How do turbine vents work?

Ridge vents and turbines

Since turbines are attached directly to attic spaces, they can siphon away that moist air effectively. They are incredibly effective at venting hot attic air, but there’s not always room for them.

Beside above, what is a turbine vent? A turbine vent is a passive ventilation device. The popular ridge and soffit ventilation systems and the traditional metal pot vents are also passive ventilation systems. A turbine vents spins with the slightest breeze. As soon as it starts to spin, it vacuums air out of your attic.

Beside above, how do whirlybird vents work?

The metal top of whirlybird roof ventilators consists of specially engineered fins that scoop the wind. As winds blow through the turbine, the vent rotates. Basically, heat from the roof space gets drawn upwards and into the whirlybird, which then expels hot air through its vents.

How many Turbine vents do I need?


How Many Do I Need? (Based on 1/300 Rule)
Total Attic Square Footage Recommended Number Of Turbines† Minimum Intake Ventilation (Net Free Area In Sq. In.)
0-1000 2 240
1001-1500 2 360
1501-2000 3 480

Which is better ridge vent or turbine?

A ridge vent is a passive system and offers less air movement, and in moderate climates this style tends to be sufficient. In more extreme climates, one or more turbines will provide better circulation. For optimal performance, ridge vents require soffit venting to bring air up and out the top of the roof.

Do whirlybird vents work?

Whirly birds just by themselves are not very effective. They require vents (either in the eaves or in the ceiling of the house) to let cooler air in as the warm air is expelled through the turbine. So, if you are getting whirly birds installed, make sure that there are adequate ceiling vents to allow air replacement.

Should I cover turbine roof vents in winter?

There are many types of vents that you may have on your roof, including turbine, soffit, rafter and metal pot vents, but you should not cover any of these roof vents during the winter. In the winter, moisture in your home is likely to rise into the attic.

Do turbine roof vents leak?

Turbine vents are a type of exhaust vent. They have fins that open when they turn in the wind, and this spinning action creates suction that draws hot, humid attic air outside. Turbine vents can leak, but you don’t always have to replace the vent.

What is the best type of roof vent?

The following are some of the best roof vents available in the market and you should consider them. Heng’s 71111-C1G1 Standard Mount Universal Vent – White. Lippert Components 389381 White Roof Vent. Broan-NuTone 634M Roof Cap Black Up to 6″ Round Duct.

How do you fix a noisy roof turbine?

Fixing a squeaky turbine vent helps increase operational efficiency. Extend your ladder, leaning it against a solid gutter or roof element. Locate the turbine vent. Allow the lubricant a few minutes to thoroughly penetrate. Wipe or spray the lithium grease in the same places where you applied the silicone.

Why is my roof turbine not spinning?

Attic turbines should spin as heat rises. The spinning turbines pull warm air from the attic more quickly. But if turbines won’t spin the effectiveness of your ventilation system decreases. Attic turbines will help to keep moisture from inside the roof.

Can a roof have too much ventilation?

Dangers of Too Much Ventilation If you have too much air circulating, your roof will collect moisture causing damages that will weaken spots and then cause leaking. During the warmer months, your air conditioner is going to kick into overdrive to keep up with the warm air that comes in from the outside.

Do whirlybirds let rain in?

When installed by professionals, whirlybirds do not leak or let in rain. When there is no wind and the turbine is not spinning, the rain water simply runs down the outside of the fins on the whirlybird turbine.

Do whirlybirds make a difference?

Whirlybirds are inexpensive, but not very effective in moving enough air in the roof space in comparison to other roof vents.

Are whirlybirds worth it?

Unfortunately, a single whirlybird will not usually suffice for a modern home, and may require up to four or six units to be installed to feel an effect! It is worth noting however that they can assist in reducing heat build-up as well as humidity while enhancing air movement in your home.

How many roof vents are needed?

Fan Calculation. As a general rule, your roof needs 1 square foot of vent area for every 150 square feet of attic space. Thus, if your attic is 450 square feet, you need roof vents equaling 3 square feet.

What are whirlybirds for?

Whirlybirds are cylindrical domes with fins that spin in the wind to create a vacuum, sucking up warm air in a roof cavity. They are cheap and easy to install, and for smaller houses or apartments they are a viable alternative to larger ventilation systems.