This Infographic is designed by Roofquip

If you need a roof ventilation system for your NZ property that is effective, low cost, and maintenance-free, we have the solution you need at Roofquip. We can also help if you need a ventilation solution for a vehicle or marine application. All our products are made to the highest standards of quality, they require no power source, and there is no maintenance requirement. Simply fit the ventilator and it will work.

Source: Ventilation System NZ