This item is currently out of stock.
When a roof vent fan gets noisy or stops moving air, the Vortex II kit replaces just the fan assembly inside select Heng's vent housings. It runs on 12V DC with three speeds and reverse, so you can pull air out or push it in depending on conditions.
Check that your existing vent housing is a compatible Heng's model before ordering, since this kit is a fan replacement, not a complete vent lid.