Tornado Dampers - Greenheck - Facility Management Product Release
Tornado Dampers are designed so that the negative pressure of a tornado will close the damper and prevent collapse of ductwork. Dampers are installed in ductwork, or wall mounted, near the exterior of a building. Once the tornado has passed and pressure equalizes, the spring-loaded blades will return damper to its open position and revert back to normal ventilation.
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