How Do Roof Turbine Vents Work

A single 14 inch diameter turbine vent that is subjected to 15 mph winds can expel up to 1 342 cfm of air.

How do roof turbine vents work. 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. For an attic to ventilate properly it must have a balanced system with equal amounts of 50 intake and 50 exhaust. Whirlybird roof turbine vents are as easy to install as turtle vents and are one of the most popular ways remove hot air out of the attic space. How much air must be moved.

Wind driven turbine vent wind driven roof vents will pull more air from the attic but only when the wind is blowing. How do turbine roof vents work. A roofer will from the attic mark a spot near the ridge of the roof he may first use nails from the attic to mark preferred spots between two rafters. Because warm air rises up the wind powered vents with their spinning action tend to suck the air outside.

Turbine vents use a combination of wind and convection to extract stale hot air from inside your home and replace it with the cool clean air from the outside. 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. Since turbines are attached directly to attic spaces they can siphon away that moist air effectively.