[Solved] Comparing Single-Layer PEX and Multi-Layer Alupex for Underfloor Heating

Hello colleagues.
I am asking for simple advice.

From what I'm talking about, the most common pipe for water underfloor heating is the alupex multilayer pipe.
I know that single layer pex pipes are sometimes used, which are easily laid by passing hot water through the pipe during laying.
I wonder two things:
- due to the diffusivity of oxygen from the heat factor (water) is it not safer (durable) to use the alupex multilayer pipe?
- do single-layer pex pipes sometimes have better thermal transmittance and thus do not give more heat to the floor because they have a thinner wall?
Of course, single-layer pex is cheaper than multi-layer alupex, but for me, mainly due to the small amount of square meters to cover, the cost is not so important.

What pipe do you recommend and why?

Hello,

1. Permeability is at a very similar level, often has the same value - so we skip this point
2. When used for co, the pipe should always have an anti-diffusion layer - inform the manufacturer about it
3. A multilayer pipe, e.g. PE-Xc / AL / PE, where the aluminum jacket and the external PE protective coating have definitely greater resistance to:
mechanical damage
buckling resistance,
temperature
pressure
and almost 10 times smaller linear elongation ....

The disadvantage is the higher purchase price, but it is just a permanently connected element with the building structure. So let's buy a branded product, invite an authorized installer to do a pressure test, have at least 20 years warranty and not do premature repairs.

I also gave the multilayer pipe for the sanitaire, I do not like to return to the same topic twice.

Hello, multilayer pipes are more durable.

Cool,
thank you for your comments colleagues Kotłów and mint 654.

I also think that multilayer alupex are better and more durable, and so several people rightly convinced me.
I wasn't just sure about heat permeability.

Now, of course - I choose alupex

If anyone is interested, I need a good installer - a robot to make Poