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You can't smash two!
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Open the air hole by the top wall, and install an exhaust net on the ceiling. The method of not changing the type of house.
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Nowadays, there are generally snorkels, so you can take advantage of them.
Bathroom without windows.
Bai Shengma suggested that the installation of exhaust fans should be installed >>>More
First, the bathroom is designed to separate dry and wet as much as possible. >>>More
In the past, the heating has passed, and the big project may have to plow the ground.
If neither 1 nor 2 directions can open the window.
Open in the direction of 3. >>>More
Put the bathroom on the balcony, knock off the door between the kitchen and the balcony, the bathroom and the kitchen smell have little effect, provided that you need to install an exhaust fan in the bathroom, but it seems that from your picture, the bathroom does not have a wind shaft, if there is no wind shaft, it is recommended that you should make the bathroom window can be directly outside.