FS-Curtis said its GS Series line of variable-speed drive air compressors is designed to be energy saving, environmentally-friendly and economical. The new compressors maximize energy efficiency by providing improved cooling of the main drive motor and other critical components, the company said. These cooler operating temperatures, in turn, help deliver better volumetric and electrical efficiency and extended service life. The variable speed drive allows users to match their energy usage to current system demands, helping to maximize energy efficiency by eliminating the need to overpressure the system.