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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'>As a follow up I wanted to thank everyone
who replied.<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'>GFX and PowerPipe both offer a range of
heat recovery units that can tie in directly to single showers or to drain
risers of varying sizes. The web sites can be found with a search.
I understand there may be some industry dispute going on in this product area
about distribution and technology to be aware of. <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'>No one had a source of data on drain line
temperatures, particularly for mixed flow, that is not just showers. I
would still like this, since at times, separating out showers on separate
stacks costs extra, and if the mixed drain temperatures are significantly above
the domestic water supply temperatures, reasonable heat recovery may be
possible there. <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'>For my project, we are going to have
dedicated shower drain stacks, which are combined on multiple floors, to 6 stacks,
at 3” diameter and heat recovery units are available for this. I am
still determining how this will work out in connecting to our two central
domestic water heater locations, and the paybacks. <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'>Thanks,<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'>Brian Thornton<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>
<div>
<p class=MsoAutoSig><st1:City w:st="on"><st1:place w:st="on"><font size=2
color=navy face=Arial><span style='font-size:11.0pt;font-family:Arial;
color:navy'>Thornton</span></font></st1:place></st1:City><font size=2
color=navy face=Arial><span style='font-size:11.0pt;font-family:Arial;
color:navy'> Energy Consulting<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face=Arial><span style='font-size:
11.0pt;font-family:Arial;color:navy'>p. 503-231-6600 f. 503-231-3555<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face=Arial><span style='font-size:
11.0pt;font-family:Arial;color:navy'>thorntonenergy@comcast.net<o:p></o:p></span></font></p>
</div>
<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>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<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@gard.com [mailto:bldg-sim@gard.com] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Brian Thornton<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, September 23, 2005
6:02 AM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@gard.com<br>
<b><span style='font-weight:bold'>Subject:</span></b> [bldg-sim] Heat recovery:
Any data on central water/sewer drain line temperatures from multi-family
buildings?</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=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am looking for information on the temperatures of the
waste water leaving multi-family buildings.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>We have looked at drain heat recovery at individual showers
and units, and found the space requirements (and placement of heat recovery equipment
in some other tenant/owner spaces) to be too big an obstacle.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am wondering if there is enough heat to consider central
heat recovery off of the combined drain lines to pre-heat domestic hot water
make-up.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Any one have history in trying such a heat recovery
approach?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Brian<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><st1:place w:st="on"><st1:City w:st="on"><font size=2
face=Arial><span style='font-size:11.0pt;font-family:Arial'>Thornton</span></font></st1:City></st1:place><font
size=2 face=Arial><span style='font-size:11.0pt;font-family:Arial'> Energy
Consulting<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 face=Arial><span style='font-size:11.0pt;
font-family:Arial'>p. 503-231-6600 f. 503-231-3555<o:p></o:p></span></font></p>
<p class=MsoAutoSig><st1:PersonName w:st="on"><font size=2 face=Arial><span
style='font-size:11.0pt;font-family:Arial'>thorntonenergy@comcast.net</span></font></st1:PersonName><font
size=2 face=Arial><span style='font-size:11.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>==================<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>You received this e-mail because you are subscribed <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>to the BLDG-SIM@GARD.COM mailing list. To unsubscribe <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>from this mailing list send a blank message to <o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'>BLDG-SIM-UNSUBSCRIBE@GARD.COM<o:p></o:p></span></font></pre></div>
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