Without having proper actions in position, hearth and smoke can spread speedily via a building by way of ventilation units. Fireplace dampers and air flow accessories are crucial to minimising this possibility. In contrast to one or multi blade dampers, iris duct dampers consist of a series of overlapping blades https://air-control-dampers-for-h57788.blog-ezine.com/36826652/the-definitive-guide-to-air-control-dampers-for-engine-sheds