The Economic Times

Hidden pipes, sandstone walls: How our ancestors kept interiors cool without AC, fan

Ancient Indian architecture employed ingenious, nature-based cooling systems long before modern technology. Structures like Lotus Mahal and Agra Fort utilized water flow through pipes and channels, alongside strategic airflow, to maintain comfortable indoor temperatures. These designs, featuring thick walls, perforated screens, and rainwater harvesting, demonstrate a profound understanding of sustainable climate control.