How Does A Roof Wind Turbine Work?

Turbine vents (also known as whirly birds) move the air in your attic around utilizing a drawing effect caused by convection (heat rising) even when there is no wind. The air in your attic is moved around 10-12 times per hour if this type of vent is placed appropriately.

On a roof, how do turbines work?

Whirlybirds are another name for turbine roof vents. They are a type of roof vent in which the turbine is mostly powered by wind. When this turbine rotates, air from within the building is sucked up through the vent.

Warm air will be drawn through since it rises, and the vents are located on the top of your home.

Turbine roof vents are designed to seem like a chrome chef’s hat sprouting from the roof. These turbine roof vents have also been meticulously constructed to deliver the greatest results.

Although the turbine requires wind to function correctly, the hot air that rises from your property can also be used to spin it.

Roof turbines: How do they keep water out?

When turbines are properly fitted with a balanced intake and exhaust system, no weather penetration should occur. To deflect water, the turbine comprises twenty-one (21) air-foil curved vanes with rolled edges. The curled edges are intended to direct water down the vanes rather than into the attic.

Do roof turbines allow rain to pass through?

Even the slightest winds will normally cause the turbine vent to spin. The air pushed from the vent is powerful enough to blow rain away from the fins’ holes as it spins. If the vent is corroded, it may become stuck and not turn as it should, allowing water to leak in. Something near or in the vent could possibly be preventing it from turning properly. Inspect the vent for blockages and replace corroded turbine vents if necessary.

What are the functions of wind turbines on a roof?

Roof turbines are vents in your attic that evacuate humid air, preventing mold, mildew, and wood damage. What is the purpose of roof turbines? Warm air rises into your attic throughout the winter months.


Turbine vents may move a lot of air in a short amount of time. In addition, a roof that requires 12-14 vents will only require 3-4 turbine vents, reducing the likelihood of leaks. Turbine vents are incredibly efficient and are the ideal choice for broad gable roofs with limited peak space.


Turbine vents can eventually stop rotating. When the vent stops spinning, it becomes a static vent, and its effectiveness is lost. Turbine vents are considered an eyesore by many because they are located high up and spin.

Is it necessary to cover my roof turbines during the winter?

During the winter, roof ventilation helps to maintain a consistent temperature. Closing your vents makes the attic space too warm and dry, which is ideal for mold and vermin to thrive. Keep your roof vents open to keep the temperature even on your roof and avoid ice dams, which form when water backs up behind your shingles and freezes, causing damage to your roofing components and structure, as well as your gutters.

Snow and ice on the roof melt quickly when the attic becomes too warm owing to closed vents. This allows water to flow freely between the shingles and into the gutters. The refreezing problem is caused by uneven roof temperatures produced by blocked vents.

Is rain a problem for whirlybirds?

Whirlybirds are made to resist strong winds and heavy rain. Water does not penetrate because of the form of the overlapping fins. The Edmonds range is backed by the International Rain Dynamic Penetration Test.

Why isn’t my roof-mounted wind turbine spinning?

Rusted vents and impediments that prevent the vents from spinning are the two most typical causes. If the vents are rusty, they should be changed since they will stick and not spin, and obstacles such dust, ice, and leaves should be removed.

What prevents water from entering the roof vent?

Roof vents have a critical function. They allow air to move beneath your roof and allow the air inside your attic to mingle with the air outside.

This keeps your attic cool in the summer and helps your roof last longer.

Roof vents are available in a number of designs. A ridge vent, turbine vent, powered air vent, or free air vent are all options.

However, some roof air vents have a mushroom-style hood with unprotected sides and sit quite flat to the roof.

Roof vents can also leak water in the event of a heavy rainstorm with strong winds. Rain may be flying up under the hood and into the vent if your roof vent leaks during a strong downpour.

If this is the case, you’ll need to make a breathable shield to keep the raindrops from pelting you while yet allowing air to pass through. This video demonstrates one method of doing so.

How does whirlybird avoid getting wet?

Rainwater cannot enter the roof cavity due to the spinning motion and centrifgul forces operating on the whirlybird turbine. Rainwater simply runs down the outside of the whirlybird turbine’s fins when there is no wind and the turbine is not whirling.