9. The system according to claim 7 wherein the dynamic physical behavior parameters are temperature, humidity, flow and pressure.
7. A building Heating, Ventilation and Air Conditioning (HVAC) fault detection system comprising: an interface configured to access a Building Information Model (BIM) file library and import the building HVAC system BIM files; an HFM node library configured to store a plurality of different predefined HFM node types wherein an HFM node models the dynamic physical behavior parameters of air and water flows in predefined HVAC components as derived from the BIM files; a Graphic User Interface (GUI) configured to input and edit HFM node and linkage configuration data during an HFM graph assembly; a compiler coupled to the interface and GUI, configured to compose together the BIM file data with the additional linkage configuration data; and a Fault Detection and Diagnosis (FDD) generator coupled to the compiler and HFM node library, configured to compare the BIM file types for the building HVAC system with the predefined HFM node types and select from the predefined HFM node types, the HFM nodes that correspond and generate an HFM graph wherein the HFM graph is by mass air flow path corresponding to the building HVAC system components and behavior.