iPower 4 Inch 100 CFM Booster Fan Inline Duct Vent Blower for HVAC Exhaust and Intake 5.5' Grounded Power Cord Diameter: 4 inch; Air Flow: 100 CFM; Speed: 2930 RPM; Voltage: 110/120V; Wattage: 12W; Noise Level: 40 db. Portable, lightweight and can be installed anywhere; Extra-long 5.5' grounded power cord inside. Superior balanced blades for long service life & quiet operation; Motor features a permanently lubricated bearing that operates quietly and requires no maintenance. 12-Month Warranty. Help boost airflow in HVAC (Heating, Ventilation and Air Conditioning) units and remove exhaust ventilation from grow rooms, kitchens, bathrooms, workshops, basements, attics etc. Solve air delivery problems without major system rework or expense. Note: Max Operating Temp of Motor is 130 / 266; Max Ambient Temp is 60 / 140. The motor on the iPower booster fan is not enclosed and is not to be used in high humidity environments. Please purchase an iPower inline fan instead if you require this functionality.