WhispAIR Mixed-Flow fans are well built, Robust compact extraction fans, pre-wired and ready to use out of the box featuring an in-built two speed fan controller to give the user more functionality over their growing environment. Each fan comes with an easy mount robust bracket that can be fitted to a wall, each fan can then be removed from the bracket for ease of cleaning and maintenance. The bracket stops any vibration and limits noise transfer. -New, improved design-Robust compact design-Easy installation with heavy duty mounting bracket-Excellent quality, entry level fan-Use with WhispAIR Carbon Filter foroptimal airflow-Low power consumption, quiet operation-Dual airflow Airflows: 4” 100mm Mixed Flow Fan - 165-198 m3h5” 125mm Mixed Flow Fan - 248-284 m3h6” 150mm Mixed Flow Fan - 410-530 m3h8” 200mm Mixed Flow Fan - 690-830 m3hMixed Flow Fans Noise Levels: 4” 100mm Mixed Flow Fan - 26-31 dBA5” 125mm Mixed Flow Fan - 26-31 dBA6” 150mm Mixed Flow Fan - 29-33 dBA8” 200mm Mixed Flow Fan - 55-62 dBA