Rotary Scroll Air Compressor 2.2-7.5kW (3-10HP) Legendary Experience, Innovative Design The EnviroAire S products are fixed speed, single stage, 100% oil-less rotary scroll compressors from 3 - 10 HP (per pump). Scroll packages have been designed specifically for industrial, laboratory, and medical applications in a variety of configurations. The EnviroAire S Medical scroll systems meet current CSA Standards, are NFPA 99 Code compliant, and are offered in several designated flow designs. 50/60 Hz 3-10HP 116 or 140 PSI Base Mount, Tank Mount, Stacked Frame, or Bare Air End Industrial, Laboratory, or Medical