Why a 4-Story-Deep Garage Beats a 20th-Floor Concrete Core
A listener wrote in with two building-temperature puzzles that seem to contradict each other: a parking garage four floors underground in a hot country during wartime was unbearably hot, while a concrete core on the twentieth floor of a residential tower—buried inside the building, no sunlight—roasts every summer. What actually determines temperature at different heights and depths in a building? We kill the "closer to the Earth's core" theory with arithmetic (the geothermal gradient delivers less than half a degree over four floors), then work through what's really going on: mean annual…
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