[Bldg-sim] G3.1.2.5 Clarification

[Paul Riemer]

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<mailto: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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