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 8

pipe Induced airflow (Fan on)

pipe Induced airflow (Fan off) Pipe with deflector weathercap (not recommended)
  1. Vertical discharge cap.

  1. When fan is OFF, little rain falls into stack.

  1. Deflector weathercap is no longer recommended since contaminants are not dispersed.

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