Improving Indoor Air Quality and HVAC Performance Using the PDCA Methodology

Abstract

Improving indoor air quality (IAQ) is essential for enhancing occupant health, productivity, and building performance. This project applied the PDCA (Plan-Do-Check-Act) methodology to optimize HVAC systems and reduce harmful air pollutants. Key improvements included lowering CO₂ levels, reducing PM2.5 and VOC concentrations, optimizing relative humidity, and refining temperature control. These changes align with ASHRAE 62.1 standards and contribute to energy efficiency and sustainability. The methodology ensures continuous improvement through iterative evaluation and adjustment. The results demonstrate measurable benefits in health outcomes, cognitive performance, and operational efficiency, making this approach a practical framework for IAQ enhancement in commercial and institutional buildings. Key Terms ⎯ Air Quality, HVAC Optimization, PDCA Cycle, Sustainability.