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VAV: Fan powered box or no fan duct

The fan powered box has advantage to reduce reheat energy but added more fan energy, especially series fan powered box. From simulation, I often see negative effect using fan powered box compared to single ducted box with reheat.

I wonder if anyone has different results/opinion on this. I really dont see the real advantage of fan powered box.

Thanks!

VAV: Fan powered box or no fan duct

The fan powered box has advantage to reduce reheat energy but added more fan energy, especially series fan powered box. From simulation, I often see negative effect using fan powered box compared to single ducted box with reheat.

I wonder if anyone has different results/opinion on this. I really dont see the real advantage of fan powered box.

Thanks!

VAV: Fan powered box or no fan duct

The fan powered box has advantage to reduce reheat energy but added more fan energy, especially series fan powered box. From simulation, I often see negative effect using fan powered box compared to single ducted box with reheat.

I wonder if anyone has different results/opinion on this. I really dont see the real advantage of fan powered box.

Thanks!