Lubricate the guide dampers and especially the going pieces to relieve their motion. This can guide in avoiding them from not fitting correctly and so leading to them being particularly rigid to bend. Manual dampers, However, are adjusted by hand. This allows you to customize the airflow inside your method https://air-control-dampers-for-e36678.bloguetechno.com/facts-about-air-control-dampers-for-engine-sheds-revealed-71930688