Thanks guys for all the sagely feedback ! A few points I perhaps didn't make clear, 1.our floor plan does not allow for much options in the rooms we were thinking of elimination PEX under the bed so moving/changing furniture wasn't an option. 2. My main concern was if I plumbed only 50% with PEX{Radiant} in the moderate California climate (DAN We're in Southern Ca. Min. Lows mid 40'sF and at about 400 Ft above sea level, floor plan { will forward}I'll try to reach you later for est.) will only radiant plumbing 50% of slab sufficiently warm ambient room temp?
GEOTHERMAL{?}:
I understand that one may pump cold well water or water from a geo slinky coils into a slab if you are in a low humidity zone, anyone tried this??
John