Energy Efficient Variable Speed Air Compressors

Variable speed compressors are strongest where compressed air demand changes during the day. They reduce motor speed when less air is needed rather than repeatedly running fully loaded and then off-load.

Not always. A well-sized fixed-speed compressor may be suitable where demand is stable and the machine runs loaded for long periods. The correct choice depends on the site's actual demand profile.

Select from required free air delivery, working pressure, minimum and maximum demand, operating hours, leakage and future growth. Avoid excessive oversizing, as a VSD machine still needs to operate within an efficient control range.

A correctly sized receiver can help stabilise pressure and manage short demand peaks, but it does not increase continuous compressor airflow or automatically create energy savings.

Choose the lowest pressure that reliably supports the application after losses through dryers, filters, pipework and regulators. Unnecessary pressure increases energy consumption.

Confirm electrical supply, ventilation, service clearance, receiver capacity, dryer and filtration requirements, condensate management and pipework sizing.