Exhaust fans for a public bathroom shall be sized at how many cfm per flushing unit if the fan is continuous?

The correct answer is based on the National Engineered Design Standards, which typically dictate that exhaust fans in public bathrooms should be sized at a minimum airflow rate to ensure effective ventilation and air quality control. A continuous exhaust fan should provide at least 50 cubic feet per minute (cfm) per flushing unit to adequately remove moisture, odors, and contaminants from the air. This criterion is established to ensure that adequate ventilation is maintained throughout the facility, promoting a healthier environment for users. Using this standard helps to prevent issues related to stagnant air, excess humidity, and unpleasant odors, which are common in high-usage public restrooms. Therefore, sizing the fan at this specific rate supports compliance with both health regulations and comfort standards within public facilities.