[Bldg-sim] G3.1.2.5 Clarification

Grammy grammy.hkust at gmail.com
Thu Oct 28 06:32:45 PDT 2010


In my opinion, the exception is means that keep the "design value" of OA
same in both proposed and basline, but use DCV only in proposed.

Because DCV can modify OA volume by the number of people in zone, and the OA
requirement is dynamics in simulation - which is too hard to keep baseline
same with, and also should not keep the same, if not where  does the saving
come from?

On Thu, Oct 28, 2010 at 9:24 PM, Paul Riemer <Paul.Riemer at dunhameng.com>wrote:

>  Section G.3.1.2.5 in 90.1-2007 has added an exception to the "shall be
> the same" for models with demand controlled ventilation in the proposed that
> is not required by Section 6.4.3.9.
>
>
>
> That alone is kind of confusing since it does not address what the values
> should be when they are allowed to not be the same.
>
>
>
> I think they are trying to resolve the intersection of projects that use
> more OA than Std 62.1 and utilize demand controlled ventilation.
>
> The most recent Trane Engineers broadcast promised more changes coming to
> this section (as addendum DA?) but I do not have anything published to
> reference.
>
>
>
> Paul Riemer
>
> Dunham
>
>
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Kingsley, Michael
> L.
> *Sent:* Thursday, October 28, 2010 7:50 AM
> *To:* Grammy; Jaigath Chandraprakash
>
> *Cc:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] G3.1.2.5 Clarification
>
>
>
> I agree.  Standard 61.1 sets the minimum acceptable ventilation rate.  The
> design ventilation rate can be higher, and the baseline rate should be the
> same as the real design.
>
>
>
> Best regards,
>
>
>
> Mike
>
>
>
> *Michael L. Kingsley, PhD, PE, LEED AP *| R. W. Beck, An SAIC Company
>
> Senior Engineer/Project Manager
>
> Energy, Environment & Infrastructure Solutions
>
> office: 315.437.1869 x205 | mobile: 315.373.4081
>
>
>   ------------------------------
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Grammy
> *Sent:* Thursday, October 28, 2010 8:38 AM
> *To:* Jaigath Chandraprakash
> *Cc:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] G3.1.2.5 Clarification
>
>
>
> In my opinion:
>
>
>
> For LEED, the OA should increase 30% first. This is the propose
> requirement.
>
>
>
> Then for energy model, the baseline model should equal to proposed, which
> means the baseline OA is also 30% more than 62.1 requirement.
>
>
>
> On Thu, Oct 28, 2010 at 6:07 PM, Jaigath Chandraprakash <
> cjaigath at yahoo.com> wrote:
>
> Hello,
>
>
>
> G3.1.2.5 states that minimum ventilation rates will be the same for
> proposed building and baseline building. Does it mean that if my building
> design OA rate is increased by 30%, my model will still be based on the
> minimum OA required by 62.1 and is still equal to the baseline building OA?
> Meaning my proposed building wont be penalized by supplying more OA?
>
>
>
>
>
> Thanks in advance.
>
>
>
>
>
> Jaigath
>
>
>
>
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