A fractional horsepower compressed air source, rated at one horsepower (hp), commonly utilizes a positive displacement mechanism to increase the pressure of ambient air. This class of device typically employs either a reciprocating piston or a rotary vane design to achieve compression. As an example, such a unit might power a small nail gun or inflate tires on a bicycle, delivering a limited volume of pressurized air for intermittent use.
This type of air compression device offers advantages in portability and affordability. Its size and power make it suitable for tasks where a high volume of compressed air is not required, reducing energy consumption and noise levels compared to larger industrial units. Historically, devices of this size have become increasingly prevalent in home workshops and for light-duty applications due to their ease of use and minimal maintenance needs.