Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
Attic ventilation turbine vents.
Only a small section of roof needs to be removed to put in the vent and then it gets sealed with flashing and sealant.
Price low to high.
Wind driven roof vents will pull more air from the attic but only when the wind is blowing.
Intake vents located at the lowest part of the roof under the eaves allow cool.
Rough opening width in.
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.
Roofing attic ventilation.
Air vent airhawk 12 in aluminum externally braced roof turbine vent.
They may not work as well in areas that don t get enough wind but they are easier to install.
A turbine is installed directly on the top of a roof and uses wind power to suck hot and humid air out of the attic.
Item 863694 model tob12sbr.
Turbine vents are those ice cream cone looking vents that turn in the wind using a series of vanes like a weather vane allowing warm moist air to escape at the top of your roof.
Price high to low.
Flat roof vents have no moving parts to break or squeak but don t vent as much air as wind driven vents.
A turbine has a series of vanes that spin as wind passes through them.
A ridge vent runs across the top of the roof s peak.
Two types of attic ventilation vents compared turbine vents roof with turbine attic vent.