Development of push-pull ventilation.

Push-pull ventilation (air is blown across a contaminant generation area toward an exhaust hood) can have distinct advantages over exhaust ventilation alone. It can control contaminant emission into the workplace better than exhaust only, and much less conditioned air must be exhausted so there are energy savings. This paper presents suggested push and pull flow rates for open surface tank operations such as plating. About 98% of the contaminant generated can be captured by a push-pull system using the proper flow rates.