Hydronics - Which PEX brands for Thermofin-C plates

[tomluoma]

We are putting in our first underfloor hydronics system.
We want to use Radiant Engng Thermofin-C heat plates on 8 inch centers.

They recommend ViegaPEX Barrier (PEX-c) because they say PEX-c is gripped by the track better -- but it has a 9.5 min C/L bend radius. We find this troubling.

They have had noise problems with PEX-a from a company we don't know -- Mr Pex.

They don't sell Wirsbo hePEX (PEX-a) due to a Wirsbo selling a competing heat plate.

So the questions are --
Does anyone have experience with these plates and with whose PEX and type?

What about this bend radius issue?

Who is making good barrier PEX now?

Is there a overall recommendation?

[jadnashua]

The OD of pex is controlled, so fit into a slot should be the same whichever brand you use; it's the ID that can vary. Wirsbo was my choice. I would NOT exceed the manufacturer's bending radius - it's just asking for problems.