[Equest-users] Questions regarding baseline envelope

[John Aulbach]

Chris:

That is why I stay in the DD Wizard to building the ASHRAE 90.1 model;, so that all of what you speculate is the easier way comes true.

THEN, I can go to the Detail Edit and put in my lighting watts/sf, any process loads, and outside lights. Done with the BASE model.

NOW I make a copy of the Base, call it Proposed, then make all the changes to make the Proposed model.

In THIS way, I have my Base model NAILED. Most important to those LEED reviewers.

John R. Aulbach, PE


On Thursday, October 2, 2014 4:38 PM, Chris Baker <CBaker at cci-alliance.com> wrote:
 


 
The model is for LEED approval.  
The proposed building is done, the baseline building is in progress in equest.
 
To bring the building into compliance, however, what is the methodology most commonly used for the building envelope in particular when creating the baseline model?
 
For example, do I need to manually change all exterior walls to “steel framed” above grade walls to be in compliance with table 5.5-8?  
 
Do all of these items need to be “manually” changed to the equivalent on table 5.5-8?  Roof & Insulation, Above grade walls & insulation, Floors to steel joist, etc… 
 
And if so, it would be faster to go back into the DD wizard for this, correct?
 
Thanks!
 
-Chris
 
 
From:Shaun Martin [mailto:smartin at shaunmartinconsulting.com] 
Sent: Thursday, October 02, 2014 1:45 PM
To: Chris Baker; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Questions regarding baseline envelope
 
Hi Chris,
 
Your question doesn’t state why you are doing the models.  If you want to show code, or LEED etc, compliance then you use Table 5.5.8.  If you need to show energy savings, for a utility program incentive or similar need, then you would use existing conditions.
 
Shaun 
 
From:Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Chris Baker
Sent: Thursday, October 02, 2014 2:04 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Questions regarding baseline envelope
 
So my proposed building is done.  I’m working on my baseline building and a little confused on how to model the baseline building envelope/exterior.
 
This project is a renovation in climate zone 8.  Most of the interior walls remain.
 
All the original roof structures remain , All exterior walls remain.  No new exterior walls were constructed.
 
All exterior walls received a 5-1/2” EIFS system.  All roof structures received 8-1/2” foam system buildup with new 2” klip-rib style metal decking.
 
The only thing that didn’t remain on the envelope was the existing decking and all windows and doors got replaced.
 
The proposed building is modeled to reflect all this in equest – it is very close.
 
The building was a chapel and it will remain a chapel (non-residential/religious worship).
 
So here’s the question…
 
In the baseline model, do I model the pre-existing configuration or do I change all the wall systems completely to match Appendix G, table 5.5-8?
 
Table 5.5-8 sais the exterior walls, above grade, should show steel framed.
 
Also, with regard to the roof, would the baseline roof need to be modeled as it was originally, taking into account the energy usage that the building would have had without the foam buildup we added.
 
Or would I need to just go off of table 5.5-8 again? – in my case the baseline would be “insulation entirely above deck” from that table.
 
OR should I just do parametric runs to tweak the baseline values down to be in compliance??
 
What would be an acceptable practice given the nature of the renovation and that the existing building remained?
 
Chris Baker
CCI CAD Drafter
 
 

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