I have bought and had installed 3 of the latest extractor fans from Vent-Axia. One for the bathroom, one for the utility and one for the kitchen.
Don’t really want them, but building regs wants you to fully insulate your home, then ruin it by drilling 4 inch holes through the walls and expect a 2mm plastic flap to keep the cold air out.
These are Bluetooth controlled. Not tried that as the code for it is on the motor housing, which I now cannot see. They cost about £100 each.
On top of that I bought their special internal ducting kit which has a backdraught shutter included. That’s another £25 each.
Here is my video review.
They are driving me mad!!!