How Do Spinning Roof Vents Work

Most residential homes have some type of attic ventilation.
How do spinning roof vents work. These are very common to see on older roofs. The popular ridge and soffit ventilation systems and the traditional metal pot vents are also passive ventilation systems. A turbine vent is a passive ventilation device. I ambled around the roof shooting wd 40 specialist spray stay gel lubricant into all the vents getting them spinning smooth and easy.
The faster it spins the more effectively it stucks the water vapour out of your roof and into the atmosphere outside. Fresh air is pulled in under the eaves of the house helping to cool down the roof space. In fact when i was headed to the last vent i noticed the the others were spinning on their own quietly with only the slightest hint of wind wafting by. But the question our customers often ask is do they really work.
The answer is yes they really do. As soon as it starts to spin it vacuums air out of your attic. A turbine vents spins with the slightest breeze.