Roots® Rotary Lobe Blowers

​Since 1854, we have been continuously manufacturing and developing the rotary positive displacement blowers under the industry respected name Roots®.

​Today, we produce robust, heavyduty bi-lobe or tri-lobe designs that deliver reliable performance with innovative Whispair™ technology for low noise, low pulsation compression.

Roots has its main manufacturing facilities including the original Roots factory in Connersville, IN (USA). The factory produces more than 25,000 machines yearly. You can read about the history of the Roots business on our latest blog 'Evolution of Roots brand in the UK', from the old WC Holmes Huddersfield factory through acquisitions by Peabody Holmes, Dresser Roots and GE before finally the purchase of the business by Howden.


Key Features

  • Easy to install, with small footprint.
  • Acoustic enclosure is designed to provide up to 22 dBA free field attenuation.
  • Broad operating performance range provides a multitude of efficient and compact solutions.
  • Air flow from front to rear is designed for personnel safety and equipment reliability.
  • Access to air filter is convenient and designed to reduce pressure losses, improving reliability and blower efficiency and protecting your investment.


  • Small rotary performance
  • Flow rate: Up to 10,710 m3/hr (6,300 cfm)
  • Pressure: Up to 15 psig
  • Vacuum: Up to 28” Hg

  • Large rotary performance
  • Flow rate: Up to 120,000 m3/hr (70,000 cfm)
  • Pressure: Up to 35 psig
  • Vacuum: Up to 28” Hg and high vacuum
  • Custom design available for high static pressures


  • ​Huge range of applications as the small lobe blowers are designed to work on trucks, while the bigger blowers operate in applications such as vacuum filtration and drying and materials handling.

Product Range

Rotary Positive Displacement Blowers

All Roots blowers are of a compact, sturdy design engineered for continuous duty and maximum reliability. These blowers have a time tested lubrication system and an exclusive "figure-8" gearbox design improves oil distribution to the timing gears and lengthens bearing life.

Processes: Waste water treatment, Mechanical vapour compression, and other industrial processes

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Factory standard packages

The EasyAir Rotary Factory Blower Package System is an improved design based upon the popular EASYAIR 8000 package. The EasyAir Rotary system provides performance engineering in a standard package. It is produced for vacuum or pressure applications, enabling simple, on-site installation.

Processes: Waste water treatment, pneumatic conveying & bulk handling needs, and process air needs

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Truck mounted blowers

The Roots TRI-NADO™ TM Truck-Mount, Tri-Lobe Vacuum Blowers have been redesigned to incorporate the latest technology for reduced noise and vibration.

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Case Studies

Bird Island Wastewater Case Study

In 2011, Howden began operating the largest-ever installation of its Roots IntelliView controls system at Bird Island’s aeration basins.

Read case study

Positive Displacement (PD) Blower Calculator

Selecting the correct blower is the most important decision when designing a pneumatic conveying system. Our document helps you get it right.

Read case study

Find your contact

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General enquiries: 

General enquiries

PersonNick McLean
+44 141 885 7500

If you would like to submit an enquiry please get in touch.

Parts & Service

Lifetime Support

Our lifelong aftercare service will supply original replacement parts, support you with maintenance and installation, and even train your own engineers in maintenance techniques. We keep detailed plant records almost indefinitely, and regularly supply spare parts for machinery over 50 years old.