IAQ exposure of sleeping occupants under different residential ventilation configurations

Ever tried coming up with a witty question at a con ference when your baby child kept you up all night? Of all things done at home, sleeping may hav e the largest impact on your economic potential. On average, people spend about 1/3rd of their lifet ime in their bedroom. Most assessment schemes for residential ventilation only look at the total expo sure in all spaces within the dwelling. Physiologic al and sensory response of sleeping persons to IAQ par ameters differs from that in the normal wake state, for which the commonly used performance indi cators are developed. Therefore, the exposure within the dwelling should be broken down into expo sure in living and bedroom areas for performance assessment. This paper assesses the exposure of the occupants o f a tatistically representative dwelling to human bio-effluents and to humidity under 4 differe nt residential ventilation system configurations with multi-zone simulations. Monte Carlo techniques make it possible to assess the sensitivity of the results. The adopted approach varies the most influ e tial boundary conditions such as wind pressure coefficients and occupancy. The results demonstrate that the expected exposure to unacceptable air quality in the bedrooms is up to 16 times higher than that in the rest oft he dwelling. The results will be used as boundary conditions for experimental investigations on the p ysiological response to IAQ exposure.