No. 1039 is a 2000°F (1093°C) inert-atmosphere, heavy-duty furnace from Grieve that can be used for heat treating turbine components. Workspace dimensions measure 36 inches wide x 60 inches deep x 36 inches high. The unit 9-inch-thick insulated walls comprised of 5 inches of 2300°F firebrick and 4 inches of 1900°F block insulation. Inert-atmosphere construction includes continuously welded outer shell; high-temperature door gasket; sealed heater terminal boxes; inert-atmosphere inlet, outlet and flow meter; and manual gas valve.