@inproceedings{bibcite_36893,
  keywords = {Particles, Air Quality, Indoor-Outdoor Ratio, Homes},
  author = {Constanza Molina and Congsyuan Chen and Benjamin Jones and Iain S Walker and Hector Jorquera},
  title = {Exploring the Variability of Indoor-Outdoor Ratio of Particle Matter in Santiago, Chile},
  abstract = {<p>Air pollution is a leading global cause of morbidity and mortality, and indoor environments play an important role in personal<br>exposure because people spend more of their time indoors. Outdoor monitoring data is frequently used to assess health impacts<br>{\textendash}using metrics such as the Disability-Adjusted Life Year (DALY)- but it may not closely represent indoor exposures influenced<br>by building characteristics, ventilation practices, and occupant activities. In fact, personal exposures may align more closely<br>with indoor exposures, indicating that current health impact analyses should account for indoor air quality. This study takes a<br>top-down approach using indoor-outdoor (I/O) ratios to examine exposure variability and influencing factors. Indoor<br>concentrations were measured every ten minutes in eight dwellings in Santiago (Chile) in 2023 and 2024, and were compared<br>to hourly outdoor data from nearby government monitoring stations. The analysis shows spatial and temporal variations in<br>I/O ratios, which were then grouped by shared factors such as building characteristics, dwelling profiles, and occupant<br>activities. Ratios often exceeded unity during the heating season, mainly due to combustion-based heating systems, including<br>gas and kerosene heaters. These findings emphasize the important role of structural and behavioral factors in shaping indoor<br>air quality. This research highlights the limitations of using outdoor air quality data for assessing health impacts because it<br>does not capture the variable and prolonged exposures experienced indoors. The findings enhance our understanding of<br>particle dynamics in urban housing and reinforce the need to consider indoor air pollution in public health policy.</p>},
  year = {2025},
  booktitle = {IEQ 2025 Conference},
  journal = {IEQ 2025 Conference},
  series = {IEQ 2025 Conference},
  month = {05/11/2025},
  institution = {ASHRAE},
  publisher = {ASHRAE},
  url = {https://doi.org/10.63044/eq25mo70},
  doi = {10.63044/eq25mo70},
}