Twista roof ventilators is a Sydney based company that has been manufacturing and installing industrial strength whirly birds for over 10 years. Roof ventilators are an environmentally friendly way of increasing circulation throughout your house, therefore cooling your home in summer, and preventing mould in winter. Unlike cheaper inferior products, Twista roof ventilators have been designed so as to operate in silence. Due to the industrial strength and meticulous design of the whirly birds they do not require maintenance, as the bearings are hardened full steel. Roof ventilators work synergistically with roof insulation, as they are an active means of transporting heated air from the roof cavity, and replacing it with fresh air.
Twista is so confident in the design and durability of their roof ventilators that they come with a 25 year warranty.