HVAC technicians endure the heat to keep base cool
SOUTHWEST ASIA – Airman 1st Class David Yarolimek, 379th Expeditionary Civil Engineer Squadron heating, ventilation, and air conditioning technician and native of St. Augustine, Fla., closes an air conditioning unit panel here Feb. 7, 2012. HVAC technicians are trained in air conditioning unit maintenance, new unit installation, and system repair. (U.S. Air Force photo/Staff Sgt. Nathanael Callon)