Municipal facilities in Louisville had reached a tipping point, and city officials knew it. As is the case with many cities and states — not to mention K-12 school districts and public colleges and universities — years of deferred maintenance had taken a heavy toll. Facing limited resources to address a growing backlog of work orders, facility managers and their staffs were able to keep aging facilities and systems operating, though not energy efficient in many cases.

http://www.facilitiesnet.com/hvac/article/New-HVAC-Technology-Can-Deliver-Benefits-Beyond-Bottom-Line–17404