Why does New York still run on steam today? And the truth behind it

Beneath Manhattan, an old technology still does a modern job: delivering heat to some of the world's busiest buildings. Why has New York kept its steam network—and how can steam help cool a building in summer? We follow the energy from the plant to the building, explore heat exchangers and absorption cooling, and examine the trade-offs: density, equipment space, maintenance, heat losses, emissions, and future electrification. 00:00 The city beneath the street 01:48 What the white clouds actually mean 02:48 How heat reaches a building 04:41 Why buildings share a heat source 06:58 Manhattan's landmark customers 07:28 Cooling with steam 08:24 Combined heat and power 08:53 Losses, condensate, and maintenance 11:14 Emissions and the next generation 13:38 Why the network survives Generic equipment footage and marked illustrations explain engineering principles; they do not identify a particular New York installation. The named customer list refers to Con Edison's 2022 account. Future decarbonization pathways are discussed as plans, not completed achievements. Subscribe for more stories about old technologies still working inside the modern world. Research: Con Edison (steam supply, steam safety, March 23, 2022 steam-system announcement); US Department of Energy (absorption chillers and steam boiler systems); UK HSE (condensate-induced water hammer). Full source URLs and visual attribution are in 01_Sources_and_Credits.txt. #NewYork #Engineering #Infrastructure