Hospital Environmental Appraisal for Thermal-comfort (HEAT) is an evidence-based design tool created based on 52 pieces of research evidence that seeks to enhance decision-making related to patient thermal comfort (PTC) issues in inpatient wards. The framework of the tool is based on eight essential design domains that are; design flexibility, coordination, thermal adaptation, temperature ranges, activity level, external shading, building monitoring and airstream. Eight non-technical statements are driven from design domains to address common PTC issues. Hence, each statement provides a list of design recommendations to inform a variety of solutions that would be considered at several design phases.