HVAC
U.S. Air Force Airman 1st Class Jedadiah Floyd, 31st Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration technician, walks through a dormitory mechanical room, July 29, 2015, at Aviano Air Base, Italy. Over the summer months, the HVAC shop receives more than 150 work orders a week. (U.S. Air Force photo by Airman 1st Class Deana Heitzman/Released)