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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I’m still not convinced of the accuracy of CO2 sensors at
the concentrations that are “meaningful” to IAQ. For example, a
sensor I looked at last year gave a 0 to 10V signal in the CO2 range 350 to 2500ppm.
Ashrae 62.1 states (from memory) that a concentration of 700ppm is analogous to
a mechanical ventilation rate of 7.5 l/s/person. That only gives you a couple
of those 10 volts to modulate the signal over.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Anyway Leen, you could try ASHRAE 62.1. It has a few tables and
Appendices in the back for various locations (not just US). It is commercial,
but if you look you may find a domestic/ housing equivalent.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Madhav
Munshi<br>
<b>Sent:</b> 29 March 2010 14:59<br>
<b>To:</b> leen peeters; bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Bldg-sim] CO2 in houses<o:p></o:p></span></p>
</div>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hi Leen, <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You could look at the 40% House report published by the
Environmental Change Institute, University of Oxford. <o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="http://www.eci.ox.ac.uk/research/energy/40house.php">http://www.eci.ox.ac.uk/research/energy/40house.php</a><o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>--<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Madhav Munshi<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Atelier Ten<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <b>On Behalf Of </b>leen
peeters<br>
<b>Sent:</b> Monday, March 29, 2010 4:55 AM<br>
<b>To:</b> bldg-sim@lists.onebuilding.org<br>
<b>Subject:</b> [Bldg-sim] CO2 in houses<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US>Dear all,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US>a while ago we had a conversation on
CO2-levels in hospitals. In Belgium, the Flemish government is currently
measuring the indoor CO2 and VOC-levels in many <strong>houses</strong>
throughout the Flemish part of the country. The levels they have currently set
as target are extremely low. Therefore, I want to know what the target values
for CO2, and possibly also for VOC, are for <strong>houses</strong>
in other countries.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US>Thanks already!<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US>Leen Peeters,<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US>Belgium <o:p></o:p></span></p>
</div>
<p class=MsoNormal><span lang=EN-US><br>
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