I tried to look where the claim "Research shows that nearly 70 percent of chimney smoke reenters nearby buildings." comes from as I find it interesting. In the

I tried to look where the claim "Research shows that nearly 70 percent of chimney smoke reenters nearby buildings." comes from as I find it interesting. In the "woodsmoke health effects" paper it references this: Pierson, W. E., Koenig, J. Q., and Bardana, E. J., 1989. Potential adverse health effects of wood smoke. West J. Med. 151: 339-342. which is found here: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1026893/pdf/westjmed00121-0093.pdf http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1026893/pdf/west... And it says: > Also, about 70% of the outdoor wood smoke reenters the house (T. V. Larson, PhD, University of Washington, Department of Civil Engineering, unpublished data). First, the article is from 1989 and it's not known when the T.V. Larsons data is collected. Also wouldn't for example the density of the houses or the type of the houses and their ventilation and filtering affect this result? How much? Secondly somehow the original article mentions that the smoke reenters the house, which I understand is the same house with the stove/fireplace, but in the "woodsmoke health effects" paper it has transformed to "can actually reenter the home and neighborhood dwellings"?