Where is the primary air adjustment located in relation to the burner?

The primary air adjustment is crucial for optimizing combustion efficiency in a burner. It is typically located at the entrance to the burner, which allows for the proper mix of air and gas before the fuel enters the combustion area. This position ensures that the correct amount of air is mixed with the fuel, leading to a better combustion process, improved efficiency, and reduced emissions.

Having the primary air adjustment at the entrance allows operators to easily make adjustments for varying fuel characteristics or operational conditions. If the air is adjusted too rich or too lean, it can significantly affect the flame quality and the overall performance of the heating system, making this location essential for operational flexibility and safety.

In contrast, while other locations like the exit, middle, or above the burner may play roles in the overall design and functionality of the burner system, they do not serve the same primary purpose of adjusting air intake for optimal combustion before the fuel is ignited.