THE GRIEVE CORP. : No. 816 is a 500 ºF gas-fired, rotary hearth oven currently used for preheating and curing powder coatings onto electric motor parts. Workspace dimensions measure 54” W x 54” D x 72” H. It has 350,000 BTU/hr installed in a modulating gas burner, and a 4200 CFM, 3 HP recirculating blower provides airflow to the workload. Two 48”-diameter hearths, constructed from rolled angles and covered with perforated metal, carry the loads in process.