TOP: Senior Airman Payton Jones, a 5th Civil Engineer Squadron heating, ventilation, air conditioning and refrigeration specialist, puts on an Arc Flash suit while Aaron Puuri, an HVAC maintenance mechanic, prepares the suit’s face mask at the Flight Simulation Training building on Minot Air Force Base on Feb. 19. U.S. Air Force photo by Senior Airman Kendra Ransum.

From the left, Airman 1st Class Erik Cruz, Staff Sgt. Micheal Villarreal and Master Sgt. Matthew Yordt, all heating, ventilation, air conditioning and refrigeration specialists assigned to the 5th Civil Engineer Squadron, use a voltmeter on an air switch to troubleshoot a furnace at Minot Air Force Base on Feb. 19. U.S. Air Force photo by Senior Airman Kendra Ransum.