How Do Whirlybird Roof Vents Work

With whirlybirds installed hot air is extracted from the roof space and fresh air is drawn in from outside.

How do whirlybird roof vents work. The temperature in your roof space can reach 60 degrees on a hot day and that heat has nowhere to go. But the question our customers often ask is do they really work. These are very common to see on older roofs. They are cheap and easy to install and for smaller houses or apartments they are a viable alternative to larger ventilation systems.

So by just sitting there the heat radiates into your home through your ceiling bringing the temperature up and making your fans or air conditioner work harder than they would if your. How do whirlybirds work. Using inside air via ceiling ventilation to feed a roof ventilation device encourages hot summer air from outside via windows doors and other points of air leakage to come inside overloading your air conditioning system. 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.

Yes the installation of whirlybirds on your roof can reduce the costs of cooling your home considerably. Flat roof vents have no moving parts to break or squeak but don t vent as much air as wind driven vents. Whirlybirds are cylindrical domes with fins that spin in the wind to create a vacuum sucking up warm air in a roof cavity. The key is in installing a ventilation system containing whirlybirds rather than just installing whirlybirds by themselves.

What do our customers say about the whirlybirds that have been installed on their homes and commercial properties. Because warm air rises up the wind powered vents with their spinning action tend to suck the air outside. Most residential homes have some type of attic ventilation. Whirlybirds come in two varieties active and passive.

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. How do turbine roof vents work. During the hot days of summer the temperatures within a roof can reach over 70 degrees celsius effectively heating the entire house. Whirlybird roof turbines vents you know those funny spinning things you see up on the roof tops.

The answer is yes they really do. The home does not have an endless supply of cold air available for ventilating through a whirly bird. Many thanks marc webb.