Indoor environmental quality (IEQ) and its impact on job satisfaction in green buildings: a multi-factor analysis

Abstract

This study explores the impact of LEED-certified building interiors on employee job satisfaction industry in Sri Lanka, with a focus on the MAS Thurulie factory. Adopting a mixed-methods approach, the research integrates quantitative and qualitative techniques to assess how specific green building elements lighting, ventilation, and thermal comfort affect job satisfaction. In the quantitative component, a survey of 180 employees was conducted, utilizing the Employee Net Promoter Score (eNPS), Job Satisfaction Survey (JSS), and specific scales for lighting, ventilation, and thermal comfort. The survey data were analyzed using SPSS, with descriptive statistics revealing an average eNPS score of 30, indicating a favorable overall employee sentiment. Correlation and regression analyses showed significant positive relationships between job satisfaction and the quality of lighting (r = 0.45, p < 0.01), ventilation (r = 0.52, p < 0.01), and thermal comfort (r = 0.48, p < 0.01). Structural Equation Modeling confirmed that these environmental factors collectively accounted for 35% of the variance in job satisfaction. The qualitative component involved semi-structured interviews with 15 employees, 3 supervisors, and 3 design persons. Thematic analysis of interview data highlighted that improved lighting, effective ventilation, and optimal thermal comfort were key factors enhancing job satisfaction. Specific themes included a reported 20% increase in perceived comfort and a 15% improvement in overall satisfaction related to workplace environment. This research contributes to the literature by highlighting the specific ways in which LEED-certified interiors impact job satisfaction in a developing country context. The results offer practical recommendations for optimizing green building design to enhance employee well-being and productivity, with implications for both organizational strategies and broader sustainable building practices.