Situated on the roof of Nanticoke Hall, evacuated tube solar collectors harness free sunshine and convert the sun's energy into hot water for use by the building's residents. The system is comprised of thick borosilicate glass outer tubes and thinner glass inner tubes. The air has been removed, or "evacuated" from the space between the two tubes. This vacuum acts as an insulator, reducing heat loss to the surrounding atmosphere. Nanticoke Hall's south facing roof surface provides the ideal exposure to the sun's rays.