Greenheck Damper Models Now UL Approved for Wood-Stud Walls

April, 2006

Greenheck Models OFD and OSFD out-of-the-wall fire dampers and combination fire smoke dampers are now UL approved to be mounted in wood-stud constructed walls.  To obtain this listing the dampers had to pass a 1-1/2 hour fire test in a wall constructed of wood-studs as opposed to standard steel studs.  In addition to the standard fire test pass/fail criteria, the out-of-the-wall dampers were also required to minimize the heat transfer that took place across the wall.  Convenient single side mounting, featured on Greenheck combination fire smoke and fire dampers, is also available on Models OFD and OSFD in wood stud installation for out-of-wall products.


Greenheck, the worldwide leader in manufacturing and distributing air movement and control equipment, offers the most AMCA licensed and the most UL Classified dampers in the industry.

To obtain more information about this Greenheck announcement you may:

  1. Request information via e-mail
  2. Contact your local Greenheck Representative
  3. Phone us at (715) 359-6171 or fax us at (715) 355-2399
  4. Write us at Greenheck, P.O. Box 410, Schofield, WI 54476-0410
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