Towards Climate-Resilient Office Façades: Integrating PCM-Enhanced Glazing with Dynamic External Louvres Under Current and Future Hot–Arid Climates

Phase-change material (PCM) glazing and dynamic external shading are promoted as sustainable cooling measures, yet they act on the same solar load and are rarely assessed together under a mandatory energy code. This study aims to evaluate and compare the individual and combined performance of PCM glazing and adaptive external louvres in reducing cooling demand in a code-compliant office building under present and future hot–arid climates. The reference case is an SBC 601-compliant west-facing Riyadh office under present and 2080 weather.