Which types of blower assemblies are typically used in oil furnaces?

In oil furnaces, the blower assemblies are primarily described as direct drive and indirect drive, which refers to the method used to connect the motor to the blower.

Direct drive blowers have the motor directly attached to the blower wheel, allowing for a more compact design and reduced maintenance needs. They tend to be more efficient because they eliminate energy loss associated with belts or pulleys. This type of setup is commonly found in residential oil heating systems due to its reliability and simplicity.

Indirect drive assemblies, on the other hand, use belts and pulleys to connect the motor to the blower. This method can provide flexibility in blower size and speed adjustment, as well as isolation of motor vibration from the blower. However, it may require more maintenance over time because of the wear and tear on the belts.

While the other options highlight various technical specifications that can be relevant in blower design, they do not encompass the fundamental type of drive mechanism utilized in the construction of blower assemblies for oil furnaces as thoroughly as direct drive and indirect drive do.