I am trying to model an art gallery with underfloor air supply, and have
specified return air plenums above each of the gallery spaces. However,
I am now having problems with energy recovery at the AHUs. I get
warnings that there is no central exhaust flow, as well as condensation
and frost forming on the coils. Is there something else I need to
specify for eQuest to recognize the return air from the plenums?

thanks,

Lizzie Davies