Which of the following is not included in the inspection of combustion appliances?

The inspection of combustion appliances typically covers various components that are crucial for safe and efficient operation. The inclusion of elements like the chimney, wiring, and heat exchanger is essential because they play direct roles in the combustion process and overall safety of the appliance.

The chimney is inspected to ensure it provides adequate venting for combustion gases, preventing the risk of backdrafting or gas buildup in the appliance. The wiring is checked to confirm that electrical connections are correct and safe, avoiding hazards like electrical fires or malfunctioning controls. The heat exchanger is assessed for leaks or blockages, as it is critical for transferring heat from the combustion process to the air or water being heated.

Fuel tanks, while they are components of some heating systems, are generally associated more with fuel storage than with the direct operation of the combustion appliance itself. They are not a standard part of the inspection process for the appliance itself, focusing instead on the appliance's immediate components that affect combustion and safety directly. Hence, fuel tanks do not fall under the typical scope of combustion appliance inspection.