Both our GT and AM models are designed for use with inert protective atmospheres. GT Models are designed with a continuously welded furnace shell and gasketed door for operation with a positive flow of inert atmosphere. GT Models are best suited for constant operation to maintain a dry refractory environment in the work area to minimize oxidation on workloads. GT Models are a less expensive alternative compared to AM Models

AM Models are equipped with an alloy muffle (retort) which separates the refractory and heating elements from the workload and atmosphere to minimize scale and oxidation on most tool steels. The design of the AM Models achieves lower dew points, reduced atmosphere consumption and allow shorter purge times.