The XLG furnaces are multi-purpose gas fired box furnaces. They are highly uniform in temperature and feature accurate digital controls and multiple medium or high velocity "Eclipse Thermjet" proportionally controlled burners with an independent combustion blower. The XLG furnaces can be rated as high as 2400°F (1315ºC) although typical rating is 2000ºF (1093ºC). Connected gas pressure can be as low as 1 PSI. Firing with gas can be more economical than firing with electricity. In addition, the circulation of the hot gases, especially with multiple medium velocity burners, promotes good temperature uniformity without the use of high temperature fans. The burners can be adjusted to run lean to provide a slightly reducing atmosphere (although this can not be precisely controlled.) These furnaces are excellent for ceramics processing and most metallurgical work where precise atmosphere control is not required. Systems can be designed with excess air for high uniformity at low temperatures.