Every bathroom, toilet room and other similar rooms shall have a window area of not less than three square feet. Every bathroom and toilet room shall comply with the light and ventilation requirements for habitable rooms contained in the preceding section, except that no window shall be required in adequately ventilated bathrooms and toilet rooms equipped with an adequate ventilation system which will completely change the air every seven minutes and which is kept in continuous operation when occupied.
(1964 Code, § 12A-18)