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Containing Construction Containments

Animation Series 3:
Containing Construction Containments
  1. Construction Area Contained
  2. Poor Containment Strategy
  3. Temporary Exhaust is OK
  4. Incorrect Ventilation Concept

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Poor Containment Strategy

3. Construction contaminants flow through the return air path... 2. The RETURN in this area was NOT BLOCKED... 1. Inadequate negative pressure in the containment area resulted...
poor containment strategy

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. [CONTAINMENT AREA]  Inadequate negative pressure in the containment area resulted because the containment area was not adequately sealed, and/or the exhaust fan horsepower was insufficient. There is thus insufficient flow of construction contaminants into the containment area and out the exhaust.
     
  2. [CONSTRUCTION AREA]  The RETURN in this area was NOT BLOCKED.   Combined with the weak negative pressure in the containment area, some exhaust pollutants escape into the return air stream.   Some contaminants also flow through wall cavities and other unplanned pathways to other parts of the building.
     
  3. [OFFICE AREA]  Construction contaminants flow through the return air path and through unplanned pathways into the office.  Occupants will soon complain.

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