Every habitable room shall have at least one window or skylight which can easily be opened, or such other device as will adequately ventilate the room. The total of openable window area in every habitable room shall be equal to at least 45% of the minimum window area size or minimum skylight-type window size, as required in this section except where there is supplied some other device affording adequate ventilation and approved by the Enforcement Officer.
('75 Code, § 13-88) Penalty, see § 152.99