Section 27-766. Ventilation of rooms or spaces with excessive temperatures, strong odors, toxic substances, or airborne irritants

In these rooms or  spaces,  prevention  of  all  of  the  following  conditions  shall   be
  considered in the design and installation of a ventilating system:
    (a) Excessive temperatures that may be detrimental to the occupants.
    (b) The danger of large concentrations of toxic substances in the air.
    (c)  The  danger  of  large  concentrations  of  airborne irritants an
  impurities, such as steam, gases, vapor, and dust, that may be injurious
  to health.
    Where the  exhausted  air  may  contain  toxic  substances  or  strong
  objectional  odors,  the  exhaust system shall be independent of exhaust
  systems serving other parts of the building.