[RE-wrenches] Forced air Furnace

[Drake]

The Goodman furnace in our on grid house pulls 400 W.

At 08:17 PM 8/23/2018, you wrote:
>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. Â
>
>On Thu, Aug 23, 2018 at 6:44 PM Dana 
><<mailto:dana at solarwork.com>dana at solarwork.com> wrote:
>
>Drake,
>
>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.
>
>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.
>
>The new ECM (electronically commutated motors) 
>pump motors are basically at DC permanent magnet 
>motor power draws [Taco & Grundfoss] these days.
>
>Â
>
>Best of luck with this one.
>
>Â
>
>----------------------------------------------------------------------------
>
>Dana Orzel                   
>Â Â Â Â Â Â Â Â Â Â  Great Solar Works, Inc.
>
>C - 208.721.7003Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
>Â Â Â Â Â Â  <mailto:dana at solarwork.com>dana at solarwork.com
>
>Idaho Contractor - # 028765Â Â Â Â Â Â Â Â  Idaho PV # 028374
>
>NABCEP # 051112-136Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 
>Â Â Â Â Â Â Â  <http://www.solarwork.biz>www.solarwork.biz
>
>"Responsible Technologies for Responsible People since 1988"Â
>
>P Please consider the environment before printing this email.
>
>Â
>
>Â
>
>From: RE-wrenches 
><<mailto:re-wrenches-bounces at lists.re-wrenches.org>re-wrenches-bounces at lists.re-wrenches.org> 
>On Behalf Of Drake
>Sent: Thursday, August 23, 2018 2:37 PM
>To: RE-wrenches 
><<mailto:re-wrenches at lists.re-wrenches.org>re-wrenches at lists.re-wrenches.org>
>Subject: [RE-wrenches] Forced air Furnace
>
>Â
>
>Hello Wrenches,
>
>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.
>
>Thank you,
>
>Drake
>
>Drake Chamberlin
>Athens Electric LLC
>OH License 44810
>CO License 3773
>NABCEP Certified Solar PV
>740-448-7328
><http://athens-electric.com/>http://athens-electric.com/
>
>Â
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