Which grade of fuel oil is most commonly used in residential heating systems?

The most commonly used grade of fuel oil in residential heating systems is No. 2 fuel oil. This grade is favored for several reasons. No. 2 fuel oil is a middle distillate that strikes a balance between efficiency and cost. It has a higher viscosity compared to lighter oils, which allows for better handling and storage, as it reduces the risk of fluid volatility.

Additionally, No. 2 fuel oil has a good energy content, providing effective heating output when burned in residential heating oil burners. It is suitable for both furnace and boiler applications, contributing to its widespread usage in homes across various climates. The predominance of No. 2 fuel oil can also be attributed to its availability, as it is produced in large quantities and is readily accessible to consumers. Its performance credentials make it the preferred choice for homeowners looking for reliable and consistent heating solutions.