How To Ventilate A Bathroom Without Windows?

How To Ventilate A Bathroom Without Windows ( 7 Proven Steps). It is hard to install windows in bathrooms and there is no point in putting a fan as an exhaust fan draws air from outside which will create negative pressure inside the bathroom as opposed to positive (outside) pressure, meaning all air will flow into your house instead of out of it. They do not have windows and can quickly accumulate harmful gases and odors, which can be extremely dangerous to those in the room.