3 Hour Rated Dynamic Fire Damper

Sizes (WxH)

Model:	MD37
Depth:	5½"
UL Classified:	3 Hour Fire Resistance
Certifications:	Underwriters Laboratories, Inc.: 555 National Fire Protection Association: 80 & 90A ICC's International Building Code
Orientation:	Vertical or Horizontal
Frame Material:	16 ga. Galvanized Steel
Frame Type:	Hat Channel
Blade Material:	16 ga. Galvanized Steel
Blade Action:	Parallel
Axles:	Square, Plated Solid Steel Stub
Bearings:	Oil Impregnated Bronze
Linkage:	Jamb
Stops:	18 ga. Galvanized Steel at Head and Sill
Jamb Seals:	Stainless Steel
Actuator:	Non-Motorized Spring Closure Mechanism
Fusible Link:	165°F

Fusible Link:	212°F (Vertical Only)
Factory-Supplied Sleeve:	Various Depths and Gauges
Transitions:	Round or Oval
Dual Position Indication Package