Applications
Gravity louvre shutter for rectangular air ducts. The shutter is closed during the system standby preventing back draft.
Design
The shutter is made of galvanized steel. The housing equipped with light-weighted plastic gravity blades inserted into the external frame.
The blades are opened by the air flow and are closed when the fan is not running preventing back draft.
Mounting
Mounted horizontally in the duct allowing the blades to close under their own weight. Correct direction of air flow should be considered.