Change to passive tense

A ceiling fan works using a dynamic of movement. Warm air generally rises toward the ceiling. When it isn't circulated, the air stays trapped in the room, thus heating it. The air must be consistently circulated, pushing the hot air out of the room to create space for cooler air. The ceiling fan does this by pushing the air back down through constant movement, which affects the surface of the air produced by breezes.
When the motor is in operation, it turns the blades in varying speeds, depending on how much of a cooling or warming effect is needed. As the blades turn, they gather air--which is then pushed by the leading edge of the blades. This movement forces the air onto the trailing edge, creating a front-to-back movement that produces a breeze.