A Case Study on Occupants' Thermal and Acoustic Environmental Experiences in an Open-Plan Office : Considering Physical and Non-Physical Factors

Purpose: This study aimed to explore how occupants in an open-plan office perceived the indoor environment. The research sought to uncover the underlying mechanisms and processes that influence subjective comfort through the application of the stress theory model, categorizing experiences into constructs such as stressors, appraisals, coping strategies, and effects. Methods: A mixed-method approach was employed, combining both objective and subjective data collection. Indoor environmental parameters, including sound pressure levels, air temperature, and relative humidity, were measured over 16 days in an open-plan office. Additionally, in-depth interviews were conducted with the office employees to gather qualitative insights into their perceptions of the indoor environment. The data were analyzed using the theoretical model of psychological stress to identify key factors and mechanisms impacting occupants' comfort. Results: The study identified that employees' perceptions of the indoor environment in the open-plan office were influenced by a complex interplay of physical and non-physical factors. Physical elements such as noise, temperature, and humidity, along with non-physical factors, including personal stressors, individual appraisals, and coping strategies, were found to affect subjective comfort levels. Intervening and contextual conditions, such as organizational culture and social dynamics, also played a significant role in shaping occupants' experiences. The findings suggested that both physical and non-physical factors must be considered to effectively enhance occupant comfort in open-plan office settings.