Gas Generators 2005 12,421 h United States, Houston, Texas
Gas Generators 2006 8,038 h United States, Houston, Texas
Gas Generators 2011 16,195 h United States, Ephrata, Pennsylvania
Gas Generators 2016 2,328 h United States, Houston, Texas
Gas Generators 2005 10,821 h United States, Sacramento, California
Gas Generators 2008 United States, Anderson, California