This evening, we were delighted to have Chris Costanza, the architect and primary voice in envisioning the net-zero aspects of the Commons, speak to a roomful of people interested in his take on sustainable design. Chris spoke to a mixed audience of local architects, Harley parents and staff, and other interested folk. He outlined the design-build process undertaken by the architect, the aesthetic designer, and the engineers to balance the compelling interests of beauty, energy efficiency, and budget. Follow up questions centered around specific choices made during the building process, the availability of the energy-efficient systems, and student management of the building through analyzing data. Those who were interested toured the different floors and rooms of the Commons.