When closed, each conclude rests about the one particular beneath it. This damper style finds its primary use in ducts with preset airflow. It's important to have HVAC dampers inspected on a regular basis to make sure they are operating effectively and to avoid high priced repairs in the future. https://air-control-dampers-for-e24567.anchor-blog.com/16979638/the-ultimate-guide-to-air-control-dampers-for-hot-climates