Service Alert

In the event of a temporary state government shutdown July 1, many services on the L&I website would remain available to our customers. However, virtually all services involving L&I personnel will not be available. Please view the list of services impacted by a shutdown.

Ventilation - Figure 4

Top illustration shows a source 2 inches away from the hood, which requires 1000 CF/M of airflow. Bottom illustration shows a source 4 inches away from the hood, which requires 4000 CF/M of airflow.


Place hood as close to the source of the contaminant as possible. The required volume varies with the square of the distance to the source.

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