What is the main purpose of an oil filter in heating oil systems?

The main purpose of an oil filter in heating oil systems is to filter impurities from the oil before it enters the system. This is crucial because any contaminants, such as dirt, debris, or sludge, can cause damage to various components within the heating system, including pumps and burners. By ensuring that only clean oil circulates through the system, the oil filter helps to maintain operational efficiency, prolong the lifespan of the equipment, and minimize maintenance issues.

This filtering process is essential for the safe and effective operation of heating oil systems, protecting them from the adverse effects that impurities can cause. Other options, such as maintaining oil viscosity or cooling the oil, do not reflect the primary function of an oil filter, as these processes are managed by different components within the system. Similarly, regulating oil temperature is typically handled by thermostatic controls rather than the filter itself.