No. 989 is an electrically heated, 2,000-degree F inert atmosphere furnace from Grieve Corp. that is used to process fabricated parts. Workspace dimensions measure 30-in. wide by 48 in. deep by 30 in. high. The furnace features 57 kW installed in nickel chrome wire coils supported by vacuum formed ceramic fiber to heat the unit. A roof mounted, heat-resisting alloy circulating fan powered by a 2-hp motor with V-belt drive maintains the inert atmosphere for the workload. The furnace features 7-in.-thick insulated walls and 7 ½-in. floor insulation.