Graphisoft MEP Modeler (where MEP stands for Mechanical/Electrical/Plumbing) is an extension to Archicad, Graphisoft's architectural design tool to create three-dimensional models of ductwork, piping and electrical networks in order to make the building information model of the designed building more detailed an accurate.

Since Archicad is primarily used by architects, the building parts which are usually modeled in 3D with Archicad are walls, columns, slabs, roofs, etc. and some other objects like furniture. But when detailed plans are to be elaborated especially if the project is a medium or large-sized building, collision detection and constructibility are becoming more and more important in order to minimize design errors and unnecessary delays during construction. This is where MEP Modeler can help building engineers and architects to create a more detailed building model with ductworks and other HVAC systems modeled in 3D in order to achieve a better coordination between the different trades such as building engineers, structural engineers and architects.