[Equest-users] Questions regarding baseline envelope

[Shaun Martin]

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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