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    <p>The use of F2 factors for foundation heat flows has always been
      flawed.   The simplest explanation for the F2 factor is that it's
      the effective U-value per perimeter length.   This formulation
      assumes that there are no heat loses through the foundation away
      from the perimeter, which is simply not true (think of the case in
      Minnesota where the constant deep ground temperatures is between
      55 and 60 F).  The other problem is  the delta-T used to derive
      the F2 factor is not clearly defined.  All the studies I've seen
      (albeit  all these are from 30 years  ago or more) derived  them
      against the outdoor air temperature, or more exactly, Tin -
      Tair.   This then opens up the question whether in DOE-2 the slab 
      should be modeled as an exterior wall or an underground wall?  
      The third problem  is that by treating the slab as a monolithic
      surface, it lumps the heat flow characteristics along the
      perimeter with those of the slab core , which differ in both
      magnitude and time  lag.  <br>
    </p>
    <p>When I last had a project on ground heat flows 17  years ago,  I
      proposed a simplified method where the foundation was divided into
      three regions  (perimeter  1' ,  near perimeter 1-4', and core
      >4' deep),  each with 3 conductances  to the daily average air
      temperature , average air temperature over the past three weeks, 
      and the deep ground temperature.  This method was implemented in
      an enhanced version of DOE-2.1E, and from what I hear, adopted 
      into California Title-24.   If anyone is interested  to read the
      report, just send me an e-mail.<a moz-do-not-send="true"
        href="#yiv9572653599Picture_x0020_4"><br>
      </a></p>
    <p>The good news for everyone here is that there is now a RTAR/WS 
      (ASHRAE terminology for a RFP) being circulated  in TC 4.7 (Energy
      Calculations)  that aims to develop a better simplified ground
      model to replace the F2 factors. Stay tuned but be forewarned that
      it takes ASHRAE at least a year to approve  a project and another
      half year to pick a contractor, so don't expect any products for
      another 3 years.</p>
    <p>Joe<br>
    </p>
    <pre class="moz-signature" cols="90">Moraga CA 94556
<a class="moz-txt-link-abbreviated" href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a>
<a class="moz-txt-link-freetext" href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
</pre>
    <div class="moz-cite-prefix">On 2/2/2018 12:26 PM, Paul Diglio via
      Equest-users wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:1867368567.2239059.1517603193184@mail.yahoo.com">
      <div style="color:#000; background-color:#fff;
        font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande,
        sans-serif;font-size:16px">
        <div id="yui_3_16_0_ym19_1_1517591308519_42721" dir="ltr">Thanks
          Bill, you are always such a big help.  That is what I thought,
          but just wanted to run it by the forum.<br>
        </div>
        <div id="yui_3_16_0_ym19_1_1517591308519_42720"><br>
        </div>
        <div id="yui_3_16_0_ym19_1_1517591308519_42723">Thanks to you
          too Nathan.<br>
        </div>
        <div id="yui_3_16_0_ym19_1_1517591308519_42719"><span></span></div>
        <div id="yui_3_16_0_ym19_1_1517591308519_42618"> </div>
        <div class="signature"
          id="yui_3_16_0_ym19_1_1517591308519_42619">Paul Diglio<br>
          <br>
        </div>
        <div class="qtdSeparateBR"
          id="yui_3_16_0_ym19_1_1517591308519_42620"><br>
          <br>
        </div>
        <div class="yahoo_quoted"
          id="yui_3_16_0_ym19_1_1517591308519_42626" style="display:
          block;">
          <div style="font-family: Helvetica Neue, Helvetica, Arial,
            Lucida Grande, sans-serif; font-size: 16px;"
            id="yui_3_16_0_ym19_1_1517591308519_42625">
            <div style="font-family: HelveticaNeue, Helvetica Neue,
              Helvetica, Arial, Lucida Grande, sans-serif; font-size:
              16px;" id="yui_3_16_0_ym19_1_1517591308519_42624">
              <div dir="ltr" id="yui_3_16_0_ym19_1_1517591308519_42623">
                <font id="yui_3_16_0_ym19_1_1517591308519_42622"
                  size="2" face="Arial">
                  <hr id="yui_3_16_0_ym19_1_1517591308519_42621"
                    size="1"> <b><span style="font-weight:bold;">From:</span></b>
                  "Bishop, Bill" <a class="moz-txt-link-rfc2396E" href="mailto:bbishop@pathfinder-ea.com"><bbishop@pathfinder-ea.com></a><br>
