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@Julien Marrec @adhilton

In design builder, when we want to connect more than 2 components to a single Fresh Air Handling Unit there is a need to connect all components to FAHU through same mixer / splitter. Multiple mixers / splitters cause severe errors in simulation. Whenever a component is added the mixer / splitter branch automatically updates to increase in number of connections making more connectors available. See following images.

https://1drv.ms/f/s!Ase9DtM9ZxGyjFqFs7hzpmWa-Q_T