The No. 1 question about fire and smoke dampers that mechanical engineers and contractors ask is, “How do the controls work with the actuators?” This article explains that. DAMPER TYPES We must clearly distinguish among three types of dampers. Fire dampers Fire dampers, which rarely are actuated, close when a rise in temperature occurs and stay shut to stop fire from passing through a barrier. About 90 percent of fire dampers are curtain-type dampers that close when a ...
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