                  <b><span style="font-weight: bold;">To:</span></b>
                  Nathan Miller <a class="moz-txt-link-rfc2396E" href="mailto:nathanm@rushingco.com"><nathanm@rushingco.com></a>; Paul
                  Diglio <a class="moz-txt-link-rfc2396E" href="mailto:paul.diglio@sbcglobal.net"><paul.diglio@sbcglobal.net></a>;
                  <a class="moz-txt-link-rfc2396E" href="mailto:equest-users@onebuilding.org">"equest-users@onebuilding.org"</a>
                  <a class="moz-txt-link-rfc2396E" href="mailto:equest-users@onebuilding.org"><equest-users@onebuilding.org></a> <br>
                  <b><span style="font-weight: bold;">Sent:</span></b>
                  Friday, February 2, 2018 3:13 PM<br>
                  <b><span style="font-weight: bold;">Subject:</span></b>
                  RE: [Equest-users] Slab on Grade Floor Heat Loss<br>
                </font> </div>
              <div class="y_msg_container"
                id="yui_3_16_0_ym19_1_1517591308519_42658"><br>
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                  <div id="yui_3_16_0_ym19_1_1517591308519_42657">
                    <div class="yiv9572653599WordSection1"
                      id="yui_3_16_0_ym19_1_1517591308519_42656">
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42700"><span
                          style="color:#1F497D;">Paul,</span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42655"><span
                          style="color:#1F497D;"
                          id="yui_3_16_0_ym19_1_1517591308519_42654">Your
                          reviewer may have thought that if the slab was
                          showing up as an “exterior surface” (such as
                          on the LV-D report) than the model was
                          simulating heat transfer between the zones and
                          the outside air through the slab. But
                          eQUEST/DOE-2 simulates heat transfer across
                          underground surfaces differently, as described
                          in the UNDERGROUND-WALL and UNDERGROUND-FLOOR
                          section of the DOE-2 help documentation. The
                          main difference is that ground temperature is
                          used instead of the OA temperature as the
                          outside temperature. The monthly ground
                          temperature is taken from the weather file, or
                          can be entered as SITE-PARAMETERS:GROUND-T.</span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42765"><span
                          style="color:#1F497D;">  </span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42660"><span
                          style="color:#1F497D;"
                          id="yui_3_16_0_ym19_1_1517591308519_42661">The
                          eQUEST wizard creates custom constructions for
                          each underground surface based on inputs for
                          Exterior/Cavity Insulation and Perimeter Floor
                          Insulation. Underground floors are given
                          constructions with low U-factor (high R-value)
                          consistent with the lower heat transfer that
                          would be expected.</span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42766"><span
                          style="color:#1F497D;">  </span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42699"><span
                          style="color:#1F497D;">Regards,</span></div>
                      <div class="yiv9572653599MsoNormal"><span
                          style="color:#1F497D;">~Bill</span></div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42662"><span
                          style="color:#1F497D;">  </span></div>
                      <div id="yui_3_16_0_ym19_1_1517591308519_42669">
                        <div class="yiv9572653599MsoNormal"
                          id="yui_3_16_0_ym19_1_1517591308519_42697"><b><span
                              style="font-size:10.0pt;">William Bishop,
                              PE, BEMP, BEAP, CEM, LEED AP
                            </span></b><b><span
                              style="font-size:10.0pt;">|</span></b><b
                            id="yui_3_16_0_ym19_1_1517591308519_42696"><span
                              style="font-size:10.0pt;"
                              id="yui_3_16_0_ym19_1_1517591308519_42695">
                              Pathfinder Engineers & Architects LLP</span></b></div>
