vivosun 4 inch inline duct fan 100 cfm, hvac exhaust intake fan, low noise & extra long 5.5' grounded power cord vivosun <b>vivosun duct fan inline fan for household / grow room ventilation</b><br><br> <b>item specifications:</b><br> -diameter: 4 inch<br>-power supply: 110/120v<br> -power: 12 w<br> -speed: 2930 rpm<br> -air flow: 100 cfm<br> -cord length: 5.5 feet<br> -warranty: 1-year<br> <br><br><b>key features:</b><br> -perfect for boosting air flow in long runs of ducting<br>-energy efficient & quiet operation<br> -lightweight & super easy to install<br> -fluted on both ends to receive ducting<br> -balanced metal blades are ideal for boosting air supply and venting exhaust air<br> -engineered for maximum boost with minimum noise<br> -motor features a permanently lubricated bearing that operates quietly and requires no maintenance<br> -solve air delivery problems without major system rework or expense<br> -can be installed in any location, such as bathrooms, attics, greenhouses, tents, etc.