(1) Air contaminants released within buildings shall be removed insofar as possible at their points of origin and shall not be permitted to accumulate in concentrations greater than permitted by good engineering practice appropriate to the circumstances such as that described in the publications listed in Article 6.2.1.1.
(2) Systems serving spaces that contain sources of contamination and systems serving other occupied parts of the building but located in or running through spaces that contain sources of contamination shall be designed in such a manner as to prevent the spread of such contamination to other occupied parts of the building.
(3) Heating, ventilating and air-conditioning systems shall be designed to minimize growth and spread of bio-contaminants.
(4) Mechanical rooms containing refrigeration equipment shall be ventilated in accordance with CSA B52, “Mechanical Refrigeration Code”.