Brian Jarvis and Robert DeRuyter inspect an environmental control unit used to cool transient personnel tents Sept. 29, 2011, at an undisclosed location in Southwest Asia. Jarvis is exploring the possibility of being able to reduce the number of ECUs by one third simply by making the remaining units run more efficiently. Jarvis is the U.S. Air Forces Central Command energy manager, and DeRuyter is an air conditioning service technician assigned to the 379th Expeditionary Civil Engineer Squadron. (U.S. Air Force photo/Master Sgt. Gary J. Rihn)
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Master Sergeant Gary J. Rihn
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