How to model VAV boxes and Parallel PIU boxes in one RTU

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Hello all,

I?m working on a CI project that its C&S had a RTU with VAV boxes.
The interior zones in the CI (proposed design) use the same RTU but with
series fan power VAV boxes. To model this project correctly per Appendix G
(for EAc3.1 credit) should I select PUI system and then change the terminal
type of C&S zones from parallel PIU to standard VAV terminal or there are
other ways to model this CI project in eQUEST?

Thank you for your help,
Morteza

Morteza Kasmai's picture
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Hi Brian,

For EAp2 we have to use Section 11 but to achieve EAc1.3 (Optimize Energy
Performance ? HVAC) there is an option that allows you to use Appendix G.
Following paragraph is from page 171 of the reference guide.

Thanks,

Morteza

[image: Inline image 1]

Morteza Kasmai's picture
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Are you sure that you can use appendix G for CI? I thought that CI
required that you use the Energy Cost Budget Method (ie chapter 11).

*Brian Davis, PE, CEM*
Dwyer Engineering
552 Fort Evans Road NE
Suite 200
Leesburg, VA 20176
703-777-5988 x110 (office)
703-439-2588 (fax)
304-582-7689 (cell)
www.dwyer.com

Brian Davis's picture
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I truly appreciate if anyone provides some feedback on my question below?

Thanks,

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