[Equest-users] DCV application (Baseline minimum OA)

[DongEun Kim]

Thank you Brendan!

Your answer helps me a lot !

Can I ask you questions regarding your answer?

1.When you say 'cfm per area,' does it mean OA ?
2. And, why should we set 'cfm per area' if we already input cfm/person ?

I been inputting only cfm/person when trying DCV... maybe I 've been doing
it wrong?

Thank you in advance !!
2013/7/23 Hall, Brendan <BHall at karpinskieng.com>

>  When applying DCV where it’s not required, the baseline should be set
> constant at the 62.1 minimum and the proposed should be set as designed. If
> you aren’t seeing any savings, make sure you have the cfm per person and
> the cfm per area set at the zone level. That is what is used to vary the
> amount of OA needed at the system level based on the occupancy schedule.
> There are a couple ways to input DCV but that is the one that seems to work
> most consistently for me. Hope that helps.****
>
> ** **
>
> ** **
>
> Brendan Hall,  PE, LEED AP BD+C****
>
> Engineer, Mechanical****
>
> karpinski
> ENGINEERING
> 3135 Euclid Avenue
> Cleveland, OH  44115
> P  216.391.3700 Ext 3111
> E  *bhall at karpinskieng.com*
> W *www.karpinskieng.com <http://www.karpinskieng.com/>*****
>
> ** **
>
> ** **
>
> ** **
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *DongEun Kim
> *Sent:* Tuesday, July 23, 2013 3:55 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] DCV application (Baseline minimum OA)****
>
> ** **
>
> Hi All!****
>
>  ****
>
> I am currently involved in a LEED project and the building applies DCV
> system.****
>
>  ****
>
> My question is, can I  apply the same 'OA cfm/person' for the Baseline
> building?****
>
>  ****
>
> This might seem to be a silly question as we all know ASHRAE 90.1
> Appx.G requires proposed and baseline building to****
>
>  ****
>
> have same 'minimum OA.'  ****
>
>  ****
>
> But I remember reading some people say they had LEED Review comment that
> says, when proposed has DCV, baseline should have its minimum OA as
> determined by ASHRAE 62.1.****
>
>  ****
>
> This is an important issue in that when I follow above review comment and
> put minimum OA per ASHRAE 62.1, there's almost no saving  achieved from
> applying DCV.   :(****
>
>  ****
>
> Any comments equester?****
>
>  ****
>
> Kim****
>
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