Use fire and smoke dampers from Grainger in office buildings, healthcare facilities and other buildings to prevent the spread of fire and smoke if that emergency should occur. Installed inside HVAC ductwork, the damper blades automatically close when a rise in temperature occurs or a smoke alarm goes off. Look through this selection for a round, rectangular or square damper in the size that fits your ductwork, retaining angle frames and fusible links. Help protect your buildings and the people in them from the dangerous spread of fire and smoke in an emergency situation. Get the right fire and smoke dampers from Grainger today.