Inline Booster Duct Fan 4” 106 CFM with Speed Controller, HVAC Exhaust Ventilati
Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 28 dB noise level does not have any harm and will not disturb your life. Air Flow 264 CFM 106 CFM 275 CFM 430 CFM 195 CFM /.