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Boston installs window heat pumps in public housing to cut emissions and save money, starting with 100 units for seniors.
Boston is installing window-mounted heat pumps in public housing units to cut emissions and lower energy costs, starting with a 100-unit building for elderly residents.
The small, U-shaped units, made by startup Gradient, fit standard windows, require no major renovations, and can be installed in under an hour using a regular outlet.
Unlike older heaters or air conditioners, they provide both heating and cooling, improving comfort during extreme temperatures.
Funded by a state energy efficiency program, the project supports Mayor Michelle Wu’s 2030 decarbonization goal and is part of a growing trend in cities like New York.
A 2025 study found the pumps save nearly $35,000 per unit over time, and with 60% of U.S. housing units compatible, the technology offers a fast, scalable solution for decarbonizing multifamily buildings.
Boston instala bombas de calor de ventana en viviendas públicas para reducir las emisiones y ahorrar dinero, comenzando con 100 unidades para personas mayores.