Basic Documentation

Table Of Contents
Ventilation Systems
Siemens Industry, Inc. 117
Topic Requirement(s) Commentary
Energy
Conservation
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A.8.4.2 Consideration should be made of the potential contamination of the fresh air
supply by exhaust air containing vapors of flammable or toxic chemicals when using
devices for energy conservation purposes.
8.4.2.1 Devices that could result in recirculation of exhaust air or exhausted
contaminants shall not be used unless designed in accordance with Section 4:10:1,
“Nonlaboratory Air,” and Section 4:10.2, “General Room Exhaust” of ANSI/AIHA Z9.5,
Laboratory Ventilation.
8.4.2.2 Devices that could result in recirculation of exhaust air or exhausted
contaminants shall not be used unless designed in accordance with Section 4:10.1,
“Nonlaboratory Air,” and Section 4:10.2, “General Room Exhaust,” of ANSI/AIHA Z9.5,
Laboratory Ventilation.
8.8.6 For auxiliary air fume hoods, auxiliary air shall be introduced exterior to the hood
face in such a manner that the airflow does not compromise the protection provided by
the hood and so that an imbalance of auxiliary air to exhaust air will not pressurize the
hood interior.
American Conference of Governmental Industrial Hygienists (ACGIH)
INDUSTRIAL VENTILATION A Manual of Recommended Practice, 27th Edition
VS-35-02 (General Use Laboratory Hoods)
J. For energy conservation, use horizontal sliding sash with airfoil sill.
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