3-Hour Curtain Ceiling Radiation Damper 2720 Residential Registers & Grilles Holds up to a 4"

Holds up to a 4" filter (not included) with filter retention tabs (FG4)

remove the two center cones as a unit and reposition the six screws

Available in even sizes 6" to 20" and 24"

Standard Features * Extruded aluminum construction with steel multi-shutter damper * Margin edges are 7/8" projection for baseboard installation * Nylon bushings for easy adjustment and quiet setting of airfoil blades running parallel to shortest dimension * Countersunk mounting holes for flush appearance

3-Hour Curtain Ceiling Radiation Damper 2720 Residential Registers & Grilles Holds up to a 4"Standard Features Square or rectangular ceiling radiation curtain type damper for horizontal mounting Designed for protection of ceiling openings in fire rated floor ceiling assemblies with fire resistance ratings of 3 hours or less UL listed and tested in accordance with UL Standard 555C 3 hour fire resistance rating Building materials rated 3 hours or less CSFM California State Fire Marshal listed 22 gauge steel blades with an insulated blanket