No. 843 is an 850°F (454°C), gas-heated cabinet oven from Grieve, currently used for curing paint on steel and aluminum test coupons at the customer's facility. Workspace dimensions of this oven measure 20" W x 20" D x 20" H. 100,000 BTU/HR are installed in a modulating gas burner, while a 600 CFM, ½-HP recirculating blower provides horizontal airflow to the workload.

This Grieve oven has 6" insulated walls, an aluminized steel exterior and Type 430 stainless steel interior. The oven features a 12" wide x 8" high door installed in main door. Additional safety features include those required by IRI, FM and National Fire Protection Association Standard 86 for gas heated equipment, including a 325 CFM, ½-HP powered forced exhauster.

Controls on the No. 843 include a digital indicating temperature controller.