[Equest-users] Existing Building - New Windows

[Harmon, Amy]

Hi Ross,

Thanks for the help.

The existing building is poured concrete with face brick, the look of the building is very dated.  So, the architect has added the metal panels.  We have looked at making these insulated metal panels, but the budget just can't afford this.  We are over budget the way it is.

This building is connected to a campus chilled and heating system...the university has provided us with approximate utility costs for steam, chilled water, gas, electric, etc.  Because my proposed case will be set up with chilled and steam heaters, I'm somewhat fuzzy on my baseline.  Does my baseline need to show the chilled and steam meters?  I have a residential building, system 1 (PTAC), do I set my baseline up to show DX cooling and HW boilers?

We will be submitting for LEED Certified.  The architect had toyed with which LEED category to submit under NC (Major Renovations), CS or CI.  They finally agreed upon NC.

Thanks,
Amy


From: Ross Farris [mailto:RFarris at glumac.com]
Sent: Wednesday, February 06, 2013 4:40 PM
To: Harmon, Amy; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Existing Building - New Windows

Hi Amy,

For the windows, your baseline model should incorporate the existing conditions per table G3.1 of ASHRAE Std. 90.1.

The metal panels are just being added to the exterior of the existing skin? They are not likely to do anything to the existing wall U-value. You could do a hand calculation to determine the overall U-value with the addition of the panel, but I imagine it will be negligible. However, it would affect the absorptance/reflectivity. Depending on what percentage of the wall is being covered, you could look into creating two wall assemblies: one with the existing skin, and one with the metal panels on the outside (there is a material for "steel siding") and model two different Ext. Colors (absorpt.). Table 3 in the help file has Solar Absorptance of various exterior surfaces. This is a lot of work for probably very little variation in model results.

I am curious, if you are considering going LEED for this project, given the amount of design, does it fall under the NC (Major renovation) category? If it is under commercial interiors, I would imagine you will see more LEED points for EAc1.3 through option 1 than you will by building an energy model for LEED.

Regards,

Ross Farris, CEA
Energy Analyst
Regional Energy Director

[http://www.glumac.com/glumacsig.gif]<http://www.glumac.com/>
________________________________
[cid:image001.png at 01CC45FA.A3365810]<http://www.twitter.com/glumacengineers>[cid:image004.jpg at 01CC98A3.24F9BEA0]<http://www.facebook.com/pages/Glumac/213797265436>[cid:image002.jpg at 01CC45FA.A3365810]<http://www.linkedin.com/company/34034>
150 California Street, 3rd Floor
San Francisco, CA 94111
T.  415.398.7667 ext.4083  F. 415.398.0596
Thinking. Inside the building.

From: Harmon, Amy [mailto:aharmon at sbmce.com]
Sent: Wednesday, February 06, 2013 12:50 PM
To: equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: [Equest-users] Existing Building - New Windows

I've been scouring the archives for answers, but did not find my exact scenario.

I have a 10 story dormitory that was built in the early 60's.  We're looking to submit the building to LEED.  We're removing the existing 2 pipe FCU system serving the perimeter rooms as well as an AHU that conditions the core spaces for the whole building, with a 4 pipe FCU system along the perimeter rooms (natural windows via operable windows) and an AHU for the core spaces in the building.

A couple questions, the architect is replacing all the windows in the building.  Since the proposed case windows will be what we're designing to, what windows do I use for my baseline...existing as it stands today or the ASHRAE minimum found in Table 5.5?

The architect is also adding metal panels to portions of the building to dress it up, how do you go about adding the metal panels (UNINSULATED) to the existing wall used in the baseline?

Thanks for helping!


Amy Harmon
Mechanical Engineer
Scheeser Buckley Mayfield LLC
1540 Corporate Woods Parkway
Uniontown, OH 44685
Office: (330) 896-4664 x107
Direct: (330) 526-2707
Fax: (330) 896-9180
aharmon at sbmce.com<mailto:aharmon at sbmce.com>
www.sbmce.com<http://www.sbmce.com/>

Columbus Office (614) 448-1498
ü Please consider the environment before printing this email.
This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments.
Thank you

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130207/84484c23/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 2618 bytes
Desc: image001.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130207/84484c23/attachment-0008.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 738 bytes
Desc: image002.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130207/84484c23/attachment-0009.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 718 bytes
Desc: image003.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130207/84484c23/attachment-0010.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 734 bytes
Desc: image004.jpg
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130207/84484c23/attachment-0011.jpg>