I am only able to have electric radiators. Delivery good BUT you have to use WIFI to set up timer/temperature. Very difficult to pair them to iPad even when your standing right next to them, it tells you that there is an error and not connecting. I thought that it would be easy to set up timer/temperature but no. Instructions difficult to follow. One of them is cold on top corner and when I called re help was told I had to top it up with water and it would have to be taken off the wall. I requested that it be replaced but this was refused. If your not savvy with Bluetooth etc then these are definitely not for you!!! The only plus is that they look nice…. Very disappointed as I had completely refurbished after moving into a retirement apartment but find the Bluetooth etc problematic and complicated.