Hi, All:

I make a simple model to check how much energy does the VAV system can saving.

The result shows like below:

Something puzzle me :

1. Also the fan power increase a lot , how could both Space cooling & Space heating decrease? I set both of the 2 models the same T-schedule and the same Fan power. Maybe the Space Heating can be understand by the fan ?T, but how I can?t explain the cooling decrease.

2. I just set CAV as single zone with reheat and constant Volume, is that right?

Any suggestion should be appreciation.

Thanks a lot.

Joey