The wide range of low-pressure technology available offers numerous choices when it comes to efficiently meeting the needs of low-pressure applications. For most applications, there are several technologies capable of powering a specific installation. The challenge is to closely examine the application needs and select the right technology to ensure a reliable, stable and energy-efficient air supply. This whitepaper compares rotary lobe and screw blowers, internal and external compression, and how to properly apply these technologies for designing an energy-efficient system.