Grieve’s No. 923 is an electrically-heated, 500°F Class 100 cleanroom cabinet oven, currently used for drying precision parts in baskets. Workspace dimensions measure 36 × 36 × 51 inches. 30 kW power installed in Incoloy-sheathed tubular heating elements and a 1500 CFM, 2-hp recirculating blower provide heated horizontal airflow to the workload. This cleanroom oven features an aluminized steel exterior finished with white epoxy paint, #4 brushed finish stainless steel door cover and control panel face, Type 304, 2B finish stainless steel interior with continuously backwelded seams and 4” thick insulated walls. Double front doors with positive latching door hardware are also included. No. 923 has two 30 × 24 × 6-inch thick stainless steel high-temperature HEPA recirculating filters and easily removable ductwork to expose the filters for inspection and replacement. Controls on this Class 100 cleanroom cabinet oven include a digital indicating temperature controller, manual reset excess temperature controller with separate contactors, recirculating blower airflow safety switch and solid-state contactors.