This document is the final report on a field assessment of proposed revisions to Article 9.32 of the Ontario Building Code. In the fall of 1992, Buchan, Lawton, Parent Ltd. was commissioned by the Ontario New Home Warranty Program, on behalf of a group of Project Partners comprised of government agencies and industry groups1, in order to undertake a field assessment of the residential construction industry's ability to install mechanical ventilation systems for houses to meet the requirements of the proposed Revisions.
Airborne microorganism contamination was investigated in naturally and mechanically ventilated buildings. Air was sampled with SAS system and cultured on general media for total count and on media for fungi; data were related to other indoor contaminants and to microclimatic parameters. Comparison of winter versus summer microorganism concentrations was not significant. No major difference of detected species was observed between naturally and mechanically ventilated buildings.
Many modern office and residential buildings in Sweden include an atrium. The atria are often mechanically ventilated and sometimes they are heated. Very little is know about the ventilation and air infiltration in built atria. These issues were examined in an apartment building with a non-heated and mechanically ventilated atrium, built in 1986 in Sweden. The ventilation of the atrium is coupled to the apartments.
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