• Confirm that the louvre is tested to AS/NZS 4740:2000.
• Mechanical engineer defines the required volume flow rate (m ³/s) for mechanical plant or passive ventilation.
• Mechanical engineer defines the maximum allowable pressure drop across a louvre before fan performance suffers.
• The architect and engineer then balance the louvre façade area (m2) against the effective aerodynamic area of any louvre selections, and the required rain resistance rating, to get a mutually workable outcome.
• Specify the louvre that works for your design aesthetically and achieves the performance classification required for acoustics, aerodynamics and rain defence.

For example: Jupiter 2 Stage Louvre – Class A3

(Example schedule available on draft specification)

Please Note: Louvre performance is proportional to the design air flow. For example, the higher the air velocity the lower the rain defence.