HVAC: Keeping Ellsworth between hot and cold
Senior Airman Julian Hernandez, a 28th Civil Engineer Squadron heating, ventilation and air conditioning journeyman, and Airman 1st Class Michael Schall, a 28th CES HVAC apprentice, use a vice grip and a wrench to fix a fan motor at Ellsworth Air Force Base, S.D., May 3, 2018. The 28th CES HVAC shop is responsible for installing and maintaining all of Ellsworth’s heating, cooling, ventilation and refrigeration equipment. (U.S. Air Force photo by Airman 1st Class Thomas Karol)