Oct. 10—JANESVILLE — A Janesville-born company that for years has been the nation's biggest player in waste-oil-burning furnaces is now owned by a St. Louis private equity firm. Rock Energy Systems, ...

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In the research and development area of Rock Energy Systems’ plant in Janesville, company CEO Barry Brandt watched a blowtorch-like orange flame through a porthole on one of the large waste ...

How to Make a Waste Oil Burner! Homemade Steel Melting Furnace ...

A Janesville-born company that for years has been the nation’s biggest player in waste-oil-burning furnaces is now owned by a St. Louis private equity firm. (0 Ratings) ...