Heating, ventilation, air conditioning, and refrigeration Airmen maintain heating and cooling on base

Senior Airman Tristan Miles, a 319th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration apprentice unscrews a water boiler June 20, 2018, on Grand Forks Air Force Base, North Dakota. Miles said that they open the front and back ends of the water boiler to check for any possible damage or overflow. (U.S. Air Force photo by Airman 1st Class Melody Wolff)

PHOTO BY: Airman 1st Class Melody K. Wolff
VIRIN: 200618-F-VG991-1033.JPG
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