One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.
Attic turbine fan.
Turbine fans have angled slits cut into a capped cylinder which create a continuous fan blade.
The issue with turbines roof turbines are a cheaper alternative to attic ventilation.
This american designed fan is designed to reduce attic temperatures and remove destructive moisture thus making your home more comfortable and reducing the load on your hvac system and lowering your electricity bills.
They can perform like an active roof vent when the wind is blowing or there is an excellent static pressure in your attic but most of the hot months in texas do not promote the spinning and performance of a roof turbine.
The remington solar ventilation attic fan is completely the remington solar ventilation attic fan is completely powered by free solar energy.