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Three-Sided Angle Installation for Greenheck Fire and Combination Fire Smoke Dampers

February 2, 2019
Greenheck has developed a UL-approved three-sided retaining angle installation method for fire and combination fire smoke dampers. This method is ideal for installations where the damper sleeve is tight up against a wall, floor, or other obstruction with no room for a retaining angle on one side. Greenheck’s installation does not require the use of any firestop material, while other three-sided angle installation methods require fire stop material to be applied to a specified minimum thickness on the side of the damper without the retaining angle. With three-sided angle installation method, fasteners are run from inside the damper into the wall opening on the side without the retaining angle.
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Three-Sided Angle Installation for Greenheck Fire and Combination Fire Smoke Dampers

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