Jump to main content.

Pollution Flows in Underground Garage

Animation Series 4:
Pollution Flows in Underground Garage
  1. Normal Flows with Exhaust Fan
  2. Inadequate Pressure Control

Text Module Series

Visual Reference Modules Home

Inadequate Pressure Control

2. Garage contaminants are entering the vestibule... 1. Exhaust fans are not operating, and a strong wind at the garage entrance...

Mouse over the animated picture above to see messages which are referenced in more detail below.
Pressure relationships between rooms is designated at the bottom of each room (with a plus for positive and minus for negative pressure).

  1. [GARAGE]: Exhaust fans are not operating, and a strong wind at the garage entrance pressurizes the garage.   This allows garage contaminants to enter the vestibule.
     
  2. [VESTIBULE]: Garage contaminants are entering the vestibule. At the same time, the stack effect is drawing a column of air up the elevator shaft and the stairwell and into the building.   Building occupants are subject to carbon monoxide and other garage contaminants. GARAGE FANS SHOULD BE OPERATING DURING HEAVY USE PERIODS. Pressure relationships between the garage and the vestibule should be checked under different operating conditions.

Previous | Home | Picture Series 1 - Controlling Common Outdoor Sources

Top of page

About the Indoor Environments Division | Where You Live | Site Index

Local Navigation

Jump to main content.