Radiant floor temp differences

hot_rod

of 127& 105=232 divided by 2= 116.

One rule of thumb is, if the two temperatures are within 10 degrees of the average... go for it. i think you are close enough.

Tube spacing can do a bit to bring the supply temperatures closer. wider slab spacing would require warmer temperatures, for example.

hr

Wayco Wayne_2

I'm designing a system that needs

127 degree water in most of the house, but only 105 in the basement slab. Should I break the areas into 2 different water temps zones, or just use the warmer water in the slab. My angle on this is I want to use a Wilo Eco with zone valves for the whole house and be done with it. Where do you guys draw the line. Are there any guidelines you use in such instances? WW

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Unknown

Personally,,,,,,

I'd just go with the warmer water in the basement.

Brad White_201

Normally

if my design water temperatures differ by ten degrees (sometimes even less if precision matters), I use a separate temperature.

I do not know what your upper floor composition is, but I assume it is either a Climate-Panel type application under wood and as you say, basement slab, the 105 sounds well thought-out.

I would definitely go with a separate manifold and circulator for the basement slab and run that cooler. The higher mass at the higher temperature will swing wildly, reigned in only by frustrated controls.