Section R303.3, Bathrooms, of the IRC, is hereby amended by deleting said section and inserting in lieu thereof the following section and also by adding the following exception:
Section R303.3 Bathrooms Bathrooms shall be provided with a mechanical ventilation system. The minimum ventilation rates shall be 50 cfm for intermittent ventilation or 20 cfm for continuous ventilation. Ventilation air from the space shall be exhausted directly to the outside.
Exception: Toilet rooms containing only a water closet and/or lavatory may be provided with a recirculating fan.