The fourth energy plant on campus (District Energy Plant IV – DEP IV) is located near the Arboretum. This 9,830gsf building increases the centralized cooling capacity from 17,900 refrigerated tons (RT) to 21,900 RT, with the capability to expand up to 26,000 RT. DEP IV is connected to the chilled water distribution infrastructure that consists of approximately 15 miles of mains, connecting 58 buildings with environmentally-sensitive and general comfort cooling to 4.9M GSF of research, academic, student housing, CFE Arena, and Athletic space. The overall plant efficiency is .69 kW/ton, which is roughly 17% more efficient than the OUC Lake Nona Chilled Water Plant.