When shut, Each individual stop rests about the one beneath it. This damper style finds its Major use in ducts with fastened airflow. Nevertheless, a person downside of selecting this kind of damper in HVAC is that they are greatest for temporary use when keeping the airflow within an HVAC https://andrewlzob.blog2freedom.com/36699471/top-guidelines-of-air-control-dampers-for-hot-climates