I have used this approach with 1/2 inch nom. copper tube, it works.  The 
Aluminum I got form New Jersey Aluminum, they sold out to another company.  I 
am not sure it is made any more, but I had a custom extrusion made for me for 
about $3000  I have also seen a thin folded AL fin from floor heat people.  
Study your floor heating manuals well for sizing.   

--- On Thu, 7/22/10, Mick Abraham <m...@abrahamsolar.com> wrote:

From: Mick Abraham <m...@abrahamsolar.com>
Subject: [RE-wrenches] aluminum heat fins for radiant retrofit...who's got 'em?
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Date: Thursday, July 22, 2010, 8:56 AM

Hello, Wrenches~
Please see the photo on page 48 of the latest Home Power magazine (#138). This 
shows aluminum fins with an extruded clip into which Rehau type radiant floor 
tubing can be clipped. 


Where can I get these parts for resale?
Have any of you observed an installation where this approach actually worked 
OK? I'm sure the aluminum  fin would extract heat from the tubing OK but the 
wood subfloor won't extract heat from the aluminum very quickly. Insulation 
between the aluminum fin and the air below it might help, right?


My client wants to retrofit solar heat to an existing home which does not have 
the in-floor radiant tubing embedded in lightweight concrete--the more common 
way to do a radiant floor. He had planned to drive existing baseboard radiators 
but the higher temperature which those require (compared to a radiant floor) 
led to this pursuit.


Thanks in advance,
Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675



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