"A perforated surface is not simply porous; it is calibrated. The proportion of solid to void, often falling between 30 and 50 percent, is tuned to allow air to pass while filtering sunlight."
"Studies have shown that such configurations can improve ventilation rates by up to 60 percent, producing a perceptible cooling effect even in still air."
"At the same time, the depth and angle of each aperture reduce direct solar radiation, cutting heat gain by as much as 60 to 80 percent, as documented in research from Indian research organizations."
Perforated screens, such as jaalis and mashrabiyas, are integral to buildings in the Indian subcontinent and Islamic world. They serve as walls that regulate heat and airflow, rather than just decorative elements. These screens are designed with a specific ratio of solid to void, enhancing ventilation and reducing solar heat gain significantly. Research indicates that they can improve ventilation rates by up to 60% and cut heat gain by 60 to 80%. Their design is a sophisticated response to environmental conditions, demonstrating their functional importance in architecture.
Read at ArchDaily
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