An electrically heated, 250°F (121°C) shelf oven and environmental test chamber, No. 926 is used for age testing electrical/electronic components at one customer’s facility. Heat to the load is provded by 12 kW installed in Nichrome wire elements. Workspace dimensions measure 68 x 30 x 66” and a 1,000-cfm, 1-hp recirculating blower provides horizontal airflow. The shelf oven has 4” insulated walls, aluminized steel interior and exterior, and a 20 x 56” double-pane Lexan window in each of the unit’s two doors. The environmental test chamber also includes a disposable fresh air filter, digital-indicating temperature controller, manual-reset excess temperature controller with separate contactors, recirculating blow airflow safety switch and a remote control panel (shown separate in the photo).