Feb. 10: Study Done on Pollutants from Rooftop Stacks

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IRSST researchers conducted a wind tunnel study of the effects of adjacent buildings on the dispersion of pollutants from rooftop stacks. These pollutants can be a health hazard for the occupants of the emitting building and neighbouring buildings if they’re reintroduced through fresh air intakes or manage to get in through openings. The study found that the presence of taller buildings downstream prevented the exhaust plume from dispersing, which increased pollution emission concentrations on the roof and on the leeward wall of the emitting building.