The damper is used only for duct systems. The damper is not intended for use in a rooftop configuration. The backdraft damper with a gravity plate is used for supply pressurisation systems and designed for shutoff of air flow during standstill of ventilation equipment. The damper plate opens with the pressure created by the air flow and closes under its own weight, blocking the duct. The KOM1-VO damper is only suitable for air supply duty and must be installed in the vertical position.
The damper is made from polymer coated steel and has a single blade which closes under its own weight.
