Blade dampers make less sounds and are available in two sorts: parallel and opposed dampers. Parallel blade dampers: Their blades transfer in the same way and preserve the airflow. Handbook dampers, However, are altered by hand. This lets you customize the airflow in your procedure to fulfill your unique desires. https://air-control-dampers-for-e89011.blogchaat.com/36845414/air-control-dampers-for-hot-climates-for-dummies