Low Operating Costs. With the ability to adjust air output ranging from zero to 100 percent, ZAKF compressors run most efficiently to ensure keeping costs down. Our compressors offer exceptional energy-saving performance because when the air consumption decreases, the machine’s air output and motor electric current declines as well. If the compressor is not consuming air after an extended period, it will idle and shut off, which will save energy and reduce operating costs. However, when the air consumption increases, the compressor will automatically start.