Sullair's 5 - 25 hp stationary compressors feature the S-energy® series of Performance Air System packages for smaller shops and factories. The ES-6 Encapsulated and ShopTek Lubricated air compressors can be used alone or can be configured with a performance air system sized and matched to provide maximum performance and value. The S-energy® series of Encapsulated air compressors include both constant speed and variable speed drives with quiet running and the smallest footprint in its class.