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<p class=MsoNormal><span class=SpellE><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Vinay</span></font></span><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'><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'>If I understand you correctly, you want to
know what the temperature difference is allowed to be between the actual space
temperature and the setpoint temperature to define what an “unmet hour”
is. In eQUEST, for example, this parameter is called the “throttling
range”, with a default value of 2°F for a proportional-type thermostat. Prior
posts have suggested increasing the throttling range as a method of reducing
unmet hours. I think this should be done as a last resort, but if you do it,
you need to keep the same throttling range for both baseline and proposed for
Appendix G. Unless the HVAC design is poor, the building has unusual load
characteristics, or you are trying to model something outside of the capabilities
of the simulation program, high unmet hours are often the result of “problems”
in the model – mistakes in simulating the zones, systems, loads etc.<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'>Bill<o:p></o:p></span></font></p>
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font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'>, BEMP, LEED<sup>®</sup>
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Engineers & Architects LLP</span></font></b><b><font size=2 color=black
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<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
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face=Arial><span style='font-size:9.0pt;font-family:Arial;color:navy;
mso-no-proof:yes'>134 South Fitzhugh Street</span></font></st1:Street><font
size=1 color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><st1:City w:st="on"><font size=1 color=navy face=Arial><span
style='font-size:9.0pt;font-family:Arial;color:navy;mso-no-proof:yes'>Rochester</span></font></st1:City><font
size=1 color=navy face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:navy;mso-no-proof:yes'>, <st1:State w:st="on">NY</st1:State> <st1:PostalCode
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color=navy><span style='font-size:9.0pt;color:navy;mso-no-proof:yes'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>T: (585) 325-6004 </span></font><font
size=1 color=black face=Arial><span style='font-size:9.0pt;font-family:Arial;
color:black;mso-no-proof:yes'>Ext. 114</span></font><font size=1 color=navy><span
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</span></font><font size=1 color=navy face=Arial><span style='font-size:9.0pt;
font-family:Arial;color:navy;mso-no-proof:yes'>F: (585) 325-6005</span></font><font
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12.0pt;font-family:Arial;color:black;mso-no-proof:yes'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;font-family:Arial;color:black;mso-no-proof:yes'>wbishop@pathfinder-ea.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 color=black face=Arial><span style='font-size:
9.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:black;mso-no-proof:
yes'>www.pathfinder-ea.com</span></font><font color=navy><span
style='color:navy;mso-no-proof:yes'><o:p></o:p></span></font></p>
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color:green;mso-no-proof:yes'>P</span></font><font color=green><span
style='color:green;mso-no-proof:yes'> </span></font><font size=1 color=green><span
style='font-size:7.5pt;color:green;mso-no-proof:yes'>Sustainability –
less is more.</span></font><font color=green><span style='color:green'><o:p></o:p></span></font></p>
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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'>
bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Vinay Devanathan<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, July 16, 2010 2:23
PM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Setpoint
Temperature</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hello All,<br>
<br>
Appendix G guideline says 300 hours of setpoints not met is acceptable. Is
there any Tolerance for heating/cooling setpoints not met? Or the temperatures
have to be exact?<br>
<br>
Thank you.<br>
<br>
Regards,<br>
Vinay<o:p></o:p></span></font></p>
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