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That is why when we list room sizes, we always base them on their reported CADR and the maximum size when providing at least 4.8 air changes per hour

Cigarette Packet - Black Cat back & slider Carreras, Black Cat Cigarettes, 1930's(?) back of packet & decorative slider 3,753 views 3 faves 0 comments Uploaded on May 17, 2010 Cigarette Packet - Black Cat back & slider Carreras, Black Cat Cigarettes, 1930's(?) back of packet & decorative slider 3,753 views 3 faves 0 comments Uploaded on May 17, 2010

This variation between studies may be due to the different puff routines used to generate the tobacco smoke (HCI vs ISO), aging of smoke particles over the puff routine (4 vs 8 mins) and dilution ratios in the smoke bags (75 vs 33)

Andrew Weil, M.D.