The No. 907 electrically heated inert atmosphere walk-in oven has a maximum operating temperature of 1000F (540C) and workspace dimensions of 48 in. wide x 84 in. deep x 72 in. high (1220 x 2130 x 1830 mm). The oven features 8 in. (203 mm) thick walls, comprising 2 in. thick 1900F (50 mm 1040C) block and 6 in. (152 mm) thick 10 pcf density rockwool insulation, as well as an aluminized steel exterior and interior. Incoloy sheathed tubular heating elements provide 100 kW total power, while a 7800 cfm, 5-hp recirculating blower provides combination airflow to the workloads.