Solar heat storage in ICF walls?
In house planning stage, high altitude 8.800', cold Colorado climate, great solar available. Has anyone tried running pex in ICF walls before pour & using concrete for solar heat storage?
Warming the ICF concrete with solar would reduce my gas bill somewhat.
In my planned ICF walls & footers, there will be about 260,000 btus / 1* f heat storage available.
Tying solar into my planned radiant floor system would be difficult with the high temperature cast iron boiler I have already bought.
I realize that right now, solar is hard to justify cost-wise with gas rates being low.
I would like to find a way to use solar cheaply.
I don't like panels on roof, looks ,large hail, possible leaks, etc.
Don't want passive windows, I've had them in past home, insulated curtains were PITA with the closing / opening, this needs to be automatic, again $$
I will have a South facing wall with about 235ft2 am thinking of building verticle panels onto wall.
I have used the DOE online RESCHECK to calculate my design heat load (32kbtu at -20*f). Had to SWAG some inputs like infiltration. R23 ICF walls are about 20% of load.
Plans do inculde HRV, good windows, SPF ceilings, FPSF, well insulated radiant floors, etc.