Upgrade your noisy, inefficient vent fan without replacing the entire vent or disturbing the rooftop seal. Just replace the existing screen and 12-volt fan with the high-velocity three-speed Vortex II Fan Kit to turn your roof vent into a powerful ventilation system. Enjoy over 300% more air movement over standard roof vents. Quiet operation with three forward speeds and two reverse. 9 fan blade. Easy installation with only a screwdriver.
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