I never mentioned am using 90.1 standard.<div>it was a generic question about calculating wwr .</div><div>and if you say its not important to model unconditioned spaces, how do you account for heat transfer between conditioned and unconditioned spaces?</div>
<div><br></div><div>Thanks</div><div>Deepika<br><br><div class="gmail_quote">On Thu, Oct 20, 2011 at 3:33 AM, Pasha Korber-Gonzalez <span dir="ltr"><<a href="mailto:pasha.pkconsulting@gmail.com">pasha.pkconsulting@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">I disagree with both of you.<br><br>First of all, who models Garages in their models anyway? What a waste of time.---this scews the gross floor area, and nothing in a parking garage impacts the HVAC equipment loads of the conditioned spaces....you can always input your garage vent fans and lighting as single exterior load input numbers in your model which simplifies the whole modeling project and billable time spent WITHOUT compromising on the calculations of energy use....<br>
<br>Second of all---poor example for offering windows in a parking garage--this is never real life, and a non-applicable example doesn't "hold water". At least give an example that is comparable to real life situations... Parking garages are either open air, or underground (without fenestration...) Have you ever had a project where Mechanical cooling needed to be provided to a parking garage? I hope not because these are considered transient space types.<br>
<br>If you are modeling your LEED buildings according to appendix G --90.1 you do not include the above grade garage wall area in your gross building WWR calculation.<br><br>FOURTH---Deepika---you are modeling a residential home from your picture you sent us. YOU CANNOT USE ASHRAE STANDARD 90.1 TO MODEL LOW-RISE RESIDENTIAL BUILDINGS!<br>
<br>You are using and interpreting the wrong standard, you need to use ASHRAE Standard 90.2 for Non-commerical Residential buildings. You will need to use this new reference as everything you are referring to does not apply for your project or your project model.<br>
<br>The real answer to your question is the Nebraska Cornhusker football team IS BETTER than the Virgina Tech Hoakies! GO BIG RED!!!!<br>Pasha<div><div></div><div class="h5"><br><br><div class="gmail_quote">On Wed, Oct 19, 2011 at 3:15 PM, deepika khowal <span dir="ltr"><<a href="mailto:deepika.khowal@gmail.com" target="_blank">deepika.khowal@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I agree with James .<div>if its unconditioned space, we should not claim the window area . that way we can have higher WWR for rest of conditioned spaces.<div>
<div></div><div><br><div><br><div class="gmail_quote">On Wed, Oct 19, 2011 at 1:56 PM, James Hansen <span dir="ltr"><<a href="mailto:JHANSEN@ghtltd.com" target="_blank">JHANSEN@ghtltd.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div bgcolor="white" link="blue" vlink="purple" lang="EN-US"><div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I don't think I agree with this advice<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Under ASHRAE 90.1-2007, Section 5.2.1, part of the requirements for the PRESCRIPTIVE method requires that "the vertical fenestration area does not exceed 40% of the gross wall area for each <b><i>space-conditioning category</i></b>". <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">The definition for "space conditioning category" simply says:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> non-residential conditioned space,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> residential conditioned space, and<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> nonresidential and residential semiheated space<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">It doesn't list unconditioned space. Now I know this info is listed in the prescriptive requirements, but if it was my model, and I had a garage that had 100% window area, there is no way I would count that towards the gross WWR, particularly if I was applying for LEED, and these inconsequential windows pushed my WWR above 40% and thus penalized my proposed building. In fact, I might not even model the windows, unless I felt they were going to superheat the garage and start impacting adjacent space cooling loads.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Just my opinion...<u></u><u></u></span></p><p class="MsoNormal">
