This iPower inline duct booster fan is a new exhaust air blower designed for ventilation setups that use 4, 6, or 8 inch ducting. It includes a speed controller, which may help buyers looking for adjustable airflow in grow rooms, household ventilation, or other air-moving applications. Free shipping is included, making it easier to compare total cost before purchase. Since multiple size options are referenced, buyers should confirm the exact inch size needed for their duct system before ordering. This listing may suit shoppers replacing an existing inline booster fan or building a basic ventilation setup. Check the listing for full details. iPower 4/6/8 inch Inline Duct Booster Fan Exhaust Air Blower W/ speed Controller. Condition: New. Listed at 38.99 USD. iPower Booster Fan Inline Duct Vent Blower for HVAC Exhaust and Intake 1. Energy efficient & quiet operation. 2. Lightweight & super easy to install. 3. Engineered for maximum boost with minimum noise. 4. Solve air delivery problems without major system rework or expense. 5. Balanced metal blades are ideal for boosting air supply and venting exhaust air. 6. Can be installed in any location, such as bathrooms, attics, greenhouses, tents, etc. 7. Motor features a permanently lubricated bearing that operates quietly and requires no maintenance. iPower Booster Fan Inline Duct Vent Blower for HVAC Exhaust and Intake Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W. Help to boost airflow in HVAC units to remove exhausts and odors from bathroom. Help to boost airflow in HVAC units to remove exhausts and odors from kitchen. Product Features iPower Booster Fan Inline Duct Vent Blower: 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. iPower Variable Fan Speed Controller Adjuster: Features:4 Options: Off, High, Medium, LowCompatible with ALL Brush Type Motor FanAdjust Range: 50%-100% Note:Do Not apply this item to fan of Shade-Pole Motor and Brush-less MotorDo Not apply this item to fan that more than 350W Power WattageTo avoid the risk of burning out the fan motor, controller Does Not adjust below 50% Package include:1 pack variable fan speed controller, 1 pack 4/6/8 inch booster fan Model comparison Size 4" Fan 6" Fan 8" Fan Diameter 4 inch 6 inch 8 inch Product Dimensions 6 x 5 x 5 inches 8 x 7 x 6.5 inches 9 x 8.5 x 6.5 inches Item Weight 1.54 pounds 2.8 pounds 3.21 pounds Manufacturer iPower iPower iPower Air Flow 100 CFM 240 CFM 420 CFM Speed 2930 RPM 2950 RPM 2970 RPM Voltage 110/120V 110/120V 110/120V Wattage 12W 37W 42W Noise Level 40 db 48 db 50 db Can be perfectly matched with the following products Click image to buy now iPower Air Ducting iPower Fan Speed Controller