Automatic Opening Vents

Defensor design and develop custom made Automatic Opening Vent (AOV) control panels that fully integrate with the building Fire Alarm System. Our integrated approach ensures that the system is fully monitored by the Fire Alarm System and cabling between control equipment and vents is minimised. This has the benefit of reducing both the cost and time involved in implementing this kind of control.


We developed this engineered solution in response to client led needs for a retrospectively fitted controller of existing vents. Defensor have successfully delivered this solution on many of the familiar named manufacturers of vents and the controls.

Our engineers are trained to the latest standards in designing and implementing smoke control systems. Our innovative approach ensures that both client requirements and regulatory requirements are met.

Defensor are EasiVent approved suppliers giving us access to the latest range of actuators and control equipment.