[RE-wrenches] Forced air Furnace
Ray
ray at solarray.com
Sat Sep 8 04:52:26 EDT 2018
I started recommending people use the new ECM drive circ pumps. They use
half the power and are a direct replacement. Have your plumber check
out the Taco e series, or the Grundfos Alpha series of circ pumps.
Ray Walters
Remote Solar
303 505-8760
On 9/7/18 8:45 PM, David Palumbo wrote:
>
> El Sid 10W DC pumps are great but in my experience they did not have
> the flow and head “oomph” for long runs for the zones on our second
> and third floors with our hydronic heating system (wood boiler). In
> our off grid house we installed El Sid’s on all 4 zones in the late
> 1980’s. We had recurring problems with the 2^nd and 3^rd floor zones
> (long runs) becoming air bound repeatedly after a couple of months of
> heavy use in the winter. Basement and 1^st floor zones did not have
> this problem. I consulted with some plumbing and heating folks and
> ended up replacing the 2^nd and 3^rd floor zone El Sid’s with 115VAC
> Grundfos circ pumps. Problem solved, no more air lock problems. I had
> a hard time understanding that while the El Sid’s worked OK on the
> longer, higher head zones but did not have the power to avoid the air
> lock situation in our heating system. One of the plumbers explained it
> to me twenty something years ago BUT I don’t recall his explanation
> now. Maybe some wrench with more hydronic chops than I can explain it.
>
> Dave Palumbo
>
> Independent Power
>
> Hyde Park, VT
>
> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> *From: *Bradley Bassett <mailto:bbassett2 at gmail.com>
> *Sent: *Friday, September 7, 2018 10:09 PM
> *To: *RE-wrenches <mailto:re-wrenches at lists.re-wrenches.org>
> *Subject: *Re: [RE-wrenches] Forced air Furnace
>
> I have multiple ElSid pumps in my heating system which have been
> running for just about 15 years without the slightest hitch. At 10W
> each they are hard to beat, but they do need DC so a power supply is
> needed. I ran them off 24VDC direct from the battery for the first 10
> years and from a small MeanWell power supply for the last 5 years. My
> only complaint is that when there are 4 of them running it sounds like
> a miniature WWII bomber. No loud enough to hear outside of the utility
> room but something to keep in mind.
>
> Brad Bassett
>
> AEE Solar
>
> Brad
>
> On Fri, Sep 7, 2018 at 7:33 AM Drake
> <drake.chamberlin at redwoodalliance.org
> <mailto:drake.chamberlin at redwoodalliance.org>> wrote:
>
> Dana,
>
> Your comments, and other comments on this list have made me see
> the light. We are going to go with a boiler.
>
> What is the best source of equipment for this application these days?
>
> Many years ago, I helped install a system in Colorado using El Sid
> pumps, with guidance from you, if you recall this ancient history.
>
> Cheers,
>
> Drake
>
> Drake Chamberlin
> /Athens Electric LLC
> OH License 44810
> CO License 3773
> NABCEP Certified Solar PV
> 740-448-7328
> /http://athens-electric.com/
>
>
> At 07:43 PM 8/23/2018, you wrote:
>
> Content-Type: multipart/alternative;
> boundary="----=_NextPart_000_0068_01D43B08.DFB2A130"
> Content-Language: en-us
>
> 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 <mailto:dana at solarwork.com>
> *Idaho Contractor - # 028765 Idaho PV # 028374
> NABCEP # 051112-136 www.solarwork.biz <http://www.solarwork.biz>
> _"Responsible Technologies for Responsible People since 1988"
> _*P* Please consider the environment before printing this email.
>
>
> *From:* RE-wrenches <re-wrenches-bounces at lists.re-wrenches.org
> <mailto: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
> <mailto: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 LLC
>
> OH License 44810
>
> CO License 3773
>
> NABCEP Certified Solar PV
>
> 740-448-7328
>
> http://athens-electric.com/
>
>
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