                        <table class="yiv9572653599MsoNormalTable
                          yahoo-compose-table-card"
                          style="width:394.8pt;border-collapse:collapse;"
                          id="yui_3_16_0_ym19_1_1517591308519_42668"
                          cellspacing="0" cellpadding="0" width="0"
                          border="0">
                          <tbody
                            id="yui_3_16_0_ym19_1_1517591308519_42667">
                            <tr style="min-height:13.45pt;"
                              id="yui_3_16_0_ym19_1_1517591308519_42666">
                              <td colspan="1" rowspan="1"
                                style="width:258.45pt;padding:0in 5.4pt
                                0in 5.4pt;min-height:13.45pt;"
                                width="345">
                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><b><span
                                      style="font-size:9.0pt;line-height:105%;">Senior
                                      Energy Engineer</span></b></div>
                              </td>
                              <td colspan="1" rowspan="6"
                                style="width:136.35pt;padding:0in 5.4pt
                                0in 5.4pt;min-height:13.45pt;"
                                id="yui_3_16_0_ym19_1_1517591308519_42665"
                                width="182">
                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><span
                                    style="font-size:9.0pt;line-height:105%;"><img
                                      id="yiv9572653599Picture_x0020_4"
src="cid:image007.jpg@01D39C38.6333FF10"
                                      data-id="79b3c67b-1db0-7bd8-de35-494e31cdc030"
                                      moz-do-not-send="true" height="38"
                                      width="56"> 
                                    <img
                                      id="yiv9572653599Picture_x0020_2"
src="cid:image008.jpg@01D39C38.6333FF10"
                                      data-id="1180430f-7203-9ba8-74de-25756784247f"
                                      moz-do-not-send="true" height="39"
                                      width="46"></span></div>
                              </td>
                            </tr>
                            <tr style="min-height:4.55pt;">
                              <td colspan="1" rowspan="1"
                                style="width:258.45pt;padding:0in 5.4pt
                                0in 5.4pt;min-height:4.55pt;"
                                valign="top" width="345">
                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><span
                                    style="font-size:5.0pt;line-height:105%;">
                                     </span></div>
                              </td>
                            </tr>
                            <tr style="min-height:9.8pt;">
                              <td colspan="1" rowspan="1"
                                style="width:258.45pt;padding:0in 5.4pt
                                0in 5.4pt;min-height:9.8pt;"
                                nowrap="nowrap" valign="bottom"
                                width="345">
                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><span
                                    style="font-size:9.0pt;line-height:105%;">134
                                    South Fitzhugh Street</span><span
                                    style="font-size:9.0pt;line-height:105%;color:#1F497D;">                
                                  </span><span
                                    style="font-size:9.0pt;line-height:105%;">Rochester,
                                    NY 14608</span></div>
                              </td>
                            </tr>
                            <tr style="min-height:12.4pt;">
                              <td colspan="1" rowspan="1"
                                style="width:258.45pt;padding:0in 5.4pt
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                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><b><i><span
style="font-size:9.0pt;line-height:105%;">T: (585) 698-1956</span></i></b><b><i><span
                                        style="color:#002060;">             
                                      </span></i></b><span
                                    style="color:#1F497D;">          </span><span
style="font-size:9.0pt;line-height:105%;">F: (585) 325-6005</span><span
style="font-size:9.0pt;line-height:105%;"></span></div>
