No person shall occupy as owner-occupant or let to be occupied any dwelling unit which is improperly ventilated. A dwelling unit is improperly ventilated unless:
(A) Every habitable room shall have a window or windows with a total sash area equal to at least 1/10 of its floor area opening on a street, alley, yard or court open to the sky; such window or windows to be so constructed that at least the top half of the sash area can be opened, except that an approved method of mechanical ventilation may be substituted therefor.
(B) Every bathroom and water closet compartment shall have a window with a minimum sash area of three square feet or shall be ventilated by a mechanical means capable of producing a change of air every 12 minutes.
(C) Every basement, cellar, and crawl space shall have some means of ventilation by providing some windows, openings, vents, or mechanical vents.
('71 Code, § 13-95) (Ord. passed 4-15-80) Penalty, see § 150.999