[RE-wrenches] Forced air Furnace

[Darryl Thayer]

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.

On Thu, Aug 23, 2018 at 6:44 PM Dana <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.
>
>
>
> Best of luck with this one.
>
>
>
>
> ----------------------------------------------------------------------------
>
> Dana Orzel                              Great Solar Works, Inc.
>
> *C - 208.721.7003                       dana at solarwork.com
> <dana at solarwork.com>*
>
> Idaho Contractor - # 028765         Idaho PV # 028374
>
> NABCEP # 051112-136                       www.solarwork.biz
>
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>
> *From:* RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org> *On
> Behalf Of *Drake
> *Sent:* Thursday, August 23, 2018 2:37 PM
> *To:* RE-wrenches <re-wrenches at lists.re-wrenches.org>
> *Subject:* [RE-wrenches] Forced air Furnace
>
>
>
> 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 LLCOH License 44810CO License 3773NABCEP Certified Solar
> PV 740-448-7328*http://athens-electric.com/
>
>
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