The Holyoake OHL-45R circular louver is suitable for all low pressure air-conditioning, heating and ventilation requirements where supply and exhaust openings require protection against the direct ingress of rain, birds, insects etc.The OHL-45R circular louvre is constructed from extruded aluminium in a flange frame and is available with galvanised bird mesh steel wire in the following standard sizes:

• 150mm, 200mm, 250mm, 300mm, 350mm, 400mm