The XLM furnaces are multi-purpose gas fired box furnaces. They are uniform in temperature and feature accurate digital controls and a single proportionally controlled burner with a 50:1 turn down ratio for accurate control. The burner maintains stoichiometric gas/air ratios. The XLM furnaces reach 2100º F (1135ºC). Connected gas pressure can be as low as 4 W.C. Electrical requirements are 120 volts, 15 amps. Firing with gas can be more economical than firing with electricity. In addition, the circulation of the hot gases promotes good temperature uniformity without the use of high temperature fans. The burner 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. They are particularly useful where fumes need to be vented from the furnace, such as in wax burn out work. The single package type burner makes them an economical choice in a small to medium size furnace.