"apassive cooling and ventilation system using underground air tunnels. It works by drawing in fresh air through intake vents positioned above ground, which then travels through buried pipes, cooling naturally as it moves through the earth. By the time the air reaches the interior of the building, it is significantly cooler, providing natural ventilation and temperature regulation. Warmer air inside rises and exits through upper vents, creating a continuous airflow cycle that replaces hot air with cool air. The sectional view highlights how the buried piping helps moderate the incoming air temperature by leveraging the earth’s stable underground temperatures. This system is energy-efficient, relying solely on natural airflow principles without mechanical components. Such techniques are commonly used in passive house designs, root cellars, and earth-sheltered homes to enhance indoor comfort while reducing energy consumption.
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