I really save on heating bills with the WellHeater?
Yes, if you heat in a targeted way: turn the central heating down a little and only warm the room you’re using with the WellHeater. As a replacement for heating the whole house, it won’t save money.
How much does a space heater cost to run in the UK?
Multiply the wattage in kW by the hours and your rate. A 2,000-watt heater at around 25p per kWh costs about £0.50 an hour; the 800-watt WellHeater about £0.20.