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Go to your building shell and navigate to the space/roof/skylight in the component tree. Select the skylight then go to the spreadsheet tab on the right and find 'Skylight Surface - Curb - Performance'.<BR> <BR>Jeremy<BR> <BR>
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Date: Tue, 4 Jan 2011 20:00:19 -0500<BR>From: bruce5@bellnet.ca<BR>To: akrickx@seriousmaterials.com<BR>CC: equest-users@lists.onebuilding.org<BR>Subject: Re: [Equest-users] Window "Curb"<BR><BR>
<META name=Generator content="Microsoft SafeHTML"><FONT size=+1> A curb is used to lift the window up off the roof and allow the window to be flashed and made water tight. It can be as simple as a 2x6 or 2x8 wood box. A complicated one would be a fully insulated wall tunnel through a roof truss system. It should be modelled as an exterior wall. There should be no edge of glass effect as all the glass should be inside the opening. There will be an edge/corner effect where the window frame sits on the curb.<BR>Bruce Easterbrook P.Eng.<BR>Abode Engineering<BR><BR></FONT><BR>On 04/01/2011 04:12 PM, Alex Krickx wrote:
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<P class=ecxMsoNormal>Hi everyone,</P>
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<P class=ecxMsoNormal>Happy New Year! Well, to start off the new year, I have a question on what the “curb” is in the LV-H report. The placement of the information, and the fact that it has an area and U-value (much the way the window frame does) leads me to believe it may be to account for Edge-of-Glass effects (if you look at Window5 outputs it has COG U-values, frame U-values and edge-of-glass U-values).</P>
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<P class=ecxMsoNormal>I can’t see anywhere in the detailed edit mode to input curb information - I looked in both the “Glass Type Properties” and “Window Properties” Screens.</P>
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<P class=ecxMsoNormal>I found the following info in the DOE2 help file, but it looks like it only applies to skylights? It also wasn’t clear if it was in fact for edge of glass, and how to add this information (I’m guessing in the INP file?). Thanks for any help.</P>
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<P class=ecxMsoNormal><B><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 10pt">CURB</SPAN></B><B><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 10pt"> -CONDUCT<A name=_Toc140138080 target=_blank></A></SPAN></B></P>
<P class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt">Conductance of the skylight <SPAN>curb</SPAN>, excluding the outside air film but including the inside air film. </SPAN></P>
<P class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt">Notes:</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">1. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">You can define <SPAN>curbs</SPAN> only for exterior windows and skylights, not for interior windows.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">2. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">If the <SPAN>CURB</SPAN>-HEIGHT is zero no <SPAN>curb</SPAN> calculations will be performed.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">3. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">The <SPAN>curb</SPAN> area is <B>not</B> subtracted from the associated exterior wall area.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">4. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">Each hour, the program adds the effect of a wind speed-dependent outside air film to the user specified <SPAN>CURB</SPAN>-CONDUCT.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">5. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">The various elements of a <SPAN>curb</SPAN> (top, bottom, side, dividers, etc.) may have different conductances. In this case, <SPAN>CURB</SPAN>-CONDUCT should be an area-weighted average of the different elements.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">6. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">The program finds the overall window conduction by adding <SPAN>curb</SPAN>, frame, edge-of-glass, and center-of-glass contributions. Thus, all three of these contributions are included in each of the following report quantities:<BR> "Window Conduction" in summary reports LS-B, LS-C, LS-E, and LS-F;<BR> "Window U-Value" and "Window Area" in verification report LV-D and LV-H;<BR> WINDOW hourly report variable #1, "Window U-Value".</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">7. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">A WINDOW multiplier also multiplies the <SPAN>curb</SPAN> area.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">8. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">Window fins and overhangs shade the <SPAN>curb</SPAN> as well as the glazing.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">9. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">Shading devices, like blinds and drapes, that you specify using the WINDOW keywords SHADING-SCHEDULE and CONDUCT-SCHEDULE, affect only the glazed part of the window. They do not affect the heat conduction through the <SPAN>curb</SPAN>.</SPAN></P>
<P style="MARGIN-LEFT: 0.25in" class=ecxMsoNormal><SPAN style="FONT-FAMILY: 'Tms
Rmn','serif'; FONT-SIZE: 12pt">10. </SPAN><SPAN style="FONT-FAMILY: 'Times New
Roman','serif'; FONT-SIZE: 12pt">If the window has a setback, the <SPAN>curb</SPAN> is also set back by the same amount.</SPAN><SPAN style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"></SPAN></P>
<P class=ecxMsoNormal> </P>
<P class=ecxMsoNormal>Kind regards,</P>
<P class=ecxMsoNormal>Alex Krickx</P>
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<P class=ecxMsoNormal><SPAN style="COLOR: rgb(38,47,19); FONT-SIZE: 12pt">Alex Krickx, LEED AP</SPAN></P>
<P class=ecxMsoNormal><SPAN style="COLOR: gray; FONT-SIZE: 9pt">Building Energy Specialist</SPAN></P>
<P class=ecxMsoNormal><SPAN style="COLOR: rgb(31,73,125); FONT-SIZE: 8pt"><IMG id=ecxPicture_x0020_1 alt=email_sig src="" width=121 height=42></SPAN></P>
<P class=ecxMsoNormal><SPAN style="FONT-SIZE: 9pt">1250 Elko Dr, Sunnyvale, CA 94089</SPAN></P>
<P class=ecxMsoNormal><SPAN style="FONT-SIZE: 9pt">(t) 408.541.8124</SPAN></P>
<P class=ecxMsoNormal><SPAN style="COLOR: gray; FONT-SIZE: 9pt"> </SPAN></P>
<P class=ecxMsoNormal><B><I><SPAN style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 7.5pt">Warning:</SPAN></I></B><I><SPAN style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 7.5pt"> The information contained in this e-mail may be privileged attorney-client communications or attorney work product and/or proprietary and confidential. If the reader of this message is not the intended recipient then you have received it in error and any review, distribution or copying of this message is prohibited and you are to notify us immediately by reply e-mail and delete the original message immediately.</SPAN></I></P>
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