A mechanical tool called a ventilation exhaust fan is used to help a building get rid of pollutants, moisture, smoke, and stale air. The fan operates by taking the air from a room or area and exhaling it outside. In places where ventilation is required, such as bathrooms, kitchens, attics, and other spaces, ventilation exhaust fans can be installed. They exist in many shapes and sizes, such as inline, wall, and ceiling mounted variants. As an extra convenience, some exhaust fans come equipped with built-in heaters or lighting. Utilizing exhaust fans to properly ventilate a space can enhance indoor air quality, reduce moisture, and aid in the prevention of mold and mildew formation.