Every school building after June 28, 1967 erected shall conform to the following minimum requirements for light and ventilation:

1. (a) Every habitable room of school buildings after June 28, 1967 erected shall have one or more windows, unless otherwise specifically provided herein, to afford adequate light and ventilation;
2. (b) Where windows are required such windows shall open on a street, public space, yard, or approved open space that will afford adequate air and light. Required windows shall be so constructed that when fully opened, the total open space shall not be less than one half the required window area;
3. (c) Attics not used for habitational purposes shall have provisions for the emission of excess heat;
4. (d) Skylights, vents, louvers or mechanical ventilation may be substituted for windows when approved by the proper official, provided, adequate natural light and ventilation is provided to meet the requirements of this section:

5. (e) Except as otherwise provided herein, required windows shall have glazed openings of clear glass of area not less than one tenth of the floor area of the room served by them with the following exceptions:

   1. (1) Basements and cellars not used for habitational purposes - windows shall have an area not less than one fiftieth of the floor area served.
   2. (2) Storage rooms - windows shall have an area not less than one twentieth of the floor area served.
   3. (3) Obscure glass, glass blocks and similar glazed panels that admit less light than clear glass shall have area increased to admit amount of light equivalent to the above requirement.
6. (f) Rooms where by reason of use or occupancy, dust fumes, gases, vapors, odors or other hazardous, obnoxious, or injurious impurities exist shall be provided with adequate additional ventilation to insure safe and healthful conditions;
7. (g) An alcove opening off a habitable room may be included as part of that room in determining the window area required provided eighty percent or more of the common wall area provides an unobstructed opening to the alcove;
8. (h) No room that has less than fifty percent of its height above the average adjoining finished grade shall be used as a habitable room;
9. (i) Toilet rooms shall not open directly into a kitchen or room used for the preparation of food;
10. (j) Every toilet room shall have windows as specified for habitable rooms providing in no case less than three square feet of open space, or shall have approved, equivalent mechanical ventilation;
11. (k) Classrooms in school occupancies shall have at least unilateral light. The windows shall be located on the long axis of the room;
12. (l) Where ventilation is provided by mechanical means, fresh air in sufficient quantity to maintain healthful conditions shall be provided to meet the requirements of all State laws. In the absence of such requirements, ventilation at least equivalent to the requirements of this section governing natural ventilation shall be provided;
13. (m) Lavatories, toilets, bathrooms and rest rooms shall be provided with at least two cubic feet of fresh air per minute per square foot of floor area.