Assessment of building occupants' perception of indoor thermal comfort in Dhaka

This study investigates the perceptions of occupants regarding thermal comfort in Dhaka, characterized by high temperatures and tropical wet and dry climate. The primary objectives are to identify factors influencing indoor thermal comfort and examine the effects of ventilation on occupants' health. Surveys were conducted in the living rooms of thirty residential units, measuring room temperature using thermometers and gathering occupant feedback. The findings reveal that building design factors, including form, orientation, the ratio of openings to floor area, landscaping, and fenestration, significantly influence average indoor temperatures. Poor ventilation and inadequate thermal comfort were linked to various health issues, including insomnia, fatigue, boredom, headaches, reduced cognitive alertness, and asthma. These conditions highlight the pressing need for improved building designs to mitigate adverse health effects and promote well-being. The study recommends involving building professionals in the planning, design, and construction processes to incorporate effective strategies such as optimal building orientation, appropriate ratios of openings to floor area, and enhanced landscaping. These measures can improve ventilation and maintain comfortable indoor temperatures, ensuring healthier living environments for urban residents. Addressing these factors is essential for creating thermally comfortable residential spaces in Dhaka, where climatic challenges demand tailored architectural and environmental interventions.