This assembly shows a fire damper installed within a rated wall penetration. The damper is housed in a sleeve that extends through the wall opening. Mounting angles are secured to both sides of the wall to anchor the sleeve in place. A minimum one-inch overlap is required on all sides of the damper, and a minimum one-quarter-inch clearance is maintained between the sleeve and the wall opening. The configuration accounts for various connection styles including in-airstream, out-of-airstream, and round duct connections.
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