The ICAMPS MineVent module uses expanded versions of the Penn State University PENVENT and US Bureau of Mines MFIRE ventilation programs. As-mined and projected timing maps serve as the basis for drawing to-scale ventilation schematic diagrams. Using AutoCAD snap features the planner designates nodes in the ventilation network. Except for the atmospheric nodes, each node must be assigned a unique number. The system prevents duplicate node numbers.

The user connects the nodes with polylines which represent the actual branch airway path. The branch must have a start node and end node but you can have dummy nodes in between so that the actual branch path is used and the branch length can be calculated for use in the resistance formulas (see figure below). The branch length can also be typed in manually when calculating resistances. Each branch polyline has an associated attribute block that contains airway properties such as size, perimeter and surface roughness factor. Since the schematic is drawn to scale, the system can automatically compute the branch length and use the airway characteristics to calculate the branch resistance. The system has many features to simplify editing schematics and enhancing the ventilation diagram. All changes to a schematic drawing are stored permanently.