Hello!

I'm modelling a 49-story building using Design Builder, and it has three separate HVAC systems (the first one on the 16th floor for the first 15 floors, the second is on the 32nd floor for the 17-31 floor and the last is on the 49th floor for the 33-48 floor). So, something I was wondering about is the possibility of designing separately the three groups before mentioned so that I can get the whole energy consumption by summing each energy consumption. I mean, something like “divide and conquer”.
If so, it would be really important for me since It would make my program not only faster but also without many fails because of its heavy size, as long as it is feasible and correct according to LEED. This is my first question.

My second question is the following; in my design I have many floors that are exactly the same, so I would like to know if there is a way to design only one of them and specify somehow that detail and how to specify that I’m assuming that.

Thanks in advance.