VAV - austosized Room Loads not showing

[David_S]

Hi All,

I am modeling a VAV system (ASHRAE system 8), used as a baseline for ASHRAE 90.1 modeling.

I've run the rooms & systems autosizing, but it seems that the room loads (as shown i.e. in the ApacheHVAC Systems Parameters dialog - Room Loads & Supply Airflows tab - Cooling / Heating design room loads) are still showing zeroes for all rooms. The numbers are green, in my understanding indicating that they have been autosized).

Am I missing something ? (it is the first time doing ASHRAE 90.1 model without the ASHRAE90.1 Navigator). Or is it a glitch in the software?

Please advice what else can I look at.

Thanks!!

[David_S]

Update - I've set the building envelope to aluminium sheet only, to increase the heating & cooling load ad absurdum.

Autosized room loads still at zero ..

Perhaps there is there an elephant in the room that I don't see?

Please help!!