HVAC systems constitute ∼ 40% of energy in commercial
buildings, and faults in HVAC account for 5% to 20% of
its energy consumption. Typically, HVAC in modern buildings
are managed using Building Managing Systems (BMS),
and fault detection is one of the essential services provided
by BMS to keep HVAC operational. The current techniques
used for fault detection fail to detect large number of effi-
ciency related faults. We developed BuildingSherlock (BDSherlock),
which is a web service based fault management
framework that exposes building information to automatically
detect faults using useful algorithms. We deploy BDSherlock
in a 145000 sqft building at UC San Diego, successfully
demonstrate faults using data driven analysis.