A roof fan is a mechanical fan, for the most part electrically fueled, suspended from the roof of a room, that utilizations center mounted pivoting oars to flow air.Ceiling fans normally turn more gradually than different sorts of circling fans, for example, electric work area fans. They cool individuals viably by bringing moderate development into the generally still, hot demeanor of a room. Fans never really cool air, not at all like ventilating gear, they in certainty warm the air because of the waste warmth from the engine and grating, yet utilize fundamentally less power (cooling air is thermodynamically costly).