[EnergyPlus_Support] Help needed with zoning

[Kristina Donova <kristinadonova@xxxxxxxxx>]

Hello EnergyPlus World,

I am new to energy modeling and EnergyPlus and I need some help on building zoning!

I am trying to model a three-storey building which has a radiator system for heating and some of the premises will also have outdoor air units installed for fresh air supply. As given on the design drawings there's an outdoor air unit designed to serve multiple premises situated on all three floors of the building.

I know that outdoor air units can serve only one zone, so the first thing that comes to my mind is to simply add all the premises that are served by the same outdoor air unit to one zone. But can I have a zone that includes premises on different floors? Wouldn't it reflect on the floor area at least? Or can I model this system as three separate ones for each floor? I've found some older posts on a similar topic, advising to model one system and then use ZoneCrossMixing, but this would work only between two zones. In my case there would be three.

Please, help me find a solution!

Thank you very much!
Kristina

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