Adapting housing design tools for indoor thermal comfort to changing climates

Heat-related fatalities are rising globally, driven by poorly designed housing and the limited use of climate adaptation strategies, particularly in low-income countries. Current housing design guidelines often rely on outdated climate classifications, reducing their effectiveness in future climate conditions. This study evaluates four carefully selected housing design tools in terms of their ability to improve thermal comfort in low-cost housing under future climate scenarios. The evaluation is based on a weighted multi-criteria assessment incorporating five key factors: future climate adaptability, guideline accuracy, user-friendliness, accessibility, and adaptability to user needs. Normalised relevance scores were obtained via quantitative ratings of the criteria by 32 international shelter, settlement, and construction professionals. The assessment results confirm the limited future climate sensitivity of the tools and variation in the other criteria. Tools to support indoor thermal comfort are suggested to integrate identified strengths with interactive reliable climate projections. Further tool development should support neighbourhood-wide resilience, incorporating passive design and energy efficiency principles, as well as local sustainable building practices, and improve accessibility for diverse stakeholders. Tool improvements are essential to facilitate climate-adaptive housing design in low-resource areas.