Kroon Hall / New Haven, CT

A flagship green building to house environmental studies

Kroon Hall, the new home of Yale School of Forestry and Environmental Studies, opened in January 2009. Awarded LEED® Platinum certification, it achieves energy savings from a host of innovative design elements and technical strategies. A key element of the building's eco‐friendly design is its fenestration. All windows are set deep into the walls to provide natural shading in the summer and are positioned to take advantage of solar heat gain in winter. Unlike many public‐use buildings, many windows are operating. A signaling system is used throughout Kroon Hall, with green‐light indicators alerting a go-ahead to open windows at will; amber lights indicate it would be more energy‐efficient to keep windows closed.

Project Highlights

  • Marvin Tilt‐Turn functionality allows Hopper operation for ventilation and Inswing operation for a larger fresh‐air opening. Tilt‐turns, located on ground floor and upper floors can be locked in an open position to provide ventilation without posing a security risk.
  • The building was sited for best possible solar aspect for its 100‐kilowatt array of photovoltaic collectors; the elongated rectangular building is set into a hill for its insulative properties.
  • Caulk joints were engineered to withstand seismic movements and thermal expansion/contraction.
  • Windows were designed with custom extruded aluminum casings and subsills and a custom cover to conceal the screen‐receiving channel on fixed windows.

Building type

New construction

Units and Applications

Tilt‐Turns, Casements and Awnings
Douglas Fir units on ground floor
Bronze clad throughout


Hopkins Architects, London and Centerbrook Architects, Connecticut


Turner Construction

  Kroon Hall

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