I am trying to model a large building with heating and no cooling. The
heating is constant volume. 90.1 Appendix G says I need to model the
baseline system as a VAV system with heating and cooling, and that I
need to include the baseline cooling system in the proposed building.

Trace 700 does not allow "divorcing" the heating from the cooling, which
means I will end up with a VAV heating system.

Trane CDS is saying that this is what I have to do. I accept the need
to have a VAV cooling system, but being forced to have the heating as
VAV means the energy differences between the proposed heating and the
90.1 minimum heating system will not be calculated since they are the
same.

My question is, how do I model the heating system as constant volume and
have the VAV cooling system? Has anyone had this problem and did you
just live with it?

Nick Anderson