All things being equal, wind-driven turbine vents, also known as a whirlybird roof vent, do move more air than flat vents (but only when the wind blows). The question: How much air must be moved?

Roof ventilation systems are vital to your ... Turbine vents, which are also known as whirlybird vents, harness wind to spin a turbine that pulls air out of the home using suction.