Suitable for Grow Tents: The inline duct fan is ideal for small indoor ventilation and grow tent applications. It helps reduce odors caused by stagnant air while ensuring comprehensive airflow and circulation Quiet Operation: Even at a maximum airflow of 720 CFM, the inline exhaust fan operates at a low 55 dB. The strong airflow ensures timely ventilation, and even during overnight continuous operation, it won't cause disturbance to your sleep Built-In Filter: The inline vent fan comes with a filter that captures odors and fine particles, filtering and releasing fresh air while minimizing unwanted smells in your space Adjustable Airflow: Equipped with a stepless control knob, this ventilation fan allows to easily adjust the airflow to suit indoor ventilation needs throughout the year Complete Accessory Kit: This set includes the inline duct fan, user manual, 2 duct clamps, 2 hanging straps, and an 8 ft double-layer aluminum foil duct