The most common opportunity to recover energy cost is to control the compressed air leaks. Effective leak control in an air system can pay huge dividends. A quarter inch leak in a 100-psi system will pass about 100 CFM of compressed air. This is approximately $12,000 in annual wasted power cost based on 24 hours a day compressor operation with a power rate of $0.07 per kW. The process of detecting and monitoring leaks should focus on more than the basic header and piping system. The fact is that you will find a majority of your leaks at valves, fittings, connections, tools and at the point of use. It is important to remember the interdependent relationship between air system components. Controlling air leaks will not translate into reduced energy cost unless the compressor controls and air delivery system are in proper working condition.