<span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><div><p class="MsoNormal"><b><span style="font-size:11.0pt;color:teal">GHT Limited<br></span></b><b><span style="font-size:11.0pt;color:#1F497D">James Hansen, P.E., LEED AP</span></b><span style="font-size:10.0pt;color:#1F497D"><br>
Senior Associate<br>1010 N. Glebe Road, Suite 200<br>Arlington, VA 22201-4749<br><a href="tel:703-243-1200" value="+17032431200" target="_blank">703-243-1200</a> (office)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D"><a href="tel:703-338-5754" value="+17033385754" target="_blank">703-338-5754</a> (cell)<br>
<a href="tel:703-276-1376" value="+17032761376" target="_blank">703-276-1376</a> (fax)<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:10.0pt;color:#1F497D"><a href="http://www.ghtltd.com/" title="http://www.ghtltd.com/" target="_blank">www.ghtltd.com</a></span><span style="font-size:11.0pt;color:#1F497D"><u></u><u></u></span></p>
</div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in"><p class="MsoNormal"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> <a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a> [mailto:<a href="mailto:equest-users-bounces@lists.onebuilding.org" target="_blank">equest-users-bounces@lists.onebuilding.org</a>] <b>On Behalf Of </b>PKConsulting<br>
<b>Sent:</b> Wednesday, October 19, 2011 4:04 PM<br><b>To:</b> deepika khowal<br><b>Cc:</b> <a href="mailto:equest-users@lists.onebuilding.org" target="_blank">equest-users@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Equest-users] wwr calculation<u></u><u></u></span></p>
</div></div><div><div></div><div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">It doesn't change for unconditioned or conditioned. It is only a function of gross wall area (ft2) and window area (ft2). Don't think too hard about this. You are looking for a needle in the wrong haystack. This one is straight forward with no tricks...<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">WWR is for whole bldg not space by space.<u></u><u></u></p></div><div><p class="MsoNormal"><br>Pashalu<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt">
<br>On Oct 19, 2011, at 12:20 PM, deepika khowal <<a href="mailto:deepika.khowal@gmail.com" target="_blank">deepika.khowal@gmail.com</a>> wrote:<u></u><u></u></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div><p class="MsoNormal">Thanks Pasha<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">yes , i have been using LV-d report.<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p>
</div><div><p class="MsoNormal">Am confused how it work for an unconditioned space.<u></u><u></u></p></div><div><p class="MsoNormal" style="margin-bottom:12.0pt">Thanks<u></u><u></u></p><div><p class="MsoNormal">On Wed, Oct 19, 2011 at 11:01 AM, PKConsulting <<a href="mailto:pasha.pkconsulting@gmail.com" target="_blank">pasha.pkconsulting@gmail.com</a>> wrote:<u></u><u></u></p>
<p class="MsoNormal">It should be the gross wall area for everything above ground. Use the lv-d report to find the numbers to calculate the overall WWR for your entire bldg. There is a summary page at the end of the lv-d report. Look for the line called-'all walls'. You can use those numbers to calc WWR percentage.<br>
<br>Pashalu<u></u><u></u></p><div><div><p class="MsoNormal"><br>On Oct 19, 2011, at 11:39 AM, deepika khowal <<a href="mailto:deepika.khowal@gmail.com" target="_blank">deepika.khowal@gmail.com</a>> wrote:<br><br>> Hi all<br>
><br>> I have a question about calculating WWR.<br>> for example, if the south wall area is 700sf and total window area is 70sf then the WWR should be 10%.<br>> but if 50% of south wall is part of a garage and is unconditioned, then in calculating WWR , should I include only the wall area for conditioned space or it should include complete facade?<br>
> Thanks<br>><br>> Deepika<br>><br>><br>><br>><u></u><u></u></p></div></div><p class="MsoNormal">> <image.png><br>> _______________________________________________<br>> Equest-users mailing list<br>
> <a href="http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org" target="_blank">http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org</a><br>> To unsubscribe from this mailing list send a blank message to <a href="mailto:EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG" target="_blank">EQUEST-USERS-UNSUBSCRIBE@ONEBUILDING.ORG</a><u></u><u></u></p>
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