The 500°F (260°C) walk-in oven has 4” insulated walls and an aluminized steel interior and exterior. Features include an integral top-mounted heat chamber, single-door front and rear access points, 2” insulated floor with channel-guide tracks and two fixture supports with flanged wheels. Controls on No. 958 include a digital programming and recording temperature controller, manual-reset excess-temperature controller with separate contactors, a recirculating blower airflow safety switch and an SCR power controller. The electrically heated walk-in oven can be used for heat treating long fluorocarbon shapes supported by fixtures on wheels. A 4200-cfm, 3-hp recirculating blower provides combination airflow to the workload while 60 kW are installed in lncoloy-sheathed tubular heating elements.