Efforts are being made by researchers and practitioners to realize the true definition of BIM (Building Information Model/Modelling). With an emphasis on the information (than the geometry representation), spatial relations and contextual information derived from BIM can aid users to better understand spaces and assets in the building. Data-infused BIM (aka live BIM) tries to capture the dynamism of the building (related to occupants, environment, physical systems, etc.) and use it for better decision making during the operation phase. This requires heterogeneous data coming from different sources to provide the live status of building systems and occupants. This paper investigates the system requirements for asset management of HVAC (Heating, ventilation, and air conditioning) systems in buildings using live BIM and linked data through the semantic web.