[Equest-users] LEED review comments

[Robby Oylear]

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, LEEDR AP

Mechanical Engineer

direct: 206.788.4571

cell: 206.354.2721

www. <http://www.rushingco.com/> 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] 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, LEEDTM AP



CH2M HILL

Industrial & Advanced Technologies

Portland, OR 97201

e: heather.hardie-hill at ch2m.com





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