Words cannot describe how good it feels to wrap yourself into one of these when you’re cold.
I heat my house with just a heatpump but it can’t quite keep up when it gets well below 10 degrees celcius and I’m too cheap to turn on electric radiators. I bought an electric blanket for 22 euros and I just heat that instead. Even just sitting on it makes a huge difference.
Oil-filled radiators, despite being electric heaters, do cost less to run than regular space heaters or electric baseboard heaters if all other things remain equal. This is because the oil they’re filled with acts as a much more effective thermal mass than the air in the room. It takes about the same amount of energy to heat the room to your desired temp, but then the heater can switch off for longer while the oil continues to radiate stored heat into the air.