Al-Andalosia

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Gravity Shutters

Product Description

Extruded aluminum section frame.
Blades formed from aluminum sheet.
Blade stub shafts are brass.
Bearing section in plastic PVC pushes.
Sealing foam strips on the blades where they overlap to insure a good seal and to reduce noise.
The blades are designed and positioned in such a way that if the pressure in the room increases, the blades automatically lift and open relieving the pressure in.
When the room pressure is normalized the blades drop to the close position by gravity.