vivosun 6" inline exhaust fan & speed controller, low noise workshop 345 cfm duct fan for hvac ventilation, vent booster fan in grow tent, basement, bathroom, kitchen, attic, 3d printer 6" pro is up for auction in Home & Kitchen. The current bid is $1.50, 96% below the $33.99 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.