In my house, when I turn on the range hood, there is a cold air in the bathroom

Using the suction cup on the hook, suck a corner, pull it out, and slowly take the whole piece off.

Regarding the smell in the bathroom when the range hood is turned on, he is because when the range hood is turned on, the indoor air is discharged to the outside, and the indoor air pressure will be lower than the pressure of the surrounding environment of the outdoor house, and the outdoor air will enter the room through various ways, so that the indoor and outdoor pressure can be balanced. So there is still some peculiar smell in the air.

The ceiling of your kitchen should be integrated, that is, piece by piece. Such a roof can be removed. You remove the ceiling and see what the exhaust pipe of the hood is connected to. >>>More

I think that there is no need to open the window, which is conducive to the formation of a relatively closed air circulation environment, which is conducive to the work of the range hood, and then open the window to discharge the residual oil smoke when the range hood is stopped.

It's true that the lines there share a switch. It is recommended to find a regular electrician master to replace the adjustment.