What are Backdraft Dampers?
At the most basic level, a damper is an adjustable plate, or assembly of plates, which is used to control or to alternately block and allow a draft or an airflow. Backdraft dampers specifically designed to permit air to flow in only one direction, as for example in an exhaust duct where air needs to flow out of a building, but outside air needs to be prevented from flowing in through that same duct. Generally, backdraft dampers remains in a “closed” position except when air is flowing in the direction intended. The backdraft damper may be designed so that the airflow itself opens the damper to allow the exhaust to take place. Backdraft dampers may, however, be designed to be opened or closed manually or via a motor, if need be for the given application. Counterbalanced backdraft dampers have weights or springs added to the blades in order to help or slow the opening or closing action as may be required. EMW’s expertise and capabilities as a full service custom precision metal fabricato