                              </td>
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                                <div class="yiv9572653599MsoNormal"
                                  style="line-height:105%;"><span
                                    style="color:#1F497D;"><a
                                      rel="nofollow" shape="rect"
                                      ymailto="mailto:wbishop@pathfinder-ea.com"
                                      target="_blank"
                                      href="mailto:wbishop@pathfinder-ea.com"
                                      moz-do-not-send="true"><span
                                        style="font-size:9.0pt;line-height:105%;">bbishop@pathfinder-ea.com</span></a></span><span
style="font-size:9.0pt;line-height:105%;">            
                                  </span><span style="color:#1F497D;"><a
                                      rel="nofollow" shape="rect"
                                      target="_blank"
                                      href="http://www.pathfinder-ea.com/"
                                      moz-do-not-send="true"><span
                                        style="font-size:9.0pt;line-height:105%;">www.pathfinder-ea.com</span></a></span></div>
                              </td>
                            </tr>
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                              <td colspan="1" rowspan="1"
                                style="width:258.45pt;padding:0in 5.4pt
                                0in 5.4pt;min-height:24.6pt;"
                                valign="top" width="345">
                                <div class="yiv9572653599MsoNormal"
                                  style="margin-top:3.0pt;line-height:105%;"><span
                                    style="color:#1F497D;"><img
                                      id="yiv9572653599Picture_x0020_5"
src="cid:image009.png@01D39C38.6333FF10"
                                      alt="http://png-5.findicons.com/files/icons/977/rrze/720/globe.png"
data-id="d62fa64e-1360-99cf-e256-a74e282fcbcc" moz-do-not-send="true"
                                      height="32" width="34" border="0"></span><span
style="font-size:7.5pt;line-height:105%;color:#00B0F0;">Carbon Fee and
                                    Dividend - simple, effective, and
                                    market-based.</span><span
                                    style="color:#1F497D;"></span></div>
                              </td>
                            </tr>
                          </tbody>
                        </table>
                      </div>
                      <div class="yiv9572653599MsoNormal"
                        id="yui_3_16_0_ym19_1_1517591308519_42694"><span
                          style="color:#1F497D;">  </span></div>
                      <div class="yiv9572653599yqt0055857711"
                        id="yiv9572653599yqt28255">
                        <div id="yui_3_16_0_ym19_1_1517591308519_42684">
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in;"
                            id="yui_3_16_0_ym19_1_1517591308519_42683">
                            <div class="yiv9572653599MsoNormal"
                              id="yui_3_16_0_ym19_1_1517591308519_42682"><b>From:</b>
                              Equest-users
                              [<a class="moz-txt-link-freetext" href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
                              <b>On Behalf Of </b>Nathan Miller via
                              Equest-users<br clear="none">
                              <b>Sent:</b> Friday, February 02, 2018
                              2:35 PM<br clear="none">
                              <b>To:</b> Nathan Miller
                              <a class="moz-txt-link-rfc2396E" href="mailto:nathanm@rushingco.com"><nathanm@rushingco.com></a>; Paul Diglio
                              <a class="moz-txt-link-rfc2396E" href="mailto:paul.diglio@sbcglobal.net"><paul.diglio@sbcglobal.net></a>;
                              <a class="moz-txt-link-abbreviated" href="mailto:equest-users@onebuilding.org">equest-users@onebuilding.org</a><br
                                clear="none">
                              <b>Subject:</b> Re: [Equest-users] Slab on
                              Grade Floor Heat Loss</div>
                          </div>
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">Fixed my
                          typo in the F-factor heat loss calc (should
                          have read 50 ft of perimeter)… See below.
