Overspressure shutters with gravity closing blades. Designed to protect various ventillation or fan exhaust oprenings.

Application: these are used to keep an over- or underpressure difference between two rooms or between the internal and external enviroment.

Mounting: is mounted on the outside on the outer wall of the building, usually where they are mounted axial fans and duct wall provided with ventilation exhaust fan.

Fixing: standard with visible screw (the same colour as trasfer grille).

Material: aluminum. Finish: is aluminium-grey AL90ö6, another RAL color or aluminium finish as optionally.

Options:
-wire mesh