VAV: Fan powered box or no fan duct

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asked 10 years ago

wangh
395 ●4

updated 9 years ago

__AmirRoth__

4446 ●5 ●17 http://bleedinggreenna...

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!

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answered 10 years ago

Lincoln

1521 ●1 ●11 http://www.kw-engineering.com/

I typically see fan-powered boxes serving perimeter zones to augment higher heating/cooling loads. Using a series terminal unit allows you to reduce the amount of static on your central AHU (0.2" w.g. instead of 0.5" w.g.).

Here's some literature from Titus that summarizes their advantages

link

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Asked: 10 years ago

Seen: 265 times

Last updated: Mar 23 '15

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VAV: Fan powered box or no fan duct