The COVID-19 pandemic has underscored the urgent need to improve indoor air quality (IAQ), especially in low- and mid-cost housing in tropical regions where ventilation is often inadequate. This research introduces an integrated green wall façade and IoT-based monitoring and control system powered by solar energy. The approach is anchored in the Islamic principle of Sakinah, which promotes peace, balance, and spiritual well-being. Objectives include (i) to identify the performance of existing IoT-based systems for indoor air quality (IAQ) monitoring and control (ii) to identify suitable plant species for green wall façades in tropical indoor environments and (iii) to explore the energy efficiency and cost-effectiveness of the green façade system powered by renewable energy sources. A mixed-method design involving a case study, observational analysis, and a prototype test cabin at Universiti Sains Islam Malaysia demonstrates the system’s ability to reduce CO₂ and PM concentrations, lower energy use (up to 53.4 kWh/month), and achieve monthly cost savings (< MYR 20). The findings reveal the potential of integrated smart façades to enhance health, sustainability, and user well-being in alignment with spiritual values, offering a scalable model for resilient post-pandemic residential design.

Green Wall, IoT, Indoor Air Quality, Sustainable Design, Sakinah Living, Energy Efficiency, Tropical Housing