For safe operation, what should always be monitored in oil burning systems?

Monitoring the draft levels in oil-burning systems is essential for several reasons related to safety and efficient operation. Draft refers to the flow of air or flue gases through the combustion system and is critical for ensuring that combustion occurs properly. Adequate draft helps to ensure that the combustion gases are vented safely out of the system and does not allow for any harmful gases, such as carbon monoxide, to enter the living space.

If draft levels are inadequate, combustion can become inefficient, leading to incomplete burning of the fuel, increased soot production, and potentially dangerous conditions from the accumulation of harmful gases. Proper monitoring of draft levels ensures that the system is balanced, operates efficiently, and minimizes the risk of system failure or safety hazards. This makes it a key parameter that should be regularly checked during operation and maintenance of oil-burning systems.

In contrast, while aspects like fuel level, outside temperature, and electrical supply could affect the operation, they do not specifically address the combustion process and safety in the same way that monitoring draft levels does.