What does an exhaust fan do and how does it help improve air quality in a room?

An exhaust fan helps improve air quality in a room by removing stale air, odors, and moisture. It works by pulling the indoor air out of the room and expelling it outside, allowing fresh air to come in. This helps to reduce humidity levels, prevent mold and mildew growth, and eliminate pollutants, creating a healthier and more comfortable indoor environment.