All Aero-Pond compressors are designed and manufactured specifically for outdoor use. Our products are tested and certified to Underwriters Laboratories standards for permanent outdoor use. Heat, Rain, Snow or Dust wont stop these durable units. The long life linear design has only a few moving parts. Fewer moving parts improves reliability and reduces power consumption. No oiling, no vane replacement, no piston replacement. Because we are pumping air rather than water, significantly less energy is required to accomplish our goal as compared to a water pump based aeration system.