All Star Blower
Commonly referred to as "regenerative", "ring", "side channel" or "vortex" types of blowers, All Star HB™ Series regenerative blowers are used for either vacuum or pressure applications.  These blowers are the best selection for applications requiring low-cost blowers for clean, filtered to HEPA standards, non-pulsating and vibration-free air. 

Dresser Industries - Roots
Roots manufactures a full line of low-pressure air and gas handling blowers, exhausters and systems. ROOTS has been in continuous operation since 1854 when the Roots brothers discovered the principle behind the rotary lobe blower. Since 1854 ROOTS has developed extensive experience with providing solutions for a wide range of applications.