Fabs may increase production capacity, which results in an increase in utility usage. As production increases, it may be difficult to complete capacity upgrades for compressed air equipment quickly enough due to equipment and construction lead times. Some systems begin to run out of redundancy. This presentation shows a case study for maintaining redundancy in order to perform proper maintenance and ensure provision of reliable compressed air to end users. The understanding of the operational health of HVAC equipment is key catch problems before they cause any system impacts.