<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt">I have installed about a dozen Laing D-5 pumps in the last year, and have had good luck with them. Our thermal supplier includes the Laing pumps in all of their kits now, and stopped selling the El Sids a couple years back, due to reliability issues. I too have seen many El Sids fail.<br><div> </div>Nick Soleil<br>Project Manager<br>Advanced Alternative Energy Solutions, LLC<br>PO Box 657<br>Petaluma, CA 94953<br>Cell: 707-321-2937<br>Office: 707-789-9537<br>Fax: 707-769-9037<div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Howie Michaelson <howie@suncatchervt.com><br><b><span
style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Mon, November 29, 2010 12:59:13 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] Laing Solar Eco Pumps vs. El Sid<br></font><br>
Hi All,<br><br>I'm looking for feedback on the Laing EcoCirc Pumps for use in closed<br>glycol PV driven SHW loops as well as closed loop off-grid hydronic<br>heating loops (24 vDC battery systems or 12 vDC stepped down). Probably<br>the D5 is the pump I'd use, but I'm open to any and all feedback.<br><br>In particular, I'm looking for comparisons to El Sids. The Laings appear<br>to have a stronger pump curve than the El Sids. I've used El Sids a fair<br>amount for these applications and have had less than stellar results, as<br>the El Sids often seem to have very short life spans. Dan F at El Sid<br>suggests that they blow up due to high voltages, although he claims the 24<br>volt battery based pumps are good to 31 vDC and I've had them break at<br>much lower voltages. I've also run the B12 pumps on a converter from BZ<br>Products which was voltage limited (to 15 volts) - supposedly a safe<br>voltage for the 12 volt battery
based El Sid pumps (although Dan inferred<br>at one point that voltage limited converters can have a higher voltage<br>spike at start-up. I haven't ordered any over the last couple of years so<br>I don't know if anything has changed, as I got tired of replacing them.<br><br>Anyone have experience with the Laings in these circumstances? Or any<br>similar or perhaps hopefully experience with the El Sids? At $2-300 a pop<br>for the El Sids, I'm feeling gun-shy about spec'ing them any more.<br><br>Thanks,<br>Howie<br>-- <br>Howie Michaelson<br>NABCEP Certified Solar PV Installer™<br><br>Sun Catcher, LLC<br>Renewable Energy Systems Sales and Service<br>VT Solar & Wind Incentive Program Partner<br><span><a target="_blank" href="http://www.SunCatcherVT.com">http://www.SunCatcherVT.com</a></span><br>(cell) 802-272-0004<br>(home) 802-439-6096<br><br><br><br><br><br>_______________________________________________<br>List sponsored by Home Power
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