Lucifer Furnaces shipped fiveRed Devil dual-chamber, space-saving furnaces to tool rooms across North America, including Canada and Mexico. An upper hardening chamber, which reaches 2200°F, is stacked above a tempering oven that heats to 1200°F. Both chambers are sized at 12 incheshigh x 14 inches wide x 24 inches long and are insulated with 4.5 inches of lightweight firebrick and mineral wool. The firebrick is precision dry fit with staggered seams for reduced heat loss while allowing for thermal expansion,resulting in lower maintenance costs. A general-purpose hardening furnace with a tempering oven isessential fortool rooms across industries in order to perform a variety of heat-treating processes.