The GHE Series Ultra High Temperature Bottom Loading Elevator Furnaces feature lightweight ultra high temperature ceramic fiber insulation system for fast heat up and low BTU input requirements. The load is placed on an elevator that moves up into the bottom of the fixed furnace. Elements on all four sides provide superior uniformity. The GHE Series achieves 3100°F (1700°C) under continuous operation. The insulation system, which is the most fragile and difficult aspect of this type of furnace, is uncompromised in quality and detail. It is guaranteed for one full year, unlike much of the competition where you can expect insulation failure fairly quickly.