ABSTRACT
This chapter focuses on the use of airflow and contaminant models, and integrated thermal and airflow models. The energy used to supply and condition fresh air to a building can be a significant contribution to the carbon footprint of a building, while the resultant ventilation rate along with the strength of pollutant sources will determine the level of indoor air quality (IAQ). Ventilation modelling provides a valuable theoretical method for assessing the performance of domestic ventilation systems, both in terms of ventilation rates achieved and the resultant indoor air quality. For these models to become more widely used accepted as a reliable method of assessing IAQ and ventilation rates in buildings there is a need for continued testing and validation. Demand controlled ventilation, which aims to reduce energy consumption by matching the ventilation rate to the actual need, by its very definition assumes that that ventilation rates will, vary according to the conditions within a building within a specific time.
