You’ve probably seen them, but what are the spinning things on roofs? Some are whirlybirds, while others are round fans or passive turbines. Which ones are best for you? Find out in this article. And if you’re still not sure, read on. We’ll discuss the pros and cons of each. You’ll find out which roof top gadgets really help your house to keep cool.


What are whirlybirds? In simple terms, they’re machines that spin on a roof. They extract hot air from the roof space and disperse it, ventilating the space below. Because roofs are heat traps, these whirlybirds can help keep your home cool in summer and keep it cool in winter. They’re also great for reducing mould and mildew buildup, as they don’t require electricity.

Unlike traditional vents, whirlybirds are professionally installed. They’re professionally sealed at the base of the vent and at the nail heads, and at the bead that joins the upper and lower sections of the stack. The vertical seams are sealed with silicone caulk or roofing cement. The wind turbines are not susceptible to rot because rain water will simply run down the fins.

The whirlybirds themselves are pretty simple devices, but they can cause problems. Most common problems arise when they’re not installed properly or get old. For example, they may need vents and cool air to circulate. Then, they’ll start to spin and produce an unpleasant smell. But you can’t just turn on your whirlybirds. You need to check your roof’s ventilation for leaks.

Another common problem is heat transfer. A whirlybird doesn’t heat the house directly, but it will help a building keep cool by dispersing hot, humid air. Whirlybirds can reduce heat by up to 50%! If your home has a roof vent, you may want to consider installing one. They’re easy to install and will help your home stay cool. They are also quite conspicuous and will be a focal point in your home.

Round fans

Round fans on roofs serve a dual purpose. They disperse hot air from the attic and lower the temperature in the home. They also help keep paint and roofing materials in good condition and prevent ice dams. They also equalize the temperature in the attic and outside of the home. And they keep stalactites at bay. Listed below are some reasons why you should install a round fan on your roof.

Passive turbines

Installing a passive wind turbine on the top of your home can be beneficial for your energy bills. They are a cost-effective way to get green energy without putting any additional strain on your budget. There are many types of wind turbines, which vary in size and power. If you’re interested in installing one, you can also consider a power vent. Power vents are circular-shaped vents that are installed near the ridge of your roof. They use electricity to pull air from the attic and are typically equipped with a humidistat to keep moisture levels down.

The benefits of installing wind turbines on the roof are numerous. They don’t require any electricity and work with wind energy to pull warm air out of your attic. Moreover, they provide the best attic ventilation. However, they can attract pests, especially if you live in an area with large openings on your roof. Hence, a good wind turbine is essential to your home’s comfort. If you’re worried about attracting pests, you can install multiple turbines on your roof.

Installing a turbine on your roof can increase the value of your property. It is cheaper than installing a roof vent and provides active ventilation. However, turbine vents require wind to work, so they’re less efficient when there’s no breeze. However, when wind blows, they can move massive amounts of air. Compared to other roof vents, they can move more air than a conventional vent. A turbine vent also sticks out from the roofline, so it will be visible to others.

Installation of a wind turbine on your roof requires a small area. They are cheaper than installing a ridge vent, which runs along the entire length of your ridge. But installation is not an easy task. Moreover, because they use wind energy, they require more time and effort. In addition to that, wind turbines tend to rust and require more maintenance. You should take your time to properly install one on your roof, and make sure to do your research and consult with an expert before purchasing a turbine.

When choosing a turbine for your home, remember to keep several factors in mind. First, the type of wind that will be available on your roof. You should ensure that the wind is strong enough to create the turbine. A turbine that spins at full speed will not make the home much cooler or hotter than a roof vent with no wind. You should also ensure that the turbine has a flat surface. The size of the turbine and the type of blades should be able to fit your roof.

Wind turbines can be a great option for your roof. They can also be a great way to ventilate your attic. The Whirlybird fan from Lomanco is an example of an attic wind turbine. It can effectively ventilate up to 770 square feet of space, and its 21 airfoils create enough surface area to rotate the turbine. Additionally, the turbine can deflect rain from the hole.