In which component would you find the fuel pump?

The fuel pump is located in the oil burner assembly, which is a crucial component of the heating system that is responsible for delivering fuel to the burner. In the oil burner assembly, the fuel pump draws oil from the storage tank and delivers it at the right pressure and flow rate to the burner nozzle. This controlled delivery is essential for achieving efficient combustion in the heating process.

In contrast, the ignition system is designed to initiate combustion by providing a spark or flame, while the mixing chamber is where the air and fuel mix before combustion. The flue system is responsible for venting the byproducts of combustion safely outside. None of these other components involve the direct function of delivering oil to the burner for the heating process, making the oil burner assembly the correct context in which to find the fuel pump.