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<p>I always try to talk the client into hydronic heating with ECM
drive circulation pumps. They do make ECM drive blower motors
that can be retrofitted in some furnace systems. Overall, its
just a bad combination off grid: the worse the weather is the less
PV production you have, and this corresponds to the same time that
the furnace is operating 12 hours/ night. They are either running
the generator a bunch, or waking up in the morning to a cold house
with the power off, and dead batteries. If its an AC coupled
system, they won't even have any PV production the next morning
either. This is another reason AC coupled is not a great idea, or
at least you need to always have some DC coupled PV as well, but I
digress......<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 8/23/18 5:43 PM, Dana wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black">Drake,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black">All the conventional
units I have amp clamped over the years are pushing 900-900+
watts per hour. I do not recommend them ever & to date I
have never found a lower wattage blower. I would assume that
a permanent magnet motor would fit this suggestion, but I
have not found one.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black">For off grid I
recommend: Radiant floor heat first and hot water base board
second long before hot air. Air is a better insulator than a
heat transfer agent.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black">The new ECM
(electronically commutated motors) pump motors are basically
at DC permanent magnet motor power draws [Taco &
Grundfoss] these days.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black">Best of luck with this
one.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
Gothic",sans-serif;color:black"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-family:"Century
Gothic",sans-serif;color:#002060">----------------------------------------------------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Century
Gothic",sans-serif;color:black">Dana
Orzel Great Solar Works, Inc.</span><span
style="font-size:9.0pt;font-family:"Century
Gothic",sans-serif;color:black"> </span><span
style="font-size:10.0pt;font-family:"Century
Gothic",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Century
Gothic",sans-serif;color:black">C -
208.721.7003 <a class="moz-txt-link-abbreviated" href="mailto:dana@solarwork.com">dana@solarwork.com</a><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Century
Gothic",sans-serif;color:black">Idaho Contractor - #
028765 Idaho PV # 028374<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:9.0pt;font-family:"Century
Gothic",sans-serif;color:black">NABCEP #
051112-136 <a
href="http://www.solarwork.biz" moz-do-not-send="true"><span
style="color:blue">www.solarwork.biz</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><u><span
style="font-size:9.0pt;font-family:"Century
Gothic",sans-serif;color:black">"Responsible
Technologies for Responsible People since 1988" </span></u><u><span
style="font-size:9.0pt;font-family:"Century
Gothic",sans-serif;color:black"><o:p></o:p></span></u></p>
<p class="MsoNormal" style="background:white"><b><span
style="font-size:18.0pt;font-family:Webdings;color:green">P</span></b><span
style="font-family:"Helvetica",sans-serif;color:navy"> </span><span
style="font-size:10.0pt;font-family:"Arial",sans-serif;color:green">Please
consider the environment before printing this email.</span><span
style="font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century
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<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="margin-left:.5in"><b>From:</b>
RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches-bounces@lists.re-wrenches.org"><re-wrenches-bounces@lists.re-wrenches.org></a> <b>On
Behalf Of </b>Drake<br>
<b>Sent:</b> Thursday, August 23, 2018 2:37 PM<br>
<b>To:</b> RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a><br>
<b>Subject:</b> [RE-wrenches] Forced air Furnace<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal" style="margin-left:.5in"><o:p> </o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal" style="margin-left:.5in">Hello Wrenches,<br>
<br>
What is the best choice for a propane, forced air furnace
for an off grid house? We would prefer one that doesn't have
a phantom load, although the transformer for the thermostat
may not be avoidable. Low blower current would be
preferable. The furnace AC will be powered by a Magnum 4448
PAE.<br>
<br>
Thank you,<br>
<br>
Drake <br>
<br>
Drake Chamberlin<br>
<i>Athens Electric LLC<br>
OH License 44810<br>
CO License 3773<br>
NABCEP Certified Solar PV <br>
740-448-7328<br>
</i><a href="http://athens-electric.com/"
moz-do-not-send="true">http://athens-electric.com/</a> <o:p></o:p></p>
</blockquote>
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