Backdraft Shutters Type AS
AS type units are airstream-operated shutters which give a positive open/closed performance, assisted by spring action and designed for surface mounting.
Colour - Traffic white frame and grey flaps.
All blades on the AS units are linked, giving uniform open/closed operation.
Only 10Pa is required to fully open the blades of both types.
Units are moulded in impact-resistant UV-stabilised plastic.
All AS units have a galvanised guard grille.
These shutters are weather-resistant, making them suitable for both internal and external applications.
Suitable for mounting on vertical surfaces and generally used for exhaust applications.