The power supply group consists of a natural gas duct, two ducts (supply and return) for heavy oil, a combustion support air duct, and a series of air/gas & heavy oil injectors, uniformly arranged on the top of the tunnel furnace in two rows relative to the central body. Along the natural gas branch pipe, there is a manual valve, an on/off solenoid valve, and a modulating valve controlled by an electronic actuator. Along the heavy oil branch pipe, there is a filter, a preheating resistor for the oil, a motorized pump, a distributor controlled by a DC motor, and a series of dosing drawers serving each injector. The combustion air duct uses a motorized control valve and a series of manual valves. A thermocouple installed at the center of the burner group will transmit the temperature value to the burner’s control panel. After comparing the collected signals with the required temperature values, the on-board control panel sends instructions to the "HYBRID OIL TURBOGAS" oil & gas feeder, directly to the gas modulating valve, or for oil combustion, to the rotary distributor motor. A mechanical link between the modulating damper of the combustion air and the gas modulating valve allows for a continuous air-fuel ratio. Alternatively, it is possible to control the centrifugal fan motor via an inverter. There are also manual ball valves on the air pipe to support the combustion of each injector.

The "HYBRID AIRFUEL TURBOGAS" burner group operates in the furnace zone where the internal ambient temperature of the tunnel furnace is higher than the autoignition temperature of the gas or fuel oil. The equipment includes temperature detection and control, internal piping, internal electrical cables, internal control, combustion fan, air and gas and heavy oil ducts, switches, valves, instruments, and accessories.