Outdoor air quality in the UK is widely governed by existing regulations. This is in contrast to the quality of air indoors which is managed by prescribing ventilation rates recommended by stakeholders from the building industry. This ventilation approach stems from the 1930s, when Yaglou first raised the importance of minimum building ventilation rates to remove body odour from rooms. The minimum ventilation rates approach may deliver acceptable indoor air quality (IAQ) for standard sized rooms, however, when considering large spaces this approach is insufficient.