No. 852 is an 850°F (454°C), high temperature walk-in oven from Grieve, currently used for heat treating and baking varnish at the customer's facility. Workspace dimensions of this oven measure 60" W x 96" D x 72" H. 120 KW are installed in Incoloy-sheathed tubular heating elements, while a 7800 CFM, 5-HP recirculating blower provides combination airflow to the workload.

This Grieve oven has 8" insulated walls and a 4" insulated floor. Additional features include an aluminized steel interior and exterior and safety equipment for handling flammable solvents, including explosion venting door hardware.

Controls on the No. 852 include a digital indicating temperature controller and manual reset excess temperature controller with separate contactors.