Evaluating Energy Performance of Windows in High-Rise Residential Buildings: A Thermal and Statistical Analysis

Windows, accounting for 45% of overall heat loss, significantly influence a building’s energy performance. Evaluating window energy performance in existing buildings is therefore essential. This study aimed to assess the energy performance of windows to determine whether replacement is necessary. The assessment considered factors such as window location, height, orientation, and weather conditions in a high-rise residential building. A thermal camera was utilized for measurements, and statistical analyses were conducted on the collected data. Results indicated significant performance variations across building sides and floors, with differences at the 0.05 significance level attributed to temperature, wind speed, and direction. Findings suggest that implementing more efficient windows on upper floors—particularly from the fourth floor upward—is advantageous. Additionally, accounting for dominant wind speed and direction is crucial for optimizing window design and configuration.