Not if you’re heating to the same temperature.

What you pay depends on how much heat the room loses, not how powerful the radiator is.

If your space needs 700W to stay warm, a 1000W or 2000W radiator will still use about 700W on average. That’s because the thermostat adjusts output automatically to keep things efficient.

Here’s how higher-wattage radiators behave:
- They heat the room faster when you first switch them on.
- Once warm, they use less surface temperature to maintain comfort.
- They don’t use more energy overall. They just get there faster.

A radiator that’s too small (like a 500W in a 700W room) will run flat-out and still not get you warm. That’s frustrating and not efficient.
We size our radiators for the coldest times of year, like a frosty winter morning, so you’re always covered. On milder days, they’ll naturally use less power.