Question-and-Answer Resource for the Building Energy Modeling Community

VAV: Fan powered box or no fan duct

asked 2015-03-20 13:27:11 -0600

wangh
395 ●4

updated 2016-01-09 13:51:27 -0600

__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!

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2015-03-23 17:08:40 -0600

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

edit flag offensive delete link

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2015-03-20 13:27:11 -0600

Seen: 216 times

Last updated: Mar 23 '15

Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.

VAV: Fan powered box or no fan duct edit