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TB Questions and Answers - Section 3a

Containment Dilution By Introducing Air From Other Sources

 

Q: How does dilution work?

A: It simply reduces the concentration of contaminants in a space by introducing cleaner air supplied from other areas within the building or from outside.

Q: Won't this practice allow contaminated air to flow to other areas?

A: If the room is kept under negative pressure by exhausting more air from the space than that which is being introduced into the space, then most of the contaminants should either be exhausted from the space or contained within it.

Q: What is the removal process?

A: When the contaminant is diluted within the space by evacuating or exhausting from the contaminated space either directly to the outside or through a HEPA filter.

Q: Should air contaminated by TB be exhausted directly outside?

A: Since TB is spread via the airborne route, it is advisable to research any existing federal, state, or local codes which regulate environmental discharge since people and or animals could be put at risk. Also, when contaminated air is being exhausted great care should be taken to insure that the exhaust is ample distance away from any other air intakes or adjoining buildings.

Q: Are there any other concerns related to the total exhaust of room air?

A: The initial cost of breaking through outside walls, electrical wiring, or replacing windows makes the modification both permanent and costly. Exhausting already heated or cooled air from the space will greatly add to energy and fuel costs on an ongoing basis. The tempered air which is removed from the space will greatly add to energy and fuel costs on an ongoing basis. The tempered air which is removed from the space must be replaced with outside or makeup air which must be treated to match the design conditions of the environment. Also, by making this a permanent modification, you become limited to which areas may be utilized to treat TB patients.

 

 

-End of Section 3a-

Next- Section 3b

 

 

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