Dilution of contaminated air with uncontaminated air to control airborne health hazards

Dilution of contaminated air with uncontaminated air to control airborne health hazards

• A. General/Dilution Ventilation
• B. Testing and Monitoring Order
• C. Local Exhaust Ventilation (LEV)
• D. Confined Spaces

Answer: (A)

Dilution ventilation works by bringing in uncontaminated outdoor air and mixing it with the contaminated air in the space, then exhausting the mixture. This lowers the overall concentration of airborne hazards and reduces worker exposure. It’s the best fit when contaminants are dispersed throughout a general area or when capturing at the source isn’t practical or cost-effective. It differs from local exhaust ventilation, which removes contaminants right at their source; dilution provides a broad, general control rather than targeted extraction. So, describing the approach as general/dilution ventilation matches the concept of reducing hazard by diluting contaminated air with clean air.

Dilution ventilation works by bringing in uncontaminated outdoor air and mixing it with the contaminated air in the space, then exhausting the mixture. This lowers the overall concentration of airborne hazards and reduces worker exposure. It’s the best fit when contaminants are dispersed throughout a general area or when capturing at the source isn’t practical or cost-effective. It differs from local exhaust ventilation, which removes contaminants right at their source; dilution provides a broad, general control rather than targeted extraction. So, describing the approach as general/dilution ventilation matches the concept of reducing hazard by diluting contaminated air with clean air.