HVAC company VTS has introduced a new BIM approach for air handling units (AHUs).

VTS states that since there is a need to optimise investment costs and operating costs, IT tools and programmes are indispensable.

BIM is nothing but just a digital reflection of the physical and functional properties of the whole object and its specific installations or used components, the company states.

Some of  the programmes available on the market, offering BIM class, are Autodesk Revit, Graphisoft ArchiCAD, BIMVision, Nemetschek Allplan, Nemetschek Vectorworks, Tekla Structures, and SketchUp.

For the MEP sector, the models in the RFA (Revit) format are the most popular. VTS website states: "This (RFA) file format makes it possible to develop a multi-branch, parametric digital model of the building, so it is possible to conduct various analyses (e.g. power supply, endurance, maintenance, etc.), leading to the optimization of the investment before construction works begin. The analyses are the more precise and reliable, the more accurate the data and parameters defined in the model are. Therefore, the entire design industry strives to ensure that only libraries provided by equipment manufacturers are in use, because they contain a set of parameters characterizing the individual components of the facility and its installations."

VTS states that the application of air-handling units cooperating with the air ducts system is related to the need to design an adequate system for the entire building. "It often happens that the initial assumptions evolve during the project. The concepts of distribution of hydraulic, electrical and air systems change, together with the manner of installation connection to the air handling unit. In such cases, static producer libraries of devices contain parameters which are outdated (not following  the changes), which on the other hand does not ensure updated data in the multi-branch data exchange. The libraries can be modified manually, but this process is extremely time consuming and fraught with risk of errors," the website further stated.

In order to meet these needs, VTS has created the possibilities of generating digital models of VENTUS air-handling models on-line. This is possible to achieve with implementation of a new ClimaCAD OnLine 4.0 selection tool, which contains RFA files generator.

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