This aerodynamic rear roof air diffuser disrupts the laminar airflow that separates from the roof sheet, helping to reduce the influence of the rear negative pressure pocket. It is designed for integration into new box van and curtainsider bodywork.
The diffuser is manufactured from GRP and can be used with both shutter and container door configurations.
Installation requires attention to aperture height, as the diffuser lowers the header by approximately 100 mm.
FAQ
What does the rear roof air diffuser do?
It alters the flow separation at the rear roof edge, reducing the strength of the low-pressure zone that forms behind the trailer. This contributes to improved aerodynamic efficiency.
Which body types can the diffuser be fitted to?
It is suitable for new box van and curtainsider builds and can accommodate shutter or container door layouts.
Does the diffuser affect loading aperture height?
Yes. The installation reduces the header height by around 100 mm, so aperture dimensions should be checked at the design stage.
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