Mathematical modeling of chemically reactive pollutants in indoor air.
A general mathematical model is presented for predicting 
the concentrations of chemically reactive compounds in indoor air. The model accounts for the effects of ventilation, filtration, heterogeneous removal, direct 
emission, and photolytic and thermal chemical reactions. 
The model is applied to the induction of photochemically 
reactive pollutants into a museum gallery, and the predicted 
NO, NO_x-NO, and O_3 concentrations are compared to measured data. The model predicts substantial production 
of several species due to chemical reaction, including 
HNO_2, HNO_3, NO_3, and N_2O_5. Circumstances in which homogeneous chemistry may assume particular importance 
are identified and include buildings with glass walls, indoor combustion sources, and direct emission of olefins.