5/10/2012 - SPANGDAHLEM AIR BASE, Germany – A 52nd Civil Engineer Squadron Operations Flight heating, ventilation and air conditioning technician flips a breaker switch on an HVAC system to return power to the system in Club Eifel after performing maintenance here May 9. HVAC maintains, repairs and installs heating, cooling and ventilation systems located on Bitburg Annex, Spangdahlem AB and all of its geographically separated units. (U.S. Air Force photo by Airman 1st Class Matthew B. Fredericks/Released)

5/10/2012 - SPANGDAHLEM AIR BASE, Germany – Guido Willwerding, 52nd Civil Engineer Squadron Operations Flight Heating, Ventilation and Air Conditioning Element boiler mechanic, replaces a filter in Club Eifel’s ventilation system here a May 9. HVAC maintains, repairs and installs heating, cooling and ventilation systems located on Bitburg Annex, Spangdahlem AB and all of its geographically separated units. (U.S. Air Force photo by Airman 1st Class Matthew B. Fredericks/Released)

5/10/2012 - SPANGDAHLEM AIR BASE, Germany – Hubert Berger, 52nd Civil Engineer Squadron Operations Flight Heating, Ventilation and Air Conditioning Element boiler mechanic, performs preventative maintenance on an oil burner by cleaning the nozzle and sparkplugs in Bldg. 34 here May 9. HVAC maintains, repairs and installs heating, cooling and ventilation systems located on Bitburg Annex, Spangdahlem AB and all of its geographically separated units. (U.S. Air Force photo by Airman 1st Class Matthew B. Fredericks/Released)

5/10/2012 - SPANGDAHLEM AIR BASE, Germany – Hubert Berger, 52nd Civil Engineer Squadron Operations Flight Heating, Ventilation and Air Conditioning Element boiler mechanic, reattaches the cover on an oil burner after performing biannual cleaning of a boiler in Bldg. 34 here May 9. HVAC maintains, repairs and installs heating, cooling and ventilation systems located on Bitburg Annex, Spangdahlem AB and all of its geographically separated units. (U.S. Air Force photo by Airman 1st Class Matthew B. Fredericks/Released)