The Air-Conditioned Century episode artwork

EPISODE · Jun 3, 2026 · 51 MIN

The Air-Conditioned Century

from David's NotebookLM Audio Collection · host David Weissman

How did humanity learn to manufacture cool air, and how did that change the course of American life? In this Deep Dive, we trace the fascinating history of air conditioning from early refrigeration experiments and John Gorrie’s medical ice machine to Willis Carrier’s breakthrough in humidity control and the rise of modern HVAC. Along the way, we unpack the thermodynamics of cooling, the science of heat transfer and dehumidification, and the surprising ways air conditioning transformed architecture, industry, summer moviegoing, suburban growth, and the political power of the American Sun Belt. It is a story of engineering, comfort, climate, and how one invisible technology helped redraw the map of the United States.

How did humanity learn to manufacture cool air, and how did that change the course of American life? In this Deep Dive, we trace the fascinating history of air conditioning from early refrigeration experiments and John Gorrie’s medical ice machine to Willis Carrier’s breakthrough in humidity control and the rise of modern HVAC. Along the way, we unpack the thermodynamics of cooling, the science of heat transfer and dehumidification, and the surprising ways air conditioning transformed architecture, industry, summer moviegoing, suburban growth, and the political power of the American Sun Belt. It is a story of engineering, comfort, climate, and how one invisible technology helped redraw the map of the United States.

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The Air-Conditioned Century

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This episode is 51 minutes long.

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This episode was published on June 3, 2026.

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How did humanity learn to manufacture cool air, and how did that change the course of American life? In this Deep Dive, we trace the fascinating history of air conditioning from early refrigeration experiments and John Gorrie’s medical ice machine...

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