Status - ventilation models for indoor air quality.

As measurements are essential for performance assessment, models are essential for design. Both empirical and rational models are being developed for predicting the effectiveness of ventilation for acceptable indoor air quality. In this status report, models for contaminant generation rates, and dilution and removal control are introduced through a simple, one-compartment model. Models for predicting air quality within and between occupied spaces are then reviewed based upon assumptions of uniform and non-uniform mixing, including respiration requirements, dynamics of window and doors, pressurization control, and thermal interactions. Systems models are then reviewed including psychrometrics, dilution and removal control, and optimal control strategies. From this status review, areas for further development are identified.