If we are talking cross ventilation for the enclosed space (inside the home) it’s a great idea to find out the direction of the prevailing winds and in the planning stage design the windows to be placed in strategic positions creating positive pressure streams to circulate through the home.

Maximising airflow by installing windows and doors opposite each other, make sure there are no obstructions when you position windows and doors opposite each other.

When the windows are located in opposing positions, by opening windows on opposite sides of the home this will create excellent cross flow ventilation, open all interior doors to allow a brilliant breeze throughout the house.

Cross ventilation in the roofspace for roof ventilation and cooling is much the same as for the inside of the home. Where you will need two ventilators opposite each other, one as an inlet ventilator and one as an exhaust ventilator however these vents need to be in the roof covering (within the tiles or the colorbond) this is the only way you will achieve cross ventilation of the roofspace that makes sense doesn’t it?  Obviously you will need a number of pairs of roof vents depending on what size the home is however when the ventilators are placed opposite each other without any obstructions between them you will allow positive pressure streams to circulate through the roofspace cooling the home drying out condensation.  This does more for the home than just cooling, it reduces moisture that causes Sick Building Syndrome and flushes out chemical build up.

You cannot beat that.

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