Front-loading box furnace with pneumatically operated vertical lift door features a 20 in. x 20 in. x 36 in. (508 x 508 x 915 mm) heated chamber and is rated 75 kW, 480 VAC for operating temperatures up to 2200 F (1205 C). Larger sizes with different chamber sizes also are available. The furnace system includes a complete temperature control system with high-limit controller and recorder. The heavy-duty design ensures maintenance-free operation and is available with electric, natural gas or propane heat source.