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ANSI/AIHA/ASSE Z9.7-2007

Recirculation of Air from Industrial Process Exhaust Systems

This newly updated guideline establishes the minimum criteria for the design and operation of recirculating exhaust systems used for contaminant control in the workplace. Harmful concentrations of air contaminants can be created in the work environment if done incorrectly. Possible safety problems are addressed, as are the materials and processes used to identify industrial process-generated contaminants.

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The American Society of Safety Engineers [ASSE]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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