Memphis, TN: Thomas & Betts – HVAC Division (REZNOR) announces the addition of Models RA-250 and RAD-250 Waste Oil Heaters to their extensive line of products specifically designed for recycling used oils into free shop heat. The Model RA is a standard unit space heater while the Model RAD is a ductable furnace, designed for ducting heat to wherever it is needed. Both models are rated for 250,000 BTU input…full story.