The ventilation fans draft VOC gases or some odors that may pollute the space in the garage. The fans just remove all that bad air, so that the garage has clearer and fresher air. It is very important for our health. Garage exhaust fan has also additional functions such as humidity and heat control inside the garage. If the humidity is high, it may have a bad influence on tools and items in the garage. And if garage is used as a workshop, it can be really hot in it. And due to the fan, the hot air will be ventilated, the heat will be controlled, and all items will be kept in a good condition and without any damages.