How a Rhode Island apartment building for seniors installed 277 heat pumps in just 12 days

Climate tech startup Gradient tells Fast Company exclusively how it retrofitted a Providence apartment building to slash emissions and save energy costs.

[Photo: courtesy Rhode Island Office of Energy Resources]

Carroll Tower, a 194-apartment public housing development in Providence, Rhode Island, was built in 1974. For more than 50 years, residents there relied on electric baseboards for heating and their own window air conditioners, if they had........

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