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BAS Strategies in New Construction vs. Existing Buildings
OTHER PARTS OF THIS ARTICLEPt. 1: Picking the Best BASPt. 2: The BAS and Making Multiple ChangesPt. 3: Pt. 4: Overlooked Opportunities in BAS FunctionalityPt. 5: This Page
In new construction it's just a clean slate. You can go in and do it right the first time. With an existing structure, the building comes with baggage. It already has the systems installed and operating.
There are a lot of issues in an existing building: you may have different generations of building automation systems, facility engineers may have done some undocumented workarounds on systems, or over time, the space usage in buildings may have changed and the original control design of the space needs to be updated.
When you start to integrate the systems in existing buildings on an enterprise basis you may find the data is inaccurate or missing. For example, the building may have a variety of naming conventions as different contractors over time have called the same type of equipment (VAV or an air handler) a different name, or you also may find it difficult getting the original control documents.