Abstract
In addition, the incursion of outdoor pollutants into the interior through a ventilation opening has been recognized as a serious threat to indoor air quality (IAQ). This article presents on-site measurements of the ventilation performance and IAQ in four high-rise residential rooms in Hong Kong. Key parameters including the air changes per hour, respirable suspended particulate matters (PM: PM10 and PM2.5), and total volatile organic compounds were continuously recorded over a specified period. A comparison of cases with floor-extended and window-like openings is made. The results indicate that single-sided ventilation performs well regardless of the orientation of the apartment room and the configuration of the opening. Previous empirical models based on single-room buildings are not reliable in determining the ventilation rate of high-rise buildings. The measurements reported here also identify an important route for the incursion of outdoor pollutants, namely the downward re-entry of aerosol particles from an upper unit to a lower unit in the same building. A combination of gravitational and wind effects means this downward transport route significantly increases the PM10 and PM2.5 concentrations in the lower room.
Original language | English |
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Pages (from-to) | 214-224 |
Number of pages | 11 |
Journal | Indoor and Built Environment |
Volume | 24 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jan 2015 |
Keywords
- ACH
- High-rise buildings
- On-site measurement
- PM10
- PM2.5
ASJC Scopus subject areas
- Public Health, Environmental and Occupational Health