the main academic building of phase 1 is called the bloomberg center. the $115 million, five-story structure was designed by morphosis architects. it was designed as "net-zero energy" building, wherein the building only uses the power it creates on its own. the city's first net-zero building, bloomberg center was built with energy-efficiency standards that were more stringent than the leadership in energy and environmental design standards. as part of its net-zero-energy drive, the bloomberg center contains a "lilypad" array of 1,465 solar panels on its roof; 80 geothermal wells to draw heat from the ground; color-changing black-and-white discs on its facade that could either absorb or reflect heat; and a rainwater tank with a capacity of . for maximum solar coverage, the taller buildings such as the house would be located to the north of the bloomberg center so that the taller buildings' shadows, which face north, would not block the panels. its interior contains a short atrium cutting through the center of the building, aligning with 57th street across the east river from roosevelt island's western shore. upon its opening, the bloomberg center hosted several works of art, including the goldwater hospital's wpa murals and two new works by michael riedel and matthew ritchie.