the house, a , 26-floor residential building, was designed by handel architects, who also created each unit's furnishings. the narrow tower contains of floor area, comprising 350 units. upon its completion, the house was proposed to be the largest and tallest energy-efficient "passive house" in the world. as it conforms with the passive house institute's rigorous standards, its energy output would be 60% to 70% less than if it had been built like a regular, non-energy-efficient high-rise. the house's outer walls include insulated panels, which would retain annually of carbon dioxide. the house contains microapartments as well as typical one-, two-, and three-bedroom apartments leased to students at less than market rate.