Fire dampers are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to avoid the spread of fire inside the ductwork and prevent it from spreading to the adjacent compartments. When a rise in temperature occurs, the fire damper closes, usually activated by a thermal element that melts at a temperature higher than ambient but low enough to indicate the presence of a fire, allowing springs to close the damper blades.
Leminar, with the state-of-the-art infrastructure, and highly competent resources backed up with meticulous quality management systems has designed a damper that can meet the stringent requirements of the UL 555 standard for static operations for a 1½ hour rating.