MiniMax ‘SR’ is a self regulating, acoustic vent specifically engineered for ‘unobtrusive’ compact fitting above a transom. Where MiniMax ‘SR’ sits above a transom, it comes with an extended cowl, making it ideally suited for applications in curtain walling systems. The acoustic air inlet is exceptionally suitable for applications in situations exposed to lower levels of noise disturbance. MiniMax ‘SR’ series vents are particularly well suited for use in combination with DucoMax ‘SR’ series acoustic vents. MiniMax ‘SR’ and DucoMax ‘SR’ series vents have identical inside views. Also, vent height, built-in height and compact transom mounting are equal.