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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Sorry for the long attachment here, but this LEED v2.2 EAc1 comment has me really confused so I want to post it in its entirety.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='font-size:9.0pt;font-family:"Verdana","sans-serif"'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span style='font-size:9.0pt;font-family:"Verdana","sans-serif"'>The EAc1 Narrative describes the interior lighting design target for all studio spaces is 20 fc and that task lights have been modeled identically in the Baseline and Proposed case. However, according to the IESNA Lighting Handbook, ninth edition, the minimum horizontal design illuminance for art studios is 50 fc and for reading areas with handwritten tasks is 30 fc. The ASHRAE allowances represent the power allowance required to meet the minimum IESNA illuminance requirements for various space types. It is inappropriate to claim savings for designs that do not meet the minimum lighting level requirements and model the additional lighting power in the Baseline for lighting in the Proposed that is required to perform the anticipated tasks.<br><br>Also, Table 1.4 reports that 4.02 kW of process lighting has been modeled in both cases, and it is assumed that this represents the task lighting. Process lighting is limited to the exempt interior lighting applications described in Section 9.2.2.3. Task lighting is regulated and thus not considered a process load. Section 9.6.3(b) does provide an additional allowance for task lighting when the Space by Space Method is used, but this may not be used for lighting required to raise the ambient lighting to meet the required lighting levels. If this additional allowance is used in the Proposed design, the Baseline must be modeled with the same power as the Proposed up to the 0.35 W/square foot allowance. Please remove all task lighting power from the Baseline model that is required to meet the IESNA recommended illuminance levels. If any of the additional allowance from Section 9.2.2.3 is applied to the Baseline case, provide calculations verifying that this additional lighting is not required in the Proposed case to meet the required illuminance levels and confirming that this only represents the portion of the additional allowance that is used in the Proposed case.<br><br></span><o:p></o:p></p><p class=MsoNormal>My first question; isn’t low ambient-task specific a commonly accepted energy use reduction strategy? Why would I model a lighting design in the proposed solution which isn’t installed and how would one determine, without an extensive lighting design effort, the appropriate lighting power to achieve 50fc, or 30fc? (not quite sure which one they want) <o:p></o:p></p><p class=MsoNormal>Second, the spaces in question are architecture college studios. If the task lighting is a plug in desk lamp, provided by the student, then am I correct in assuming it’s not regulated by 9.2.2.3? I’ve assumed 60W per lamp as plug load, but there no way that the lamp type or light distribution can be controlled as defined in 9.6.3.b, nor is it a given that a lamp will be used. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m at a loss as to how to respond to this. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks for any input.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>tb<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:10.0pt;color:gray'>Tom Butler<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;color:gray'>Residential Green Building Services Project Manager<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;color:gray'>Tel: 404-604-3635</span></b><span style='font-size:10.0pt'><o:p></o:p></span></p><p class=MsoNormal style='page-break-after:avoid'><b><span style='font-size:10.0pt;color:gray'>Fax: 404-872-5009</span></b><span style='font-size:10.0pt;color:gray'><br><b>Email: </b></span><span style='font-size:10.0pt'><a href="mailto:amcfarland@southface.org"><b><span style='color:blue'>tbutler@southface.org</span></b></a><o:p></o:p></span></p><p class=MsoNormal style='page-break-after:avoid'><b><span style='font-size:10.0pt;color:gray'>Web: </span></b><span style='font-size:10.0pt'><a href="http://www.southface.org/"><b><span style='color:blue'>www.southface.org</span></b></a><b><span style='color:gray'><o:p></o:p></span></b></span></p><p class=MsoNormal style='page-break-after:avoid'><span style='font-size:10.0pt;color:gray'>241 Pine Street NE, Atlanta, GA 30308<o:p></o:p></span></p><p class=MsoNormal style='page-break-after:avoid'><span style='color:gray'><o:p> </o:p></span></p><p class=MsoNormal style='page-break-after:avoid'><a href="http://www.greenprints.org/"><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext;text-decoration:none'><img 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