I am doing some pre-planning for a house build this spring. I have an oppturnity to run radiant low temp [geo thermal] in a chair rail height [32 inches] around the outer perimiter of the house [first floor]. Outside to inside, 9-inch poured concrete wall, 2x4 stud wall sprayed with closed cell foam, some product like ecowarm radiant board to hold the tubing, then thinstone veneer rock attached for finish.  So my questions are......Does this sound like a good set-up? What are the rules having electrical outlets in the wall? and would it be better to run the tubing horizontal or vertical in that 32 inch span? Other thoughts?

Thanks Dave

horizontal. I prefer radiators to radiant wall though as it's unlikely someone will forget and put covering furniture in front of a radiator. plus there is no puncture risk. with wall, you still have that consideration.

but wall is cheap and invisible. that is nice.

I've wondered why heat transfer plate manufacturers often include water-temp/output nomographs for R0.25 and R.05, etc. Is that for radiant wall/ceiling apps? (Subfloor materials typically being well-over R0.5 even before finish floor R is added.)

I've never seen a 0.05, only a 0.5 which represents a full Tile installation, typically. 0.25 represents drywall, typically.

most charts like that, in the case of a joist system, already include the R-value of a standard subfloor in their numbers, you don't add it in again.

... th' pesky decimal point moved, I SWEAR! :-)

Thanks.