The very simple principle of Horizontal air flow is firstly to invigorate the internal environment and secondly to circulate, mix and stabilize the temperature regime. In still air, warm air rises and will quickly pool in the highest point of the roof, however this is very easily prevented by causing some gentle air motion. This air motion needs only to be very slight but thoroughly throughout the entire house.

The third but most important benefit is the reduction in fungal sprays required as a result of installing Vortex Fans.

The reason for this is that the gentle air movement displaces transpiration moisture from the foliage and lowers the dew point at the leaf surface. The combination of air movement and drier foliage radically inhibits fungal growth of all kinds and may substantially reduce the need to use fungicides.