@article{27344,
  keywords = {Indoor exposure, Black carbon, I/O Ratio, Infiltration Factor, Woodsmoke Particles},
  author = {Tracy L Thatcher and Thomas W Kirchstetter and Christopher J Malejan and Courtney E Ward},
  title = {Infiltration of Black Carbon Particles from Residential Woodsmoke into Nearby Homes},
  abstract = {<p>In many communities, residential wood burning is the source of a significant fraction of wintertime PM2.5 and produces exposures to nearby residents inside their homes. To evaluate the magnitude of this effect, black carbon particles were measured as a proxy for woodsmoke indoors and outdoors in a community where residential woodsmoke is the only significant particle source. Thirteen indoor/outdoor measurement pairs were obtained at 4 different residences and showed an average indoor/outdoor concentration ratio of 0.78 ± 0.21 for residences without indoor generation. In addition, a time dependent mass balance model was used in conjunction with aethalometer measurements taken over 16 nights at a single residence to estimate an average air exchange rate of 0.26 ± 0.08 h<sup>−1</sup>, an average deposition loss rate of 0.08 ± 0.03 h<sup>−1</sup>, and an average penetration factor of 0.97 ± 0.02. Using a mechanistic approach which utilizes these average values in a steady state model, the predicted average infiltration factor was 0.74 for the residence studied. The high values for both measured I/O ratio and modeled infiltration factor show that residential environments provide inhabitants with relatively little protection from recently generated<br />wood smoke particles.</p>},
  year = {2014},
  journal = {Open Journal of Air Pollution},
  volume = {03},
  pages = {111 - 120},
  month = {11/2014},
  issn = {2169-2653},
  doi = {10.4236/ojap.2014.34011},
}