Two Bladed Insulated Static Rectangular Ceiling Radiation Damper

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Model:	291
Filter:	291
Standard Depth:	2 ²¹/₃₂"
Minimum Panel Size:	11" x 6"
Maximum Panel Size:	18" x 18" (324 in²)
Orientation:	Horizontal
Frame Material:	One Piece 22 ga. Galvanized Steel
Blade Material:	22 ga. Galvanized Steel
Insulation:	½" Thick Gypsum
Fusible Link:	165°F
Spring:	Extension Type
Finish:	Mill
Certifications:	Underwriters Laboratories, Inc.: 555C New York City MEA Listing #110-99-M CA State Fire Marshal Listing #3226-1328:105 1 Hour Combustible Ceiling Assemblies 1 and 2 Hour Non-Combustible Ceiling Assemblies
UL Classified:	2 Hour or Less Fire Resistance

212°F Fusible Link
Thermal Blanket
Top Extension:	Total Frame Depth: 9¼" for height of 5¾" - 14" 10¾" for height of 14¾" - 18"
Bottom Extension:	Total Frame Depth 6⅛"
Top & Bottom Extension:	Total Frame Depth: 9¼" for height of 5¾" - 10" 10¾" for height of 10¾" - 14" 12¾" for height of 14¾" - 18"