Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The PTAC is a zone-based system, but if you have multiple indoor units supplied from each outdoor unit this is likely to be a VRF system. There is a VRF detailed HVAC template in DesignBuilder that you can use to quickly set this up as a starting point. The template includes a DOAS air loop or you can add those separately if you have any form outdoor air pre-conditioning or control over the outdoor air, or simply use the "Outdoor air supply" connection in the VRF indoor unit edit dialog to add direct air. These systems and their data inputs are described in the Help file.
