U.S. Air Force Staff Sgt. Franklin Sallis, 633rd Civil Engineer Squadron heating and ventilation craftsman, removes a ceiling panel from inside a dormitory kitchen at Langley Air Force Base, Va., Nov. 20, 2014. Sallis was preparing to reprogram the ventilation system’s computer. (U.S. Air Force photo by Airman 1st Class Devin Scott Michaels/Released)

U.S. Air Force Airman 1st Class Ryan Bray, 633rd Civil Engineer Squadron heating and ventilation journeyman, assembles a system they call “Rover” at Langley Air Force Base, Va., Nov. 20, 2014. “Rover” is a computer that reprograms the heating and ventilation systems in the dormitories. (U.S. Air Force photo by Airman 1st Class Devin Scott Michaels/Released)

U.S. Air Force Airman 1st Class Ryan Bray, 633rd Civil Engineer Squadron heating and ventilation journeyman, assembles the connection port to a system they call “Rover” at Langley Air Force Base, Va., Nov. 20, 2014. The Airmen used “Rover” to reset the dormitory room’s ventilation system and change its settings. (U.S. Air Force photo by Airman 1st Class Devin Scott Michaels/Released)