Roots dresser blowers are oil free blowers. They are designed to move air from one place to another using a pressurized current of air. By using rotary pistons, the roots dresser blower doesn’t require lubrication. This allows the roots dresser blower to be used in applications where air must be devoid of contamination. For example, in a food processing plant, the air must be oil free to avoid contaminating the food supply. Another possible application is a manufacturing clean room, such as those found in semiconductor manufacturing plants. A blower that uses oil can be used in applications that don’t require clean air. For example, a blower that feeds a furnace can have oil, since it will likely be burned up anyway. The choice of blowers determines what applications are suitable for. By researching a blower and its capabilities, an engineer can better design a system that complies with regulation standards.