Exhaust fans are ventilation devices designed to expel stale or contaminated air from enclosed spaces, promoting better indoor air quality. Installed in areas like kitchens, bathrooms, and industrial facilities, exhaust fans work by drawing air out of a space and expelling it outside. They help remove odors, excess moisture, and airborne pollutants, contributing to a healthier and more comfortable environment. Exhaust fans are crucial for maintaining proper ventilation, preventing the buildup of humidity and improving overall air circulation in both residential and commercial settings.