What diameter pex is it? From what I've read, if I use 3/4" i.d. I can space it about 16". That would work great since a 500 ft coil would do the entire area in one run.
I don't think it is a good idea. You will have large temperature gradient between the tubes (the middle will be much colder. Also 1/2" is easier to handle. It is also good to have some built in a redudndancy for the case one of the loops gets damaged. Beside that you will save, in scope of things, negligible amount of money. There is also a plastifier (additive) to the concrete to make it better contact the tubes without bubbles and gaps. Didn't hear about it in the USA but we always used it in Europe.
Last edited by Ladia; 03/13/0912:18 PM.
We live in a barn (aircraft hanger) converted to a house. 0.7 ac leaky pond.
