City tests heat‑capture subway tech to cool platforms and warm nearby buildings

New York City plans an $800,000 feasibility study to test a Thermal Energy Network that would pull heat from hot subway platforms and store it in nearby municipal buildings for winter use, starting with the Brooklyn Bridge‑City Hall and Chambers Street complex. If viable, design work could begin in 2027, using geothermal boreholes under the Chambers platform to transfer heat to heated city buildings; the effort aims to curb summer heat on platforms (which have topped around 96°F) and reduce the isolation of riders in sweltering stations. The concept, used in hospitals and universities, was previously explored for 168th Street and 181st Street, with city officials framing it as an innovative climate solution for NYC.