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I assigned a typical VAV system with reheat but there are many heating unmet hours in the core area. After I did further check for node temp as well as air cfm and found:

1) the air cfm is almost fixed all the time, like CAV 2) although I set the sizing air inlet/outlet temp for heating coil in reheat is 13C/35C. However, the heating coil can only heat the air to around 18C, even though the heating is not enough at that time. Therefore, it came out the unmet hours.

Anyone had same problem? Don't know what's wrong with the setup.

Here is the link for my sample model, which is a 5-floor small building with typical 5 zone in each floor: link

I assigned a typical VAV system with reheat but there are many heating unmet hours in the core area. After I did further check for node temp as well as air cfm and found:

1) the air cfm is almost fixed all the time, like CAV 2) although I set the sizing air inlet/outlet temp for heating coil in reheat is 13C/35C. However, the heating coil can only heat the air to around 18C, even though the heating is not enough at that time. Therefore, it came out the unmet hours.

Anyone had same problem? Don't know what's wrong with the setup.

Here is the link for my sample model, which is a 5-floor small building with typical 5 zone in each floor: link