For passive cooling, which factor should be maximized for improved efficiency?

In the context of passive cooling, maximizing ceiling height is crucial for improved efficiency. A higher ceiling allows for better air stratification, which means that warmer air, being less dense, can rise towards the ceiling, while cooler air remains closer to the ground. This natural process facilitates better airflow and thermal comfort within a space without relying on mechanical cooling systems.

By increasing the ceiling height, the effectiveness of natural ventilation is enhanced, as it creates a larger space for air circulation and can lead to a more comfortable indoor environment. The additional vertical space allows for more significant thermal mass effects, where materials can absorb heat during the day and release it at night, further aiding in temperature regulation without requiring energy expenditure.

The other factors, such as increasing or decreasing the slope of the roof or floor area, do not directly contribute to the efficacy of passive cooling in the same way ceiling height does. While they may affect aspects like light penetration or potential space use, they do not enhance air movement and thermal dynamics as effectively as a higher ceiling can.