Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Have you tried the free open source software OpenStudioApplication?
It is a graphical user interface built upon the OpenStudio SDK and which uses EnergyPlus as a simulation engine (you can grab the IDF if you want and keep modifying it, though I would recommend sticking with using an OpenStudio Model (OSM) generally speaking). One of the abilities it has is to provide a clean usable way to create AirLoopHVAC and PlantLoop objects without having to manage nodes and branches manually.
See the tutorial on Air, Plant and Zone HVAC Systems for some screenshots.
