SSV Air Conditions is one of the leading Manufacturer & Supplier of wide range of Fire Dampers - Motorised & Sensible Fire Dampers are passive fire protection products used in Heating, Ventilation and Air Conditioning (HVAC) ducts to prevent the spread of fire inside the ductwork through fire-resistance rated walls and floors. Fire/smoke dampers are similar to fire dampers in fire resistance rating, and also prevent the spread of smoke inside the ducts. When a rise in temperature occurs, the fire damper closes, usually activated by a thermal element which melts at temperatures higher than ambient but low enough to indicate the presence of a fire, allowing springs to close the damper blades.