Constructed with 5 in. insulated walls, aluminized steel interior and exterior, and reinforced ¼ in. steel plate top, No. 812 features air-operated rear hinged door and wear bars at sides of workspace. Workspace is reinforced for 3,000 lb loading at removable subway grate. While 40 kW installed in Incoloy-sheathed tubular elements heat 72 x 36 x 36 in. workspace, 3,300 cfm, 2 hp recirculating blower provides horizontal airflow to workload. Multiple controllers are included as standard.