fresh home build coming soon

Holes in the webs, some are drilled @2" but now I am getting some 1 3/8" bushings.
Viega part:





I'll still need bigger holes for returns and runs out to the loop locations.
for those locations I can arrange a few mouse ears like this around the periphery of the hole for multiple runs.





Here is a screencap of the BC Calc analysis of the joists on the far side of the beam from that perspective. I have drilled the 2" holes on the far end but not the near end.


The first floor will have ~11 loops going to a couple of remote manifolds.
When I started out I planned on home runs with 1/2" PEX.
After much research and consultation with radiant heat guys, now I am using 3/8".
The 1/2" you can get out to about 300' max and 250' practical loop length.
The 3/8" is really best at 200' or less.
Home runs to the equipment room burn up so much of the working length that remote manifolds make more sense.

JTsyo said:

Do they make electric floor heaters instead of water if you're gong full solar?

Click to expand...

They do, but I have not seen large scale installations that way. I have heat wire under our current home's bathroom tiles, for example.
It would be far less efficient though. Heat pumps are money savers.
Typical Coefficient of Performance (COP) is above 3.
That means 3x the heat you would get from direct resistance heating.
My inverter ground source heat pump can get up to a COP of 5 if I can manage my ground loop temperatures.

First loop is up!

Taking a break now, Daisy is helping.