iPower 4 Inch 100 CFM Booster Fan Inline Duct Vent Blower with Variable Speed Controller Adjuster Silver

iPower Booster Fan with Variable Speed Controller Help boost airflow in HVAC (heating ventilation and air conditioning) units to remove exhausts and odors from grow rooms kitchens bathrooms workshops basements attics etc. Package including: 1-pack 6 inch booster fan 1-pack variable fan speed controller. iPower Booster Fan Inline Duct Vent Blower Specification: Diameter: 6inch; Air flow: 240 CFM; Speed: 2950 RPM; Voltage: 110/120V; Wattage: 37W; Noise level: 48 db. Superior balanced blades for long service life & quiet operation. Motor features a permanently lubricated bearing that operates quietly and requires no maintenance. Note: If any other materials/particles get into the duct fan and get the blade stuck users are to turn off the power immediately clean it up turn the power back on when handled properly. iPower Variable Fan Speed Controller Adjuster Features: 4 Options: Off High Medium Low Compatible with ALL Brush Type Motor Fan Adjust Range: 50%-100% Note: Do Not apply this item to fan of Shade-Pole Motor and Brush-less Motor Do Not apply this item to fan that more than 350W Power Wattage To avoid the risk of burning out the fan motor controller Does Not adjust below 50%