For example if the length of the roof is 21 meters and you want to install 2 whirlybirds you could measure 7 meters to the centre of the first whirlybird then 7 meters from there to the centre of the second whirlybird leaving a final 7 meters to the other end of the roof.
Installing whirlybird roof vent.
If you are going to install multiple vents they should ideally be equidistant that is evenly spaced from the edges of the roof and each other.
As they spin these vents suck the air out of the container.
A roof vent also known as also known as turbine or whirlybird vents are installed in shipping container roofs.
This technique is also known as cross ventilation.
This video demonstrates the installation of a whirlybird roof ventilator on a trimdek metal roof.
If you re a qualified tradesperson you may like to follow these for whirly bird vent installation also.
Often one vent is installed low and the other one s placed high diagonal from one another.