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Controlling Ventilation Air Flows
Animation Series 1:
Controlling Ventilation Air Flows
- Desired Ventilation Flows
- Overcrowded Offices
- Air Handling Unit Contaminated
- Outdoor Air Damper Opening Reduced
- Exhaust Not Operating Properly
- Supply Air to Office Shut Off or Pinched Down
- Economizer Operating
- Contaminated Outdoor Air
Contaminated Outdoor Air
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).
- [OUTDOOR AIR] The outdoor air is contaminated from nearby pollution sources outside. This is why the LOCATION OF THE OUTDOOR AIR INTAKE relative to local outdoor
pollution sources is very important. Alternatively, the ambient air may be heavily contaminated during an air pollution episode. How does the outdoor pollution affect the
occupied spaces inside?
- [OCCUPIED SPACES] Outdoor pollution enters the building through the outdoor air supply and is carried through the supply air ducts to the occupied spaces. It is not diluting indoor sources but is adding to them. Overall pollution levels inside the building are ELEVATED FROM BOTH THE INDOOR AND THE OUTDOOR POLLUTION SOURCES.
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