Boston skyscraper named world’s biggest ​‘Passive House’ office

Alison F. Takemura - Click Here

A new Boston skyscraper has a climate-friendly claim to fame. Last week, it became the largest office space in the world certified to the extremely energy-efficient ​Passive House” standards — and the first skyscraper in the U.S. to earn the label.

The 812,000-square-foot area for offices at the Winthrop Center, a mixed-use commercial and residential building, requires significantly less energy than similar spaces. Comparable buildings in Boston consume 150% more energy than Winthrop Center’s office space, according to the developer Millennium Partners.

To achieve Passive House performance, the design utilizes high-performing insulation, triple-pane windows and other construction techniques that improve airtightness and minimize thermal-energy losses. The nonprofit research organization Passive House Institute in Germany verified the building’s performance.

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