Langley HVAC element turns up the heat
U.S. Air Force Senior Airman Christopher White, 633rd Civil Engineer Squadron heating, ventilation and air conditioning element journeyman, inspects the safety valve of a boiler at Langley Air Force Base, Va., Nov. 8, 2013. The HVAC element oversees operations and repairs to all systems in more than 230 buildings around Langley, ensuring they meet temperature standards to reduce costs. (U.S. Air Force photo by Staff Sgt. Wesley Farnsworth/Released)