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div id="yui_3_16_0_ym19_1_1517591308519_42693">
                          <div class="yiv9572653599MsoNormal"
                            style="margin-right:0in;margin-bottom:4.0pt;margin-left:0in;">
                            <b><span style="font-size:9.0pt;">Nathan
                                Miller, PE, LEED AP BD+C</span></b><b><span
                                style="font-size:9.0pt;"> –
                              </span></b><i><span
                                style="font-size:8.0pt;">Mechanical
                                Engineer/Senior Energy Analyst</span></i><b><span
                                style="font-size:9.0pt;"></span></b></div>
                          <div class="yiv9572653599MsoNormal"
                            style="margin-top:3.0pt;line-height:115%;"><b><span
style="font-size:8.0pt;line-height:115%;">RUSHING</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">|</span><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><b><span
                                style="font-size:8.0pt;line-height:115%;">O</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">206-285-7100
                              |</span><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><b><span
                                style="font-size:8.0pt;line-height:115%;">C</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">207-650-3942</span><span
                              style="font-size:8.0pt;line-height:115%;"></span></div>
                          <div class="yiv9572653599MsoNormal"
                            style="line-height:115%;"
                            id="yui_3_16_0_ym19_1_1517591308519_42692"><b><span
style="font-size:8.0pt;line-height:115%;"><a rel="nofollow" shape="rect"
                                  target="_blank"
                                  href="http://www.rushingco.com/"
                                  moz-do-not-send="true"><span
                                    style="color:#6F1200;">www.rushingco.com</span></a></span></b><b><span
style="font-size:9.0pt;line-height:115%;"></span></b></div>
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div id="yui_3_16_0_ym19_1_1517591308519_42689">
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in;"
                            id="yui_3_16_0_ym19_1_1517591308519_42688">
                            <div class="yiv9572653599MsoNormal"
                              id="yui_3_16_0_ym19_1_1517591308519_42687"><b>From:</b>
                              Equest-users [<a rel="nofollow"
                                shape="rect"
                                ymailto="mailto:equest-users-bounces@lists.onebuilding.org"
                                target="_blank"
                                href="mailto:equest-users-bounces@lists.onebuilding.org"
id="yui_3_16_0_ym19_1_1517591308519_42686" moz-do-not-send="true">mailto:equest-users-bounces@lists.onebuilding.org</a>]
                              <b>On Behalf Of </b>Nathan Miller via
                              Equest-users<br clear="none">
                              <b>Sent:</b> Friday, February 2, 2018 2:33
                              PM<br clear="none">
                              <b>To:</b> Paul Diglio <<a
                                rel="nofollow" shape="rect"
                                ymailto="mailto:paul.diglio@sbcglobal.net"
                                target="_blank"
                                href="mailto:paul.diglio@sbcglobal.net"
                                moz-do-not-send="true">paul.diglio@sbcglobal.net</a>>;
                              <a rel="nofollow" shape="rect"
                                ymailto="mailto:equest-users@onebuilding.org"
                                target="_blank"
                                href="mailto:equest-users@onebuilding.org"
                                moz-do-not-send="true">equest-users@onebuilding.org</a><br
                                clear="none">
                              <b>Subject:</b> Re: [Equest-users] Slab on
                              Grade Floor Heat Loss</div>
                          </div>
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">In the past
                          I’ve done a conversion of F-factor (perimeter
                          based) slab-on-grade heat loss to U-factor
                          (area) and input that in on a zone-by-zone
                          basis if I really wanted to nail down SOG heat
                          loss.
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">Example-
                          Space is 20’ x 30’, but the exposed perimeter
                          is only two of the faces (20’ + 30’). Lets say
                          it is uninsulated SOG.
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">F-factor
                          from 90.1: F = 0.73 Btu/(hr*ft*F)<br
                            clear="none">
                          <br clear="none">
                          Perimeter based heat loss: 0.73 Btu/(hr*ft*F)
                          * 50 ft = 36.5 BTU/(hr *F)</div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">Then we can
                          back-calculate the U-factor to assume for the
                          whole floor to equate to that heat loss: 36.5
                          BTU/(hr *F) = 600 SF * X BTU/(hr*SF*F) -> U
                          = 0.0608 BTU/(hr*SF*F)</div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div class="yiv9572653599MsoNormal">You can
                          create a custom floor construction for each
                          space to provide the U-factor to produce
                          equivalent heat loss that the F-factor calcs
                          are telling you lose. For purely core zones
                          (no exposed perimeter), I guess the F-factor
                          calcs are telling us were not really losing
                          heat through that slab (doesn’t’ seem right,
                          but it probably is relatively small)
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div>
                          <div class="yiv9572653599MsoNormal"
                            style="margin-right:0in;margin-bottom:4.0pt;margin-left:0in;">
                            <b><span style="font-size:9.0pt;">Nathan
                                Miller, PE, LEED AP BD+C</span></b><b><span
                                style="font-size:9.0pt;"> –
                              </span></b><i><span
                                style="font-size:8.0pt;">Mechanical
                                Engineer/Senior Energy Analyst</span></i><b><span
