Fan: 2 ball bearing; 2700rpm; 39cfm; rated for 50,000hr. The Solar RVOblasterT Fan (patent-pending) comes pre-installed on a brown NorWesCo 8" metal RVO38 roof vent with flashing (17"x17).
This uniform air movement helps keep your roof's deck (the plywood, the trusses, and the rafters) dry and moisture free. Ideally, the fan should run in summer, to remove excessive heat, and winter, to remove moisture due to condensation.