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Bill,<br>
<br>
I wish I had first hand experience with these folks. What I can
comment on is that they were IMHO the premier technically competent
exhibitor pitching solar HVAC at the AHR show. Several exhibitors
shared that they had a $10K commitment to exhibit (for just the base
10 x 10 foot booth) and yet some folks didn't know heat transfer
basics.<br>
<br>
I can imagine that the inadequate installation of the mini-splits
resulting in unsatisfactory operation doesn't surprise you. The well
designed, well manufactured equipment is still dependent upon proper
installation to deliver the advertised capability. Even here in
Missouri, an EPA certification is theoretically required to purchase
refrigerant. Unfortunately, just like the solar industry,
certification is no guarantee of quality workmanship.<br>
<br>
There are similar groups to the RE-wrenches in many other technical
areas. The first that comes to mind in the HVAC arena is <br>
<br>
HeatingHelp.com <br>
<br>
Undoubtedly there has already been discussion of the mini-split
products as they have been actively promoted for well over three
years and have justifiably been very well received by consumers. The
mini-split promotes the concept of modular HVAC something our
non-oil subsidized neighbor nations have been onboard for some time
already.<br>
<br>
I cannot agree with you more about the tech support offered by the
HVAC <u>manufacturers</u>. What helps is to understand how their
supply chain, etc. is structured. In the example of International
Comfort Products (ICP) they manufacturer quite similar products for
no less than nine "quality brand name private label products"
(oftentimes distinguished only by the label and perhaps a paint
stripe). The distributor is the front line tech support. When the
distributor cannot solve the problem, a three way conference call is
requested with the manufacturer, which is hopefully returned the
same day. Not exactly timely support for the field tech. Makes the
solar tech support model look like perfection. I don't know that
other HVAC manufacturers (Nortec, Johnson Controls, Trane, Goodman,
et.al.) work the tech support any differently.<br>
<br>
Best, please keep us informed of your results,<br>
<br>
<pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094</pre>
<div class="moz-cite-prefix">On 3/10/2016 10:34 PM, William Dorsett
wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366">Thanks,
Bill. Do you have any fairly close connection to anyone who
has used HotSpot’s equipment, tech support etc? I’ve put in
perhaps a dozen Fujitsu minisplit’s as an alternative to
trying to find small efficient furnaces…and mostly in the
early installs mistakes were made by HVAC techs who didn’t
want to take the time to make sure there were no refrigerant
leaks under very high pressure. They’ve otherwise been very
good. Tech support…mixed bag.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366">The
heat recovery focus of HotSpot looks very promising.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366">Again
thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366">Bill
Dorsett<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366">Manhattan,
KS <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#993366"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
RE-wrenches
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On
Behalf Of </b>Bill Loesch<br>
<b>Sent:</b> Thursday, March 10, 2016 4:12 AM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] PV-direct air heating?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dan & Bill,<br>
If mini-split equipment is what you are using/considering you
might want to look further at <br>
<br>
<a moz-do-not-send="true" href="http://www.hotspotenergy.com">www.hotspotenergy.com</a><br>
<br>
John Williams who runs the place was at the AHR show in
Orlando earlier this year and has DC and solar HVAC equipment.<br>
Hope it helps,<br>
<br>
<o:p></o:p></p>
<pre>Bill Loesch<o:p></o:p></pre>
<pre>Solar 1 - Saint Louis Solar<o:p></o:p></pre>
<pre>314 631 1094<o:p></o:p></pre>
<div>
<p class="MsoNormal">On 3/9/2016 9:40 PM, William Dorsett
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dan,
I think it is Gree that has a PV direct mini-split heat
pump for both heating and air conditioning. It may have
run on two 250 watt modules. When in non-PV mode, I
believe the AC is rectified to DC and run through an
inverter. And there are now a few others as well….possibly
Fujitsu.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bill
Dorsett</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Manhattan,
KS</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
RE-wrenches [<a moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Dan Fink<br>
<b>Sent:</b> Wednesday, March 09, 2016 8:07 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] PV-direct air heating?</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">I have an interesting question I
haven't run into before, using existing equipment, some in
place, some just waiting for an install.<o:p></o:p></p>
<div>
<p class="MsoNormal">Has anyone here ever done an MPPT
PV-direct install to DC air heaters? <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Advanced Energy used to have a
PV-direct MPPT water heating controller, but the
residential division of their company no longer exists.
We are looking at 1200-1500 watts of PV.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">How would one program a Midnite
Classic (for example) to most efficiently connect PV to
DC heating elements without a battery bank/diversion
load setup, whether for water or air?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">This one's new to me; I've never
tried PV direct heating before.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Thanks in advance for any input.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">Dan
Fink</span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">Adjunct
Professor of Solar Energy
Technology, Ecotech
Institute</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">IREC
Certified Instructor™ for: </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">~ PV
Installation Professional</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">~
Small Wind Installer</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">Executive
Director, Buckville Energy</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:9.5pt">NABCEP
Registered Continuing
Education Providers™<br>
<a moz-do-not-send="true"
href="tel:970.672.4342"
target="_blank"><span
style="color:#1155CC">970.672.4342</span></a></span><o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
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