Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
First question: it is possible to use more than 1 VRF terminal unit in a single zone. However, there is no real need to do so unless you are comparing field data to simulation results. Even then the need is minimal since you are ultimately comparing energy use and whether you use 1 or 2 terminal units in the zone should result in nearly the same total energy use. You could partition the zone if you like, and also know that if the system is autosized and the zone is NOT partitioned, each terminal unit will be sized to meet the entire zone load.
Second question: there is not yet a mechanism to connect a DOAS system to the OA inlet of a VRF terminal unit mixer. There are tests while reading the input data that check the zone node connections where the terminal unit's inlet and outlet nodes are connected to the zone exhaust and inlet nodes.
