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. Author manuscript; available in PMC: 2012 Sep 9.
Published in final edited form as: Risk Anal. 2010 Oct 29;31(4):578–591. doi: 10.1111/j.1539-6924.2010.01523.x

Table V.

Estimated In-vehicle PM2.5 Concentrations for Selected ETS Exposure Scenariosa

Speed
(mph)		 Windows Ventilation
System		 Air Exchange Ratesb
ACH (h−1)		 Predicted PM2.5
Concentrationsc(μg/m3)
20 One fully Open AC Off 78.6 8
60 One Open 3 inches AC Off 56.4 11
60 All Closed AC Regular 38.6 16
20 One Open 3 inches AC Off 20.9 29
0 (parked) One Fully Open AC Off 19.2 31
60 All Closed AC Max 5.1 118
20 All Closed AC Max 3.0 201
a

Simulation assumptions: V = 4 m3, Ecig = 13800 μg/cig, Rcig = 1.05 cig/h, t = 10 min, T = 60 min, and ACH as shown.

b

Air exchange rates were obtain from Ott et al. (2008).(43)

c

PM2.5 concentrations are calculated based on the mass balance Equation (3).