W 100 Mixed Flow 4 Inch Inline Exhaust Fan which is mainly intended for ventilation in household and commercial applications. It is simple to clean and install. It is compatible with duct pipe. This fan is the appropriate choice for air exhaust systems in high humidity areas such as bathrooms and kitchens. W 100 Mixed Flow 4 Inch Inline Exhaust Fan ventilates grow tents silently, transmits heating, cooling to rooms, and circulates fresh air, cool AV closets, and exhaust smells. A removable duct with a plug is provided for simple removal and repair.