LEWCO recently delivered two 550°F drum heating cabinets to a multi-national company in the petroleum refining and gas processing industry. The custom cabinets employ thermal fluid heat and are divided in the center to create two individual heating chambers, which can each hold two 55-gallon drums. Each chamber is able to operate at different temperatures and features separate heat exchangers, circulating fans, and thermocouples. Circulating fans and exhaust fans were upgraded to AMCA (Air Movement and Control Association), type C, spark resistance and include explosion proof motors. Explosion proof air pressure switches were also included to provide safety interlock capability for the controls. Per customer specification, the heating cabinets were manufactured to be installed outdoors under a roof canopy in an industrial environment.