Why might an oil burner be equipped with a larger fan wheel?

A larger fan wheel in an oil burner primarily serves to increase static pressure, which enhances the airflow through the system. This is crucial for ensuring that enough air reaches the combustion chamber, thereby facilitating optimal fuel combustion. Increased static pressure means that the burner can overcome resistance in ductwork or filters, maintaining an efficient flow of air and ensuring the proper mixing of fuel and air, which is vital for effective combustion.

In residential and commercial heating systems, maintaining the correct air pressure is essential for not only achieving high combustion efficiency but also for ensuring safety by preventing the buildup of unburned fuel. A larger fan wheel can thus contribute significantly to the performance and reliability of an oil burner by enhancing its ability to draw in air and expel exhaust gases properly.

While noise reduction and power consumption can be considerations in fan design, the primary function in this context is closely tied to supporting combustion by maximizing static pressure. This strengthens the importance of the fan size in achieving a well-functioning oil burner.