[Bldg-sim] LEED & Natural Ventilation

[Chris]

And how did you model the natural ventilation?
In summer when external temperatures are above the room setpoint natural
ventilation during the day would not provide any cooling.

On Thu, Jul 29, 2010 at 11:19, Rimes, Christie <Christie.Rimes at wspfk.com>wrote:

>  I am currently doing a naturally ventilated building for LEED and I
> believe that if the space is achieving indoor temperatures between the given
> set point using natural ventilation than the mechanical system energy is 0
> for the proposed design. Any hours where natural ventilation can’t achieve
> indoor temperatures within the set points, a mechanical system needs to be
> modeled even if there isn’t one in the proposed building. This helps keep
> the unmet hours within the requirements for LEED.
>
>
>
> Cheers,
>
>
>
> [image: Christie Rimes, Building Simulation Analyst WSP Flack + Kurtz 405
> Howard Street, Suite 500 San Francisco, CA 94105 Direct: 415.402.2727 Main
> Tel: 415.398.3833 Fax: 415.433.5311 website: http://www.wspfk.com vCard:
> http://vcards.wspfk.com/vcardloader.php?filename=flackkurtz-christie-rimes-wspfk-com-1255981339.vcf
> image:]
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Chris
> *Sent:* Thursday, July 29, 2010 11:13 AM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] LEED & Natural Ventilation
>
>
>
> All,
>
>
>
> we regularly design and model buildings which rely in part on natural
> ventilation as a source of free cooling. The issue we are often faced with
> is how to capture this benefit when performing a LEED Appendix G analysis.
> Appendix G states that all conditioned spaces must have BOTH heating and
> cooling. We would like to remove mechanical coolig in the proposed design
> building and thus gain benefit when comparing to the mechanical cooling
> system in the reference baseline building.
>
>
>
> Has anyone tackled this issue and come to a satisfactory resolution?
>
>
>
> Thanks for your help.
>
>
>
> --
> Chris Flood BSc (Eng)
> Senior Building Analyst & Energy Modeller
>



-- 
Chris Flood BSc (Eng)
Senior Building Analyst & Energy Modeller
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