Winthrop Center boasts 75,000 m2 (812,000 square feet) of Class A office space and 47,000 m2 (510,000 square feet) of residential space, and it is a low-carbon and energy-efficient building. A typical Class A building in Boston’s existing stock uses 150% more energy than Winthrop Center’s office space.
In addition to delivering dramatic energy savings through a well-insulated building façade, air-tight exterior envelope, and advanced energy recovery ventilation (ERV) system, Winthrop Center’s Passive House office space creates a comfortable, healthy indoor environment for building occupants, bringing in 30-50% more fresh air than a standard building of this type.
Holcim’s expertise in creating sustainable building solutions played an important role in this project: on average, up to 25% of a typical building’s heat loss is through the roof. For the rest of the building, Winthrop Center incorporates a well-insulated façade and an air-tight exterior building envelope.
Winthrop Center is unique: It is the most energy-efficient large-scale building ever built in a cold climate, where the Passive House approach is critically important to significantly lower the heating demand in the winter and cooling demand in the summer. As an iconic building that is more sustainable in use than other similarly sized buildings, it stands out as a showcase project for the Passive House industry and sets a high standard for future projects.
The architects involved in the project believe that, in a few years, all buildings will be required to adopt the energy saving principles and achieve the high level of performance of Passive House.