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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>This is good information, Anne. Thanks for responding.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best of luck with the review!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Christian<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></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;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Anne Juran [mailto:juran@summerconsultants.com] <br><b>Sent:</b> Friday, October 21, 2011 10:15 AM<br><b>To:</b> 'Christian Kaltreider'; 'bldg'<br><b>Subject:</b> RE: [Bldg-sim] LEED Building Area--Total Footprint or Sum of Rooms?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:black'>Std 90.1 defines the gross floor area to include exterior and interior walls. A LEED consultant I work with sent the following from the latest LEED 2009 addendum:<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>“Gross floor area (based on ASHRAE definition) is that sum of the floor areas of the spaces within the building, including basements, mezzanine and intermediate-floored tiers, and penthouses with headroom height of 7.5 ft (2.2 meters) or greater. Measurements must be taken from the exterior faces of exterior walls OR from the centerline of walls separating buildings, OR (for LEED CI certifying spaces) from the centerline of walls separating spaces. Excludes non-enclosed (or non-enclosable) roofed-over areas such as exterior covered walkways, porches, terraces or steps, roof overhand, and similar features. Excludes air shafts, pipe trenches, and chimneys. Excludes floor area dedicated to the parking and circulation of motor vehicles. (Note that while excluded features may not be part of the gross floor area, and therefore technically not a part of the LEED project building, they may still be required to be a part of the overall LEED project and subject to MPRs, prerequisites, and credits).”<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>Note that your lighting allowance is based on the gross floor area.<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>As for OA, Std 62 defines the zone area as net occupiable, so inside face to inside face and excludes permanent obstructions such as columns.<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>Regarding other credits, apparently there is a rule of thumb that the gross area in EAp2 should be within 7% of the reported gross area used for the PIFs.<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'>I just went through all this for a LEED project. It’s in design review right now, but this is what they asked for.<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></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;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:bldg-sim-bounces@lists.onebuilding.org">bldg-sim-bounces@lists.onebuilding.org</a> <a href="mailto:[mailto:bldg-sim-bounces@lists.onebuilding.org]">[mailto:bldg-sim-bounces@lists.onebuilding.org]</a> <b>On Behalf Of </b>Christian Kaltreider<br><b>Sent:</b> Wednesday, October 19, 2011 10:42 AM<br><b>To:</b> 'bldg'<br><b>Subject:</b> [Bldg-sim] LEED Building Area--Total Footprint or Sum of Rooms?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I expected to see more on this in the archives…<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Is there a consensus on the acceptable floor area to include in a LEED model? I’ll talk as though the building is one story for simplicity. It seems that floor area is supposed to be consistent across credits, which leads me toward making the sum of the rooms in the model equal the total foot print, including all interior and exterior walls, as well as mechanical chases. However, it seems like a lot of modelers like to just use the interior floor area of each room, which will obviously total to less than the total footprint area. <o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For correct modeling, I can see it both ways. For instance, all of the area of the exterior surfaces should be accounted for (entire footprint), but ventilation (in cfm/sf) should just be accounting for usable floor area (sum of interior room areas). How do others approach this, and what experience have you had with LEED reviewers? <o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Christian<o:p></o:p></span></p></div></body></html>