Variable Speed Drive (VSD) Compressors: What to know.

Variable Speed Drive (VSD) compressors are a game-changer in the world of compressed air. These compressors automatically adjust their operating speeds to match the real-time demand for compressed air. It's an important feature, especially when it comes to energy savings. Surprisingly, the electricity consumed by a compressor can account for the largest portion of its total cost of ownership, not the initial purchase price. On average, VSD technology can reduce energy costs by 35% to 50%, which translates into significant savings.

Now, let's delve into the key differences between fixed speed and VSD compressors. Fixed-speed compressors are simpler machines with a lower upfront cost. You turn them on, and they run at full speed until they need to be shut off. It's a straightforward concept. On the other hand, VSD compressors are more advanced. They don't just run and stop; they precisely match their output to the demand, making them highly sophisticated. Consequently, the initial investment for VSD compressors can be higher due to their superior capabilities.

But when should you consider investing in a Variable Speed Drive (VSD) compressor? While VSD technology seems ideal for any business, it may not always be the best solution. VSD compressors are most suitable for businesses with fluctuating demand, such as those with varying processes or multiple shifts. Situations that warrant a VSD compressor include when compressed air demand varies significantly between jobs, fluctuates by shift, day of the week (e.g., weekends), or seasonally, or when production requires precise pressure control. If your operation is consistent without significant demand fluctuations, or if the variations are minimal, a fixed speed compressor might be the better option.

Alternatively, you can consider a hybrid solution by combining a fixed speed compressor with a VSD compressor. The fixed speed compressor would handle the base load, while the VSD compressor(s) would trim the demand as needed. This setup provides redundancy, ensuring uninterrupted production. If one compressor shuts down, the other takes over the full demand, keeping operations running smoothly.

Now, let's explore the benefits of investing in a VSD compressor:

VSD compressors offer numerous benefits, including energy savings, precise pressure control, consistent performance, and efficient operation. They are particularly advantageous for businesses with fluctuating demand patterns. However, it's essential to evaluate your specific needs and consider a combination of fixed speed and VSD compressors or a purely fixed speed compressor if the demand variations are minimal.

If you have any questions, reach out to an expert today. 

ALUP ALLEGRO 110 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 110 Oil Injected Screw Compressor with Variable Speed Drive

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ALUP ALLEGRO 132 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 132 Oil Injected Screw Compressor with Variable Speed Drive

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ALUP ALLEGRO 160 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 160 Oil Injected Screw Compressor with Variable Speed Drive

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ALUP ALLEGRO 200 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 200 Oil Injected Screw Compressor with Variable Speed Drive

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ALUP ALLEGRO 250 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 250 Oil Injected Screw Compressor with Variable Speed Drive

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ALUP ALLEGRO 90 Oil Injected Screw Compressor with Variable Speed Drive

ALUP ALLEGRO 90 Oil Injected Screw Compressor with Variable Speed Drive

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Who we are and how Ash Air can help your business!

Ash Air has been around in New Zealand since 1979, and we’ve grown into a nationwide company with international support and a reputation for quality and reliability.We look after all things compressed air for your business!

  • Rotary Screw and Piston Air Compressors
  • Vacuum Pumps and Blowers
  • Nitrogen Generation
  • An extensive line of Air Treatment components
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  • Mobile Compressors, Generators, and Light Towers

Ash Air's range of Chicago Pneumatic, ALUP, Pneumatech, and Atlas Copco products are used extensively around the world in industries ranging from oil and gas to food, automotive and farming, and we bring you these world-class compressors here in the land of the long white cloud.Our technicians are compressed air equipment experts and are dedicated to addressing customer needs. Supported with nationwide coverage, Ash Air offers one of the widest selections of compressed air, vacuum pump, and industrial gas equipment and parts available today in New Zealand.

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With Ash Air, you can count on reliability and high performance for even the most demanding applications. We focus our efforts on the following:

  • Increasing uptime
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  • Reducing energy consumption and meeting our sustainability goals
  • Improving the cleanliness of compressed air


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