Air Quality

Indoor Air Purifiers – Why? (02-02-22)

Cooper and associates probed why people use indoor air purifiers in their homes.  They learned that “One of the most widely available technologies to clean the air in homes of particulate matter of less than 2.5 µm in diameter (PM2.5), known to have negative health impacts, are portable home air purifiers (HAPs). . . . perceptions of IAQ were not correlated with measured high PM2.5 levels; occupants reported the HAPs to have a ‘cooling’ effect, which may explain why the predominant driver of HAP use was thermal comfort, rather than IAQ, in all three cities [where data were collected].

Ventilation Matters (11-05-21)

Joseph Allen, the director of Harvard’s Healthy Buildings program clearly lays out in a recent article in The Atlantic (free at the web address below) why effective workplace ventilation is so important.  His piece includes information that’s crucial for every workplace designer and manager to know and to apply.  For example:  “My team at Harvard recently published research on the health of several hundred office workers around the world for more than a year. We found that people performed better on cognition tests when the ventilation rate in their working environment was higher.

Ventilation and Cognitive Performance (11-04-21)

Research on topics related to workplace ventilation continues.  A Laurent-lead team reports that their goal was “to understand whether cognitive function was associated with real-time indoor concentrations of particulate matter (PM2.5) and carbon dioxide (CO2). We conducted a prospective observational longitudinal study among 302 office workers in urban commercial buildings located in six countries (China, India, Mexico, Thailand, the United States of America, and the United Kingdom). For 12 months, [we] assessed cognitive function. . . .


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