VIVOSUN AeroWave A6 6 in. 2-Speed Black Clip Fan with Fully-Adjustable Tilt for Grow Tent

At just 40 dB at its loudest, this fan runs ultra-quiet, and with an upgraded 20W copper motor still produces powerful airflow for coolness you can feel even from a distance. This patented clamping fan can easily hold tight on round, square poles, and flat surface. Its clamp has a thick rubber pad to ensure it does not slip or scratch surfaces.