<html>
Going by the Energy Cost Budget Method of compliance in 90.1 there are
relatively few parameters which can be changed. However, the rules
are somewhat different for a LEED comparison. 90.1 does not allow a
comparison between radically different HVAC systems for example, a LEED
comparison does. Check out the pertinent sections in the LEED
Reference Guide for a complete discussion of what is and is not allowed
in a LEED comparison, it is different than a strict 90.1
comparison. This would account for the difference in the 35% going
by 90.1 and the higher values in LEED. We just submitted a project
that exceeded 90.1 by 55% using the LEED allowed methods of
comparison.<br>
<br>
At 06:45 PM 6/5/2001 -0600, you wrote:<br>
<blockquote type=cite class=cite cite><font face="arial" size=2>We have
been involved locally with trying to use ASHRAE 90.1, both 1989 and 1999
as a metric in new building design - i.e., `xx% better than code minimum'
for both LEED compliance and for a State buildings program. I know there
are a number of similar programs and initiatives throughout the country.
I am also slated to give a presentation on "Issues Around Using
ASHRAE 90.1-1999 as a Metric" at the ASHRAE Annual meeting in June
(Seminar 28). </font><br>
<font face="arial" size=2>I'm looking for two things - first what
experiences have people had with `exceeding' the code by x%? I've heard
rumors that a reputable simulation firm said 35% can't be done if you
strictly interpret the code. LEED provides credit for 40% and 50%
improvements. We've been using a completely arbitrary target of 35%,
which with a little c o d e stretching seems to be
obtainable. What is realistic based on your experience?</font><br>
<font face="arial" size=2>Second, I would like to get some feedback on
the whole `using 90.1 as a metric` issue that I might include in my
presentation to round it out a little. </font><br>
<font face="arial" size=2>Any feedback would be appreciated and of course
I would credit anything I used in the Seminar. </font><br>
<br>
<font face="arial" size=2>Mark E. Case, P.E.</font> <br>
<font face="arial" size=2>etc Group, Inc.</font> </blockquote><br>
<x-sigsep><p></x-sigsep>
====================================================<br>
Marcus B.
Sheffer
energy & environmental consulting<br>
Energy
Opportunities
717-292-2636<br>
1200 E Camping Area
Road Fax:
717-292-0585 <br>
Wellsville, PA USA 17365-9783
sheffer@sevengroup.com<br>
a Seven Group member company
<a href="http://www.sevengroup.com/" eudora="autourl">www</a>.sevengroup.<a href="http://www.sevengroup.com/" eudora="autourl">com</a>
<br>
====================================================<br>
</html>