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<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Daniel,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Your home auditor should become more familiar with
her own test equipment!!!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Hydrogen is well known to cause false positives for
CO when using a combustion analyzer. There are sensors which exhibit _low_ cross
sensitivity to hydrogen, but those are not the rule. I know of no CO sensor that
is completely immune to H2.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is not to discount other
combustion venting issues, backdrafting, running a car in an attached
garage (even with the garage door open), etc. as a cause for her "ill
feeling" symptoms.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Please remember when you install the battery
box power vent, an appropriate inlet vent, drawing preferably outside
air (sealed vent system) is also required or you may further (slightly)
exacerbate the CO issue by pulling your intake air out of (e.g.) the
natural draft tank water heater vent. FieldControls.com has an outstanding
website that educates, informs, as well as sells venting products and
solutions.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Best wishes,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bill Loesch<BR>Solar 1 - Saint Louis Solar<BR>314
631 1094</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=dyoung@dovetailsolar.com
href="mailto:dyoung@dovetailsolar.com">Daniel Young</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, June 29, 2010 8:50
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Battery Bank
Off-gassing CO?</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal>I was emailed recently by someone in my area saying that
she thinks here battery bank is going bad and poisoning her home…. My firm did
not install her off grid system. Her original installer will not
respond.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>She has an 6yr old battery bank w/ 6 Trojan L16H’s (48V).
The system has 1.2kw of shell solar modules with an MX60 CC and FX Inverter.
She noticed feeling ill when in the basement where the system electronics were
installed, so she got out a combustion gas analyzer, (she is a home energy
auditor), and recorded over 500 ppm CO in the battery bank storage closet, not
the battery box, but the closet that stores the outback system. That is over
double the concentration that the US Consumer Product Safety Commission
considers deathly toxic. She reports this has been going on for the last 1-2
months. There is one battery box in this closet, with a 3” PVC vent pipe going
up to the roof. There is no power vent.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Has anyone heard of a flooded lead acid battery bank
emitting CO? I did not think that a lead/sulfur based battery was capable of
this. Is it possible that her combustion gas analyzer is mis-interpreting some
other gas as CO?<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>We already plan to install a power vent at minimum, and to
closely inspect her ventilation system and improve it as needed. Just curious
if anyone else has seen this happen before.<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Thanks,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><IMG id=Picture_x0020_1 height=189 alt=Danny
src="cid:014201cb17a0$038fe800$6401a8c0@solarf1dxi592n"
width=178><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<P>
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