Series 5150 is a UL555 approved Smoke damper available for Class I, II, or III. Series 5150 can utilize a variety of internally or externally mounted actuators. The damper may be installed vertically or horizontally in ducts penetrating barriers requiring leakage protection, within 24″ of the barrier being protected. This damper has been evaluated with bi-directional airflow, and is rated to 2000 FPM and 4″ static pressure in compliance UL555 4th edition.