Mechanical exhaust for central supply locations shall not be more than which maximum rate in cubic feet per minute (cfm)?

Mechanical exhaust for central supply locations shall not be more than which maximum rate in cubic feet per minute (cfm)?

• A. 50 cfm
• B. 72 cfm
• C. 100 cfm
• D. 500 cfm

Answer: (D)

Exhaust in central supply areas is limited to prevent strong drafts and pressure imbalances that could carry contaminants into adjacent spaces or disrupt nearby rooms. Allowing up to 500 cubic feet per minute provides enough ventilation to remove odors, fumes, and moisture without creating excessive negative pressure or energy waste. The lower options (50, 72, 100 cfm) would not provide adequate exhaust for a central supply area, while 500 cfm is the established maximum that keeps airflow effective yet stable.

Exhaust in central supply areas is limited to prevent strong drafts and pressure imbalances that could carry contaminants into adjacent spaces or disrupt nearby rooms. Allowing up to 500 cubic feet per minute provides enough ventilation to remove odors, fumes, and moisture without creating excessive negative pressure or energy waste. The lower options (50, 72, 100 cfm) would not provide adequate exhaust for a central supply area, while 500 cfm is the established maximum that keeps airflow effective yet stable.