When closed, Each and every close rests about the one particular beneath it. This damper design and style finds its primary use in ducts with fixed airflow. Opposed blade dampers: Given that the identify reveals, they move in reverse directions and support in directing the airflow in reverse Instructions. two: https://caidenmeshu.bloggactivo.com/35902294/5-essential-elements-for-air-control-dampers-for-engine-sheds