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Positive air flow shutdown system

Image Number 11 for United States Patent #7169039.

An airflow shutdown system that includes an air distribution system and an air duct closure device. The air duct closure device is adapted to substantially instantaneously block airflow in the air distribution system when activated. The system also includes an integrated control system coupled to the air distribution system and adapted to activate the air duct closure device and stop an operation of other air distribution devices in the air distribution system in order to prevent migration of air through the system.

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