• Ensure the louvre is tested to AS/NZS 4740.
• The mechanical engineer defines the required airflow rate (m³/s) for mechanical plant or passive ventilation.
• The mechanical engineer also specifies the maximum allowable pressure drop (Pa) across the louvre to maintain fan performance.
• The architect and engineer collaborate to balance the louvre façade area (m²), pressure drop, rain resistance, and louvre selection to achieve a functional and aesthetic design.
• Select a louvre that meets both the aesthetic and performance requirements, including acoustics, aerodynamics, and rain resistance (e.g., Jupiter Series 2 Stage Louvre – Class A3).

Note: Rain resistance decreases with higher airflow velocity, and pressure drop decreases with larger louvre face areas.

Example schedules are available in the draft specification.