We are looking at buying a new house. My son warned me that a lot of newer houses do not have exhaust fans for the stoves. I have a hard time believing that. I use mine all the time for excessive steam, smoke, or smelly food. He said his own house does not have one. The microwave over his stove has one, but it does not take the air out of the house. I would think a house would not pass inspection without proper exhaust fan.