Description: The company developed a UL-approved, three-sided retaining angle installation method for these products. This method is considered 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. It does not require the use of any firestop material. With this specific three-sided angle installation method, fasteners are run from inside the damper into the wall opening on the side without the retaining angle, which makes for a faster, cleaner, and more cost-effective installation.
Contact: 715-359-6171; www.greenheck.com; eProduct 185