                                style="font-size:9.0pt;"></span></b></div>
                          <div class="yiv9572653599MsoNormal"
                            style="margin-top:3.0pt;line-height:115%;"><b><span
style="font-size:8.0pt;line-height:115%;">RUSHING</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">|</span><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><b><span
                                style="font-size:8.0pt;line-height:115%;">O</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">206-285-7100
                              |</span><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><b><span
                                style="font-size:8.0pt;line-height:115%;">C</span></b><span
                              style="font-size:8.0pt;line-height:115%;">
                            </span><span
                              style="font-size:8.0pt;line-height:115%;">207-650-3942</span><span
                              style="font-size:8.0pt;line-height:115%;"></span></div>
                          <div class="yiv9572653599MsoNormal"
                            style="line-height:115%;"><b><span
                                style="font-size:8.0pt;line-height:115%;"><a
                                  rel="nofollow" shape="rect"
                                  target="_blank"
href="https://url.emailprotection.link/?a6X-5ry0mOOudUi-eMfQ7K9LfplwNoMV9idJhgEyf85c%7E"
                                  moz-do-not-send="true"><span
                                    style="color:#6F1200;">www.rushingco.com</span></a></span></b><b><span
style="font-size:9.0pt;line-height:115%;"></span></b></div>
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div>
                          <div style="border:none;border-top:solid
                            #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in;">
                            <div class="yiv9572653599MsoNormal"><b>From:</b>
                              Equest-users [<a rel="nofollow"
                                shape="rect"
                                ymailto="mailto:equest-users-bounces@lists.onebuilding.org"
                                target="_blank"
                                href="mailto:equest-users-bounces@lists.onebuilding.org"
                                moz-do-not-send="true">mailto:equest-users-bounces@lists.onebuilding.org</a>]
                              <b>On Behalf Of </b>Paul Diglio via
                              Equest-users<br clear="none">
                              <b>Sent:</b> Friday, February 2, 2018 2:19
                              PM<br clear="none">
                              <b>To:</b> <a rel="nofollow" shape="rect"
ymailto="mailto:equest-users@onebuilding.org" target="_blank"
                                href="mailto:equest-users@onebuilding.org"
                                moz-do-not-send="true">equest-users@onebuilding.org</a><br
                                clear="none">
                              <b>Subject:</b> [Equest-users] Slab on
                              Grade Floor Heat Loss</div>
                          </div>
                        </div>
                        <div class="yiv9572653599MsoNormal">  </div>
                        <div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11245">
                            <div class="yiv9572653599MsoNormal"
                              style="background:white;"><span
                                style="font-size:12.0pt;">I recently
                                submitted a model to the local utility
                                company for an incentive.  Part of the
                                buildings' first floor is slab on grade.</span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11310">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">  </span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11309">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">One of the
                                comments I received back is that this
                                erroneously shows up as an exterior
                                surface and I should delete all the slab
                                on grade floors in the component tree. 
                                Doesn't seem right to me.</span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11372">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">  </span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11378">
                            <div class="yiv9572653599MsoNormal"
                              style="background:white;"><span
                                style="font-size:12.0pt;">I did a few
                                and it does reduce the overall energy
                                consumption.  In the 3D model, no floors
                                show, just open to the interior of the
                                zone.</span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11371">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">  </span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11373">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">So is eQuest
                                assuming that without this floor, there
                                is no heat loss out the bottom of the
                                zone?  Is this reasonable?</span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11387">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">  </span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11388">
                            <div class="yiv9572653599MsoNormal"
                              style="background:white;"><span
                                style="font-size:12.0pt;">Thank you,</span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11246">
                            <div class="yiv9572653599MsoNormal"
                              style="background:white;"><span
                                style="font-size:12.0pt;"> </span></div>
                          </div>
                          <div
                            id="yiv9572653599yui_3_16_0_ym19_1_1517591308519_11247">
                            <div class="yiv9572653599MsoNormal"
                              style="margin-bottom:12.0pt;background:white;"><span
                                style="font-size:12.0pt;">Paul Diglio</span></div>
                          </div>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
                <br>
                <br>
              </div>
            </div>
          </div>
        </div>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
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</pre>
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