[Equest-users] DOAS in baseline

[David Eldridge]

If this is for a LEED project, Table 3.1, p28 of the USGBC “AEMG” says no
separate outside air handling unit for baseline.



Perhaps the 90.1 User’s Manual may also clarify, I don’t have 2007 UM in
front of me.



David

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David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, HBDP

*Grumman/Butkus Associates*

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*From:* equest-users-bounces at lists.onebuilding.org [mailto:
equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Bishop, Bill
*Sent:* Thursday, January 27, 2011 10:35 AM
*To:* Susan F; Nick Caton
*Cc:* equest-users at lists.onebuilding.org
*Subject:* Re: [Equest-users] DOAS in baseline



Susan,



My short answer is no, there is nothing in Appendix G that requires you or
allows you to model a DOAS system that preconditions outside air. As you and
Nick said, first use G3.1.1 for the system type. Then refer to G3.1.2.10 to
determine if exhaust air energy recovery is required. Keep minimum outside
air requirements identical between the baseline and proposed per G3.1.2.5.
If the DOAS penalizes your proposed design from an energy perspective, check
Table 6.5.3.1.1B for potential adjustments to your baseline fan pressure
drop, per the note to Table G3.1.2.9.



Regards,

Bill
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