Smoothline Ventilators for corrugated colorbond – for maximum efficiency are positioned at the highest point of the roof just under the ridgecapping.
The reason for this is they have design capability within them to take advantage of the elements and introduce ambient air into the roof and allow stagnant air within the roofspace to evacuate.
Placed either side of the ridgecap they take exceptional advantage of air currents and wind driven airflows to enter and evacuate, no matter which way the wind is blowing or thermal currents are moving.
Due to buoyancy differences having a Smoothline either side of the roof opposing each other or offset will take advantage of these natural forces.
Cooler air falls and much lighter hot air rises, with a Smoothline ventilator the inbuilt design takes advantage of the forces of thermal air currents and wind driven airflows. Not only that further added advantages are convection and the venturi effect.
When looking for roof ventilation you should be looking at the design of a product and weigh up the facts - does this product have any design properties to actually move ambient air throughout the roof cavity.
What you need to be looking for – does this product have the ability to move air or is it just moved by air, for example, like a whirlybird they are simply moved by air but do they have design to move air throughout the roofspace? NO, THEY DON’T.
Let’s look at fans, solar or grid they just have (excuse the expression) a big arsed fan that does everything but have the design capability to move the ambient air throughout the roofspace.
See Blog – “Roof Vents Versus Fans”
If you can find a roof ventilator that has better design than the Smoothline Ventilator to drive the ambient air throughout the roofspace buy it, however knowing what is on the market we doubt you will.