Do overall findings correlate with granular findings? An analysis of factors influencing office workers' thermal comfort and indoor air quality

Purpose – Research shows that occupants are generally satisfied when IEQ parameters fall within standard thresholds. However, granular data often suggest different outcomes. This study explored the impact of IAQ and TC, alongside contextual factors such as office type and working hours, on perceived comfort, satisfaction and productivity in an air-conditioned university office. Design/methodology/approach – The IEQ readings and occupant perceptions were collected and analysed. While annual averages for temperature, CO2 and humidity met recommended levels, the ANOVA revealed significant differences across individual offices and office types, with private offices showing more stable conditions. Findings – The survey results indicated overall satisfaction and productivity, but granular analysis revealed dissatisfaction related to limited control over temperature and ventilation. Worker perceptions did not differ significantly by office type, but longer working hours were associated with higher satisfaction with TC and lower satisfaction with IAQ and control. The regression analysis showed that exceedance frequencies, particularly humidity, had a greater – though statistically insignificant – influence on satisfaction than compliance frequencies. Originality/value – These results suggest that other, unmeasured factors may shape occupant perceptions. Overall, the study demonstrates the value of granular analysis in uncovering nuanced insights into workplace IEQ and supports its use in advancing building performance assessment.