Blade dampers make less noise and are available in two types: parallel and opposed dampers. Parallel blade dampers: Their blades transfer in precisely the same way and maintain the airflow. Dampers appear in various sizes and shapes, but all of them have the very same simple parts. They include a https://cristianypesf.blog-eye.com/36689709/air-control-dampers-for-engine-sheds-no-further-a-mystery