[Bldg-sim] LEED base design

Nick Caton ncaton at smithboucher.com
Tue May 22 08:46:55 PDT 2012


90.1 requires the baseline to match the proposed model (I normally match exactly, but some variance may be acceptable, as described).  The proposed model should be representative of the actual design (I practice matching exactly again, but Appendix G & the 90.1 Users Manual allow for and contextually encourage some flexibility in “representation”).  I do not understand fully whether your models are following the standards.

I gather your proposed model was specified with 40 zones and a 10 zone baseline was generated…  I also assume plenums are not central to this difference since you’re still asking after my first reply…  If those speculations are correct, I would personally go back to building a baseline directly from the proposed model as the compliance feature does not sound like it’s behaving for you.

Apologies, but I need to shift my focus away from the lists today – terribly busy actually.  Please address any further queries to the whole list if needed!

Thanks,

~Nick

[cid:489575314 at 22072009-0ABB]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com

From: Hussein Abaza [mailto:ahussein at spsu.edu]
Sent: Tuesday, May 22, 2012 10:22 AM
To: Nick Caton
Subject: Re: [Bldg-sim] LEED base design

Thank you so much , Nick, for your answer. The LEED compliance gerated enough zones to satisfy ASHDAE 90.1, 2007 ( 10 zones). but the actual design has much more zones ( 40 zones). the question is: will the 10 zones model is considered the base design for LEED or should I use the 40 zone mode with ASHARE 90.1 minimum insulation, HVAC efficiency etc applied to it as the base design.
Thank you again

________________________________
From: "Nick Caton" <ncaton at smithboucher.com<mailto:ncaton at smithboucher.com>>
To: "Hussein Abaza" <ahussein at spsu.edu<mailto:ahussein at spsu.edu>>, "bldg-sim" <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>>
Cc: bldg-sim at onebuilding.org<mailto:bldg-sim at onebuilding.org>
Sent: Tuesday, May 22, 2012 11:10:39 AM
Subject: RE: [Bldg-sim] LEED base design
Hi there,


0.       I continue to generally advise against relying on the eQuest LEED compliance features at present.  This feature can be useful for one’s workflow, but only for the sum of modelers willing to carefully review the corresponding guidance that comes with eQuest 3.64.

1.       Strict reading of 90.1 language is the models should match.  If you’re getting at plenum zones however, it could be moot/appropriate for the models to differ in consideration of the system types and their respective return air path behavior.

2.       I haven’t yet) observed completely wrong constructions generated by the compliance feature myself, but can assert my past LEED reviewers have permitted some variance from what’s required/implied for baseline constructions in 90.1.  I feel two competent modelers can come up with different ‘correct’ interpretations for the same baseline construction.  That said, see point 0.  I would manually revise constructions for compliance.  If they really are way off, it could be productive to share your findings with members of the DOE2 development team (findable through the list archives).


Adding to point 0.:  Your “should I manually change…” query suggests you may not realize the compliance features of eQuest do not purport to do all work associated with a baseline model.  Review the associated guidelines carefully!  Help > Tutorials and Reference > LEED Analysis

[cid:489575314 at 22072009-0ABB]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com<http://www.smithboucher.com>

From: bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Hussein Abaza
Sent: Tuesday, May 22, 2012 9:29 AM
To: bldg-sim
Cc: bldg-sim at onebuilding.org<mailto:bldg-sim at onebuilding.org>
Subject: Re: [Bldg-sim] LEED base design


Basic LEED questions. I am using the Compliance analysis in eQuest o generate the base design and my questions are
1- Does the base design has to have the same number of zones as the actual design ( the compliance analysis is generating less zones).
2- The compliance analysis generated R values much higher than what ASHRAE 90.1-2007 calls for. should I manually change them
Any help will be greatly appreciated
Thank you
________________________________
From: "Jason Glazer" <jglazer at gard.com<mailto:jglazer at gard.com>>
To: bldg-sim at onebuilding.org<mailto:bldg-sim at onebuilding.org>
Sent: Sunday, May 20, 2012 4:59:25 PM
Subject: [Bldg-sim] SPC209 Energy Simulation Aided Design Meeting in San        Antonio

ASHRAE SPC 209 Energy Simulation Aided Design for Buildings
Except Low-Rise Residential Buildings will be having our
first meeting during the upcoming San Antonio ASHRAE conference:

San Antonio
Tuesday June 26 8:00am - Noon
Convention Center at River Level Room 006B

For easy access to meetings in 006 follow signs to
convention center down escalator past the Hyatt restaurant
and enter the convention center, rooms are straight down the
hallway.

Jason
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