[Bldg-sim] Thermal Bridging for LEED compliant energy models

[Christian Cianfrone]

Can be found here:

bchydro.com/thermalguide

Hopefully there will be a high resolution version available online shortly as one consolidated file.  I will post to this group when available.


Christian Cianfrone, M.A.Sc., P.Eng., LEED® AP BD+C
Principal, Building Energy Practice Lead
ccianfrone at morrisonhershfield.com<mailto:email at morrisonhershfield.com>

[Description: Description: Description: Description: Description: logo4email4]<http://www.morrisonhershfield.com/Pages/default.aspx>

Suite 310, 4321 Still Creek Drive  |  Burnaby, BC  V5C 6S7
Dir: 604 454 2006  |  Cell: 604 376 1315  |  Fax: 604 454 0403
morrisonhershfield.com/sustainability


From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Francesco Passerini
Sent: Wednesday, December 02, 2015 9:21 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Thermal Bridging for LEED compliant energy models

Hello, where could I find a copy of the “MH Building Envelope Thermal Bridging Guide”, please?
I have never received comments related to thermal bridges (I modeled 7 buildings that were certified LEED).
Generally I model only the thermal bridges that are relative to a material discontinuity (e.g. a pillar in the exterior wall).
Consider that in some cases the value of the thermal bridge could be negative (generally if you consider the exterior dimensions of the envelope).
With Regards
Francesco Passerini



---------- Messaggio inoltrato ----------
From: Volkan Ozdemir <ozdvolkan at gmail.com<mailto:ozdvolkan at gmail.com>>
To: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Cc:
Date: Tue, 1 Dec 2015 23:49:45 +0300
Subject: [Bldg-sim] Thermal Bridging for LEED compliant energy models
Hello,

Could some of you more experienced folk help me understand thermal bridging modeling for LEED compliant energy simulation?

I use “MH Building Envelope Thermal Bridging Guide” for modeling thermal bridges in proposed design. However, there are couple of points I`m not sure about. I use clear field values from Appendix A as Appendix A already accounts for thermal bridging present in clear field envelope assemblies.


1.       Should I include Floor Slab Linear transmittance values in my proposed model? Even if floor slab edge is fully insulated on exterior, there will be some thermal bridging effect due to shelf angle use. However, this seems unfair for the proposed design as baseline design doesn`t take into account floor slab edge thermal bridging effect.

2.       Similarly, baseline model doesn`t account for “Glazing Transition Linear Transmittance”, “Parapet Linear Transmittance”, and “Corner Linear Transmittance”. Do I have to model these 3 thermal bridging effects on my proposed model, it seems rather unfair compared to baseline model?

3.       Did you ever receive any comments from LEED reviewers about thermal bridging, could you share your correspondence?

Already now thanks for help,
--
Volkan Ozdemir

_______________________________________________
Bldg-sim mailing list
Bldg-sim at lists.onebuilding.org<mailto:Bldg-sim at lists.onebuilding.org>
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20151218/9df57dc8/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 2368 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20151218/9df57dc8/attachment-0003.jpg>