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I see that there are already two other posts on this issue, but unless I missed something, I didn't find a solution/workaround for this warning.

   ** Warning ** Indicated Zone Volume <= 0.0 for Zone=THERMAL ZONE 1
   **   ~~~   ** The calculated Zone Volume was=-3.18
   **   ~~~   ** The simulation will continue with the Zone Volume set to 10.0 m3. 
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings; to show more details on individual zones.

It seems that the reason that the zone volume is calculated as a negative number, is due to the direction in which one of the volume's surfaces was drawn. How do I ensure that the vertices are drawn counterclockwise in Sketchup?

I see that there are already two other posts on this issue, but unless I missed something, I didn't find a solution/workaround for this warning.

   ** Warning ** Indicated Zone Volume <= 0.0 for Zone=THERMAL ZONE 1
   **   ~~~   ** The calculated Zone Volume was=-3.18
   **   ~~~   ** The simulation will continue with the Zone Volume set to 10.0 m3. 
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings; to show more details on individual zones.

It seems that the reason that the zone volume is calculated as a negative number, is due to the direction in which one of the volume's surfaces was drawn. How do I ensure that the vertices are drawn counterclockwise in Sketchup?

I see that there are already two other posts on this issue, but unless I missed something, I didn't find a solution/workaround for this warning.

   ** Warning ** Indicated Zone Volume <= 0.0 for Zone=THERMAL ZONE 1
   **   ~~~   ** The calculated Zone Volume was=-3.18
   **   ~~~   ** The simulation will continue with the Zone Volume set to 10.0 m3. 
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings; to show more details on individual zones.

It seems that the reason that the zone volume is calculated as a negative number, is due to the direction in which one of the volume's surfaces was drawn. How do I ensure that the vertices are drawn counterclockwise in Sketchup?

I see that there are already two other posts on this issue, but unless I missed something, I didn't find a solution/workaround for this warning.

   ** Warning ** Indicated Zone Volume <= 0.0 for Zone=THERMAL ZONE 1
   **   ~~~   ** The calculated Zone Volume was=-3.18
   **   ~~~   ** The simulation will continue with the Zone Volume set to 10.0 m3. 
   **   ~~~   ** ...use Output:Diagnostics,DisplayExtraWarnings; to show more details on individual zones.

It seems that the reason that the zone volume is calculated as a negative number, is due to the direction in which one of the volume's surfaces was drawn. How do I ensure that the vertices are drawn counterclockwise in Sketchup?

Edit: Other two posts on this issue:negative zone volume and total wall area by ashrae 90.1 definition and Why a negative zone volume?.