A ridge vent runs across the top of the roof s peak.
Cool attic turbine.
Good attic ventilation is important for preventing ice dams in the winter.
A turbine has a series of vanes that spin as wind passes through them.
A single 14 inch diameter turbine vent that is subjected to 15 mph winds can expel up to 1 342 cfm of air.
A small 12 inch diameter turbine vent with a constant wind speed of 5 miles per hour mph can remove 347 cubic feet of air per minute cfm from the attic space.
These can be ridge vents wind turbines or the flat vents your roofer wants to install.
Unlike turbines this venting style does not have any moving parts.
Get free shipping on qualified roof turbines or buy online pick up in store today in the building materials department.
Intake vents located at the lowest part of the roof under.
Attic must have 5 sq.
Find roof turbine vents at lowe s today.