On a hot summer day in New York City, walking into a subway station can feel like descending into a sauna, improbably even hotter and muggier than the air outside. Unlike more modern subway stations around the world, New York’s century-old stations lack air conditioning—with staircases open to the outside air, AC would be inefficient and ineffective. And while you can blissfully cool off on the air-conditioned trains, they’re also making the problem worse: Cooling the cars means constantly pumping hot air into the tunnels and stations.
At the East Broadway station on Manhattan’s Lower East Side, the Metropolitan Transportation Authority is launching a pilot to test a potential new solution. Tucked into arches in the ceiling and hidden behind grates, a radiant cooling system will passively pull heat from the air to cool the station with minimal energy use. In the future, the same type of system could send the heat that’s captured to nearby buildings to heat hot water, saving even more energy.
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