Hearth dampers are hearth-defending devices which can be applied within HVAC units. They may be intended to quit the fire from spreading throughout the ducts. At a set temperature, the fire damper shuts and varieties a barrier that prevents the hearth from spreading in the ducts. Circular airflow management damper https://aircontroldampersforengin34456.bloggazzo.com/35444496/air-control-dampers-for-hot-climates-an-overview