In nozzle sizing for oil burners, what formula is used with input BTUs?

The correct approach to nozzle sizing for oil burners involves using a specific formula that relates the input BTUs to the appropriate nozzle size to ensure efficient operation of the burner. The industry standard for this calculation is to divide the input BTUs by 140,000. This factor represents the typical heating value of No. 2 heating oil, which is used in many oil-burning applications.

When you divide the total input BTUs by 140,000, you arrive at the gallon-per-hour (GPH) requirement for the burner. This is critical because selecting the correct nozzle size based on GPH is essential for maintaining proper combustion efficiency, ensuring that the oil is atomized correctly for optimal combustion.

Using the other divisors provided results in inaccuracies for determining GPH. Each of those alternatives is based on different heating values or assumptions that may not align with the standard practices in oil burner applications. Thus, choosing 140,000 ensures compliance with the established methodologies for effective nozzle sizing in oil burner systems.