Thomas Industrial Services, INC | Home Thomas Industrial Services, Heat Process Equipment, Custom Furnaces, Gas Furnaces, Dual Fuel Furnaces, Custom Control Panels, Air Valves, Control Panels, Furnaces, Gas Valves, Pressure Switches, Actuators, Pressure Regulators, Control Valves, Burner Controls, Furnace Accessories We specialize in custom made furnaces (gas, oil, electric & dual fuel), ovens, gas trains, standard & pulse fire burner systems to fit each company's individual requirements.