Portable blowers are relatively low-volume, High Pressure blowers that produce centrifugal airflow. They are used in compression blowers, vacuum blowers, and industrial blower applications. Compression Portable blowers can be used or configured as a compressor or air supply unit. Vacuum Portable blowers can be used or configured as a vacuum pump or exhauster for removal or suction of air, fumes, or gases. Selecting Portable blowers requires an analysis of compressor or vacuum specifications, power sources, and features.
There are four power source choices for Portable blowers: DC power, AC single-phase, AC three-phase, and engine. Features for Portable blowers 
include: control panels and pressure or vacuum gauges. Most control panels include adjustment controls instead of a simple, regulator knob. Portable blowers can also have a pressure or vacuum gauge or sensor with a dial or digital readout that monitors the pressure or vacuum levels in the system.
Caution is necessary in selecting blowers for series installation. It is generally accepted that most pre-engineered blowers are capable of withstanding twice their catalog rated static pressure. In other words, where two blowers are installed in series the second blower housing should withstand the higher pressure. There is, however, a need for concern when the combined pressure exceeds twice the rated static pressure for one blower. In series applications involving three or more blowers, or in any system in which positive or negative pressure exists prior to the consideration of the blowers, special housing reinforcement may be necessary.