[Equest-users] LEED review comments

Rob Hudson rdh4176 at gmail.com
Wed Jun 16 08:10:50 PDT 2010


For a few of our firms LEED models, we tabulated the lighting values for the
baseline and the changes made for the proposed model when they were asking
for more information.  In my experience, provide as much supporting
documentation in the form of tables and lists as possible to eliminate any
confusion with their template.

-Rob Hudson

On Wed, Jun 16, 2010 at 10:23 AM, Robby Oylear <robbyo at rushingco.com> wrote:

>  Sam & Heather,
>
>
>
> Just a comment on #1, but according to ASHRAE 90.1-2004 section 5.8.2.4
> (section 5.4.2, a mandatory provision, refers you to this section) the
> U-factor of all fenestration shall be determined either by NFRC 100 or for
> vertical fenestration taken from table A8.2.
>
>
>
> NFRC testing is essentially a requirement of ASHRAE 90.1-2004.  It is not
> enough to take a center of glass value and add some framing to it, letting
> eQUEST calculate your assembly U-value.
>
>
>
> Robby Oylear, LEED® AP
>
> *Mechanical Engineer*
>
> direct: 206.788.4571
>
> *cell: 206.354.2721*
>
> *www.*rushingco.com <http://www.rushingco.com/>
>
>
> On 6/15/10 1:27 PM, "Sam Mason" <sam.mason at atelierten.com> wrote:
>
> Heather,
> I hope your first EAc1 review doesn’t discourage you and I understand
> reaching out for guidance.
>
> 1.      It sounds like you did indeed model frames so I would just provide
> the additional information on the conductance of the frames and build a
> Window5 model to determine the assembly U-value and include both for the
> reviewer.
>
> 2.      While not the strangest comment I’ve seen the GBCI, it is up there
> for random and your response seems okay. However, is the percentage of
> lighting end-use energy extremely high for the project or is there another
> reason they state for making this comment? Just be thorough in your
> response.
>
> 3.      Pumps and auxiliary energy  includes at least three things: pumps,
> furnace pilot lights, and internal energy sources defined as a space load
> that use electricity or natural gas.  Without seeing your inp files, hard to
> say though.
>
>
> Good luck. It is hard to provide much more help without knowing more about
> the project but hopefully this will get you started.
>
> Sam
>
> --
> Sam Mason
> Atelier Ten
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [
> mailto:equest-users-bounces at lists.onebuilding.org<equest-users-bounces at lists.onebuilding.org>]
> *On Behalf Of *Heather.Hardie-Hill at CH2M.com
> *Sent:* Tuesday, June 15, 2010 1:09 PM
> *To:* eQUEST-users at onebuilding.org
> *Subject:* [Equest-users] LEED review comments
>
>
> Hello eQuest Users!
>
>    I realize that this is an eQuest users forum and not necessarily a LEED
> help forum but from reading past posts it sound like many of you have quite
> a few LEED projects under your belts and I could really use some
> advice/help. I just received my first EAc1 LEED review back and there are 16
> comments. Is that normal? I want to make sure that I understand how eQuest
> is working for a few of these comments so that I can answer them completely
> and correctly.
>
>
>
> so here are my review comment/questions:
>
>    1. "The Proposed windows were modeled with a U-value of 0.29, which
>    does not appear to account for the impact of the window frames on the whole
>    assembly as required by ASHRAE modeling protocol."
>       - The U-Value of 0.29 is indeed the center of glass U-Value however
>       I included frame conductance and frame width in the model.
>       - Is that enough to account for the "whole assembly" U-Value?
>       - or do I need to find a published whole assembly U-Value for the
>       specified window?
>       - If I do need the whole assembly U-Value, then should I remove the
>       frame information from the model?
>    2. "Please confirm that the energy consumption attributed to “Area
>    Lights” on Table 1.8.1 and 1.8.2 represents internal lighting energy
>    consumption and demand or provide a narrative describing any alternative
>    uses."
>       - the area lights information came from the "Ambient Lights" column
>       of the Annual Enduse Summary... so I would say yes, it represents the
>       lighting energy consumption and demand. Right?
>    3. "Please provide a narrative to describe the end use for the modeled
>    “Pumps & Auxiliary” as shown on Table 1.8.1 and 1.8.2"
>       - I have not been able to figure out exactly what is contributing to
>       this load (besides the pumps of course). What, according to eQuest, is
>       considered "Auxiliary"?
>
> I think that is it for now... I'm sure as I start making adjustments that I
> will have additional questions. (The building runs off of a central chiller
> plant so I've used the "Required Treatment of District Thermal Energy in
> LEED-NC version 2.2" document as a guideline and haven't quite wrapped my
> head around the comments related to that)
>
>
>
> I know that one of the first things you might ask is to see my .inp and
> .pd2 files... unfortunately it is for a confidential client and I am unable
> to share that information.
>
>
>
> One more quick thing... Although I do not regularly contribute to the forum
> I try to read all of the threads as they come through (admittedly, I'm a
> little behind right now). It is comforting to know that I am not the only
> one having issues with energy modeling and eQuest. It is also comforting
> knowing that I can ask you questions and I don't have to bang my head
> against a wall trying to figure it all out on my own! so, thanks in advance
> for the help!!!!
>
>
>
> *Heather Hardie-Hill
> *
> *EIT, LEED**TM** AP
> *
>
>
> *CH2M HILL
> *
> *Industrial & Advanced Technologies
> *
> Portland, OR 97201
>
> e: heather.hardie-hill at ch2m.com
>
>
>
>
>
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-- 
Rob Hudson
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