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<p>I agree with the difficulty of FHA for grid isolated applications. I have an EGauge system on my house and here is a screen print of a cold, windy period. Very high inrush current for the blower motor. An addition I am finishing is solar assisted radiant floor. Chris</p>
<p> <img src="cid:30845c207e69ebe03ff1ac5958b6d6b6@entech-engineering.com" width="707" height="398" /></p>
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<p>On 2018-08-23 20:17, Darryl Thayer wrote:</p>
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<div dir="ltr">I agree with Dana 100% almost. I have measured many a furnace with up to 1300 watts, 800 or 1000 watts is normal. But this furnace with larger ducts and a high temp rise (140 discharge) and ECM motor was an exceptionally low draw. This is from memory back in about 2010, I have since had a heart attack with a heavy penalty so my memory may be flawed. </div>
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<div dir="ltr">On Thu, Aug 23, 2018 at 6:44 PM Dana <<a href="mailto:dana@solarwork.com">dana@solarwork.com</a>> wrote:</div>
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<p class="MsoNormal"><span style="font-size: 14.0pt; font-family: 'Century Gothic',sans-serif; color: black;">Drake,<u></u><u></u></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.<u></u><u></u></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.<u></u><u></u></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.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size: 14.0pt; font-family: 'Century Gothic',sans-serif; color: black;">Best of luck with this one.<u></u><u></u></span></p>
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<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;"><u></u><u></u></span></p>
<p class="MsoNormal"><strong><span style="font-size: 10.0pt; font-family: 'Century Gothic',sans-serif; color: black;">C - 208.721.7003 <a href="mailto:dana@solarwork.com">dana@solarwork.com</a><u></u><u></u></span></strong></p>
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<p class="MsoNormal" style="margin-left: .5in;"><strong>From:</strong> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>> <strong>On Behalf Of </strong>Drake<br /><strong>Sent:</strong> Thursday, August 23, 2018 2:37 PM<br /><strong>To:</strong> RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br /><strong>Subject:</strong> [RE-wrenches] Forced air Furnace<u></u><u></u></p>
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<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 /><em>Athens Electric LLC<br />OH License 44810<br />CO License 3773<br />NABCEP Certified Solar PV <br />740-448-7328<br /></em><a href="http://athens-electric.com/" target="_blank" rel="noopener noreferrer">http://athens-electric.com/</a> <u></u><u></u></p>
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