Automatic dampers are controlled by a motorized actuator and might be programmed to open up and close at particular periods or depending on particular problems, like temperature or humidity stages. Smoke dampers are just like fire dampers but are specially intended to control the spread of smoke in the building. https://aircontroldampersforengin67900.theblogfairy.com/35652658/a-secret-weapon-for-air-control-dampers-for-engine-sheds