Keep cleanliness from the ductwork to stay away from dullness with dust and other interferences on the dampers. The build-up of Grime can ultimately block the passage of air and adversely affect dampers. Hearth dampers, smoke dampers, and mixture hearth/smoke dampers are important to preserving everyday living when fire threatens. https://air-control-dampers-for-h01122.blogsumer.com/35831678/everything-about-air-control-dampers-for-hot-climates