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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Michael,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You could create a custom efficiency curve
for the burner using manufacturer data - Engineered Air has an efficiency curve
for its 15:1 turndown burner, refer to the attached.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Alternatively in <st1:place w:st="on"><st1:country-region
w:st="on">Canada</st1:country-region></st1:place>, our EE4 software uses the
following curve fit data which could be used to create a custom curve for
modulating burners; I’m not sure where they got this from though.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>MODCURVE = CURVE-FIT TYPE = QUADRATIC<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>DATA = (1,1) (0.9,0.901) (0.8,0.802)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
(0.7,0.704) (0.6,0.605) (0.5,0.506)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
(0.4,0.407) (0.3,0.308) (0.2,0.209)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>
(0.1,0.11) ..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regards, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Aaron<o:p></o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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color=navy face=Calibri><span style='font-size:11.0pt;font-family:Calibri;
color:navy'>Aaron Smith, </span></font></b></strong><em><i><font color=gray
face=Calibri><span style='font-family:Calibri;color:gray'>P.Eng</span></font></i></em><em><i><font
color=navy face=Calibri><span style='font-family:Calibri;color:navy'> </span></font></i></em><font
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face=Verdana><span style='font-size:10.0pt;font-family:Verdana;color:gray;
font-style:italic'>M&R Engineering</span></font></i><i><font size=1
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Michael Campbell
[mailto:mike@sustainablesolutionscorporation.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, March 12, 2014
4:49 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Hall, Brendan;
equest-users@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Equest-users]
Modulating furnace</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Thanks for the reply. However, to
clarify, this is an AHU with gas furnace heat, so there is no boiler.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><b><font size=2 color="#17109c" face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:#17109C;font-weight:bold'>Mike
Campbell, E.I.T., LEED AP O+M</span></font></b><font color="#1f497d"
face=Arial><span style='font-family:Arial;color:#1F497D'><br>
</span></font><b><font color="#17109c" face=Arial><span style='font-family:
Arial;color:#17109C;font-weight:bold'>Sustainability Specialist</span></font></b><font
color="#1f497d" face=Arial><span style='font-family:Arial;color:#1F497D'><br>
</span></font><b><font color="#4f6228" face=Arial><span style='font-family:
Arial;color:#4F6228;font-weight:bold'>Sustainable Solutions Corporation</span></font></b><font
color="#1f497d"><span style='color:#1F497D'><br>
</span></font><font color="#000099"><span style='color:#000099'>Office:</span></font><font
color="#1f497d"><span style='color:#1F497D'> <a href="http://610-569-1047/"
target="_blank">610-569-1047</a></span></font><o:p></o:p></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color="#000099" face=Calibri><span style='font-size:11.0pt;color:#000099'>Mobile</span></font></st1:place></st1:City><font
color="#000099"><span style='color:#000099'>:</span></font><font color="#1f497d"><span
style='color:#1F497D'> <a href="http://610-569-1047/" target="_blank">609-923-1743</a><br>
<a href="http://www.sustainablesolutionscorporation.com/" target="_blank">www.SustainableSolutionsCorporation.com</a><br>
</span></font><i><font color="#000099"><span style='color:#000099;font-style:
italic'>Sustainable Solutions Corporation is WBENC and BCorp Certified.</span></font></i><font
color="#1f497d"><span style='color:#1F497D'><br>
<br>
</span></font><i><font size=1 color="#999999"><span style='font-size:7.5pt;
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Hall, Brendan
[mailto:<a href="mailto:BHall@karpinskieng.com">BHall@karpinskieng.com</a>] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, March 12, 2014 3:45
PM<br>
<b><span style='font-weight:bold'>To:</span></b> Michael Campbell; <a
href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [Equest-users]
Modulating furnace</span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'>Under the boiler, set the min ratio =
.06. </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Brendan Hall, PE, LEED AP</span></font><font
color=black face=Arial><span style='font-family:Arial;color:black'> </span></font><font
size=1 color=black face=Arial><span style='font-size:8.0pt;font-family:Arial;
color:black'>BD+C</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Engineer, Mechanical</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 color=red face=Arial><span style='font-size:
13.5pt;font-family:Arial;color:red'>karpinski<br>
</span></font><font size=1 color="#1f497d" face=Arial><span style='font-size:
7.5pt;font-family:Arial;color:#1F497D'>ENGINEERING</span></font><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'><br>
</span></font><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>3135 Euclid Avenue</span></font></st1:address></st1:Street><br>
<st1:place w:st="on"><st1:City w:st="on"><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'>Cleveland</span></font></st1:City><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:black'>, <st1:State w:st="on">OH</st1:State> <st1:PostalCode
w:st="on">44115</st1:PostalCode></span></font></st1:place><font size=2
color="#1f497d" face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:#1F497D'><br>
</span></font><font size=2 color=red face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:red'>P</span></font><font size=2 color="#1f497d"
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:#1F497D'>
<a href="tel:216.391.3700" target="_blank">216.391.3700</a> Ext 3111<br>
</span></font><font size=2 color=red face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:red'>E</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'> </span></font><u><font
size=2 color=blue face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:blue'><a href="mailto:bhall@karpinskieng.com" target="_blank"
title="mailto:myuhasz@karpinskieng.com">bhall@karpinskieng.com</a></span></font></u><font
size=2 color=blue face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:blue'><br>
</span></font><font size=2 color=red face=Arial><span style='font-size:10.0pt;
font-family:Arial;color:red'>W </span></font><u><font size=2 color=blue
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:blue'>www.<a
href="http://www.karpinskieng.com/" target="_blank"
title="http://www.karpinskieng.com/">karpinskieng.com</a></span></font></u><o:p></o:p></p>
</div>
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style='font-size:11.0pt;color:#1F497D'> </span></font><o:p></o:p></p>
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<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> <a
href="mailto:equest-users-bounces@lists.onebuilding.org">equest-users-bounces@lists.onebuilding.org</a>
[<a href="mailto:equest-users-bounces@lists.onebuilding.org">mailto:equest-users-bounces@lists.onebuilding.org</a>]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Michael Campbell<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, March 12, 2014
3:41 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <a
href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> [Equest-users] Modulating
furnace</span></font><o:p></o:p></p>
</div>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>What
is the appropriate way to model a gas furnace that modulates with a 16:1
turndown?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Thank
you,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><b><font size=2 color="#17109c" face=Arial><span
style='font-size:11.0pt;font-family:Arial;color:#17109C;font-weight:bold'>Mike
Campbell, E.I.T., LEED AP O+M</span></font></b><font face=Arial><span
style='font-family:Arial'><br>
<b><font color="#17109c"><span style='color:#17109C;font-weight:bold'>Sustainability
Specialist</span></font></b><br>
<b><font color="#4f6228"><span style='color:#4F6228;font-weight:bold'>Sustainable
Solutions Corporation</span></font></b></span></font><br>
<font color="#000099"><span style='color:#000099'>Office:</span></font> <a
href="http://610-569-1047/" target="_blank">610-569-1047</a><o:p></o:p></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color="#000099" face=Calibri><span style='font-size:11.0pt;color:#000099'>Mobile</span></font></st1:place></st1:City><font
color="#000099"><span style='color:#000099'>:</span></font> <a
href="http://610-569-1047/" target="_blank">609-923-1743</a><br>
<a href="http://www.sustainablesolutionscorporation.com/" target="_blank">www.SustainableSolutionsCorporation.com</a><br>
<i><font color="#000099"><span style='color:#000099;font-style:italic'>Sustainable
Solutions Corporation is WBENC and BCorp Certified.</span></font></i><br>
<br>
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