CVS-SAFE4 Out of Wall and Front Access Smoke Dampers are tested to UL555S standard. These UL Classified dampers are intended to protect HVAC penetrations made through only smoke rated walls and floors. These leakage rated dampers have been investigated for a leakage rating as defined under Class I or Class II at an elevated temperature 350 deg. F. Leage ratings of smoke dampers are established based on test conditions using heated air. The basic requirement for a smoke damper is to operate at 2000 feet per minute when open and 4" w.g. of static pressure when closed.

These models are intended for installation in fire barriers with limited or restricted access to the other side of the fire barrier for installation, cabling and future maintenance. The standard design or construction of a smoke damper is not suitable for installation in such applications or locations.

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