Fareed, What are the statements your looking for clarification on? If your project is an NC project, you should do one energy model for the facility. You'll have a baseline case and a proposed design case. Look up some past posts on this forum and CIRs about existing building modeling. I want to say 90.1 allows the baseline to be modeled one of two ways: either as the existing building, or as the 90.1 baseline as defined per the standard. Not sure on this - but a little research should clear it up.
Shariq,
The only baseline is the 90.1 baseline. G1.2 requires compliance with
sections 5,6,7,8,9, and 10 while applicability criteria in 90.1 section
4.2.1.2 and 4.2.1.3 indicates that additions and alterations to existing
buildings must comply with sections 5,6,7,8,9,and 10 or 11. So through
the commutative property of ASHRAE logic, the Appendix G baseline
applies to existing buildings and only to the actual addition or
alteration that is being considered under 90.1.
Regards,
Stephen
Fareed,
You should model your building as one building and prorate the LEED
score card.
The big thing to remember here is that for the existing portion of the
building you are able to compare your design to the existing envelope
(walls, windows, roof, etc) regardless of the scope of work as indicated
in Appendix G. However, for the new portion of your building you will
need to compare the envelope to ASHRAE 90.1 as if it were any other new
construction.
ARTURO HERNANDEZ, Mechanical Engineering
I think in your original question you were mostly confused of the rating
system this would be your LEED score card based on your %.
Points
New
Old
77%
34%
Pro-rated Points
1
10.5%
3.5%
8.1%
1.2%
9.3%
2
14.0%
7.0%
10.8%
2.4%
13.2%
3
17.5%
10.5%
13.5%
3.6%
17.0%
4
21.0%
14.0%
16.2%
4.8%
20.9%
5
24.5%
17.5%
18.9%
6.0%
24.8%
6
28.0%
21.0%
21.6%
7.1%
28.7%
7
31.5%
24.5%
24.3%
8.3%
32.6%
8
35.0%
28.0%
27.0%
9.5%
36.5%
9
38.5%
31.5%
29.6%
10.7%
40.4%
10
42.0%
35.0%
32.3%
11.9%
44.2%
ARTURO HERNANDEZ, Mechanical Engineering
Sorry it should be
Points
New
Old
34%
77%
Pro-rated Points
1
10.50%
3.50%
3.57%
2.70%
6.27%
2
14.00%
7.00%
4.76%
5.39%
10.15%
3
17.50%
10.50%
5.95%
8.09%
14.04%
4
21.00%
14.00%
7.14%
10.78%
17.92%
5
24.50%
17.50%
8.33%
13.48%
21.81%
6
28.00%
21.00%
9.52%
16.17%
25.69%
7
31.50%
24.50%
10.71%
18.87%
29.58%
8
35.00%
28.00%
11.90%
21.56%
33.46%
9
38.50%
31.50%
13.09%
24.26%
37.35%
10
42.00%
35.00%
14.28%
26.95%
41.23%
ARTURO HERNANDEZ, Mechanical Engineering
MIME-Version: 1.0 From: Shariq_Ali at URSCorp.com To: "Stephen Smith" Cc: Date: Mon, 2 Nov 2009 17:15:26 -0500 Message-ID: X-Mailer: Lotus Domino Web Server Release 6.5.6FP1 HF268 March 18, 2009 X-MIMETrack: Serialize by Notes Server on MAIL110A/URSCorp(Release 6.5.6FP1 HF268|March 18, 2009) at 11/02/2009 05:15:26 PM, Serialize complete at 11/02/2009 05:15:27 PM, Itemize by Notes Server on MAIL110A/URSCorp(Release 6.5.6FP1 HF268|March 18, 2009) at 11/02/2009 05:15:27 PM, Serialize by Router on SMTP113/URSCorp(Release 6.5.6FP1 HF231|November 04, 2008) at 11/02/2009 05:12:31 PM, Serialize complete at 11/02/2009 05:12:31 PM Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/html; charset=ISO-8859-1