The three most common types of air compressors we offer are rotary screw, rotary vane, and piston. Screw air compressors are convenient to run as they continuously run air for a required purpose, are safe to use, and perform well in all weather conditions. Vane compressors are used for smaller applications where floor space is an issue; however, they are not as efficient as rotary screw compressors. Piston or reciprocating compressors are often used to supply air to building control and automation systems.