The Vevor 4-inch inline duct fan is designed to improve airflow for ventilation, exhaust, and dehumidification in spaces like grow tents, hydroponic rooms, kitchens, basements, and equipment rooms. Its EC motor delivers up to 205 CFM airflow while operating quietly for more comfortable everyday use. The included temperature and humidity controller supports ON/OFF, timer, and auto modes for convenient operation. With included mounting accessories and multiple installation options, it is built for flexible setup in a variety of environments.