A WEBSITE FOR CURVENT’S PINNACLE TURBINES
The industry term for a roof turbine ventilator is commonly known as a Whirlybird, which literally means helicopter. Helicopters have spinning blades, and Whirlybirds typically have cylindrical domes with fins that spin in the wind to create a vacuum, sucking up warm air out of a building. The term Whirlybird® Turbine Ventilator is registered as a trademark by a company in Jacksonville, Arkansas, in the United States (2013). However Wikipedia describes a Whirlybird as an Atti
