[Bldg-sim] ASHRAE 90.1-App G: Site Shading

[gail]

Even if it is going LEED-NC or Core & Shell, the applicable ASHRAE
Performance Rating Method (ASHRAE 90.1-2004 Appendix G Table G3.1(5)(f))
states that the baseline envelope should be modeled with existing conditions
prior to any retrofit.  The envelope for additions to the existing building
should be modeled with the applicable ASHRAE Building Envelope Requirements
table and corresponding Appendix G Table G3.1(5) requirements.

LEED for existing buildings uses benchmarking for comparison, not energy
modeling.

On Thu, Jun 5, 2008 at 5:27 AM, Kevin Kyte <kkyte at robsonwoese.com> wrote:

>  What if it's an existing building, but the project is going LEED-NC or
> Core and Shell.  Does the baseline get modeled as the existing conditions of
> the building before demo? If a project is going for LEED -existing
> buildings, then the baseline energy model should be with existing
> conditions.  What delegates whether the baseline model should be an ASHRAE
> perpetration or existing conditions?
>
>
>
> Kevin Kyte, LEED AP
>
> RobsonWoese, Inc.
>
> (T) 716-636-1800
>
> (F) 716-636-1856
>
> http://robsonwoese.com <http://robsonwoese.com/index.php>
>
>
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *gail
> *Sent:* Wednesday, June 04, 2008 5:01 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* Re: [Bldg-sim] ASHRAE 90.1-App G: Site Shading
>
>
>
> Appendix G does specifically state that for existing buildings being
> gutted, the Baseline building envelope should be modeled based on the
> existing conditions prior to any revisions that are part of the scope of
> work being evaluated (Table G3.1(5)(f)).  Therefore, if you are modeling
> self-shading and adjacent buildings in the proposed case for an existing
> building, they should also be modeled in the base case for existing
> buildings.
>
> Best Regards,
> Gail Stranske
> CTG Energetics, Inc.
>
> On Wed, Jun 4, 2008 at 1:32 PM, Demba Ndiaye <demba.ndiaye at setty.com>
> wrote:
>
> Eric,
>
>
>
> My understanding is that, regardless of the fact that the building is new
> or existing, there is no specific requirement regarding the modeling of
> neighboring shading objects.
>
>
>
> ______________
>
> Demba Ndiaye
>   ------------------------------
>
> *From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *Eric Studer
> *Sent:* Wednesday, June 04, 2008 3:47 PM
> *To:* bldg-sim at lists.onebuilding.org
> *Subject:* [Bldg-sim] ASHRAE 90.1-App G: Site Shading
>
>
>
> Hello,
>
>
>
> ASHRAE 90.1-2004 Appendix G has a clause pertaining to self-shading of the
> baseline building, but there does not seem to be any explicit direction
> regarding shading from other objects beyond the building envelope (trees,
> buildings, etc).  Should the base case be modeled as being impacted by
> adjacent buildings or other objects?  Would this be different for a new
> building versus an existing building that is being gutted?
>
>
>
> Thanks
>
>
>
> *                                      *
>
>
>
> Eric Studer, PE, LEED AP
> DMI
> 35 Walnut Street
> Wellesley, MA  02481
> Ph:   (781) 431-1100 ext 12
> Fax:  (781) 431-1109
> e-mail:  estuder at dmiinc.com
>
>
>
>
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