The No. 821, a 650°F electric inert atmosphere walk-in oven, is currently available. Workspace dimensions inside the unit measure 36 x 156 x 48 in. A 7800 CFM, 5 hp recirculating blower provides horizontal airflow across the workloads. An aluminized steel exterior and interior are featured on the unit, which also includes 5-in. thick insulated walls throughout. Special construction for inert atmosphere processing includes components such as a pressure regulator, a flowmeter, a pressure gauge, internal high-temperature gasketing, a bellow-type doorway seal, and a 1⁄2-in. thick cellular silicon rubber atmosphere seal.