[RE-wrenches] External device for a Grundfos circulating pump

[jay]

HI Drake,

Flow rate isn’t all that important for hydronic.  
Most all systems just use a single pump and multiple zones.  

I’d go with a multi speed from taco or grundfos or there are a few others if you are going AC.  You’ll save yourself close to 500 $over the 26-99F

such as the grundfos UPS15-58 1/25 hp  3 speed should do it.

jay

> On Jun 18, 2025, at 2:47 PM, Drake Chamberlin via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> I am considering using a Grundfos Alpha1 26-99F, ECM circulating pump for our off grid hydronic heating system. The pump is regulated by a 0 to 10 Volt external device measuring temperature and pressure.
>  
> What specifically is that device, and where does it go in the system?
>  
> Thank you,
>  
> Drake 
>  
> Drake Chamberlin
> 
> Athens Electric LLC
> 
> Ohio Electrical Contractor’s License 44810
> 
> NABCEP Certified PV Installation Professional
> 
> 
> --
>  
> _______________________________________________
> List sponsored by Redwood Alliance
> 
> Pay optional member dues here: http://re-wrenches.org
> 
> List Address: RE-wrenches at lists.re-wrenches.org
> 
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> 
> There are two list archives for searching. When one doesn't work, try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> 
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
> 
> Check out or update participant bios:
> http://www.members.re-wrenches.org
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250618/c3a012a0/attachment.htm>