Visual Reference Modules
Picture Series 1:
Controlling Common Outdoor Sources
- Proper Arrangement of Rooftop
- Nearby Outdoor Sources
- Consider All Potential Wind Directions
- Rooftop Maintenance Strategies
- Loading Dock Protocols for IAQ
- Manage Pressure Differentials for Major Sources
- Keep Dirt Out of Building

Picture Series 1 - Controlling Common Outdoor Sources

A. Proper Arrangement of Rooftop
Note: Cooling tower mist is especially vulnerable to microbiological contamination and should have no chance of entering the building outdoor air intake or other building openings.
Remember:
- Arrange your rooftop to make sure that the mists, waste gasses, and vehicle
traffic from nearby roadways or other nearby sources do not contaminate your
own outdoor air supply.
- Make sure that sanitary and other building exhausts are down wind and away from the outdoor air intake.
- If outdoor air is contaminated by a local source, you may need to install an exterior duct extension or move the intake location to an unpolluted area.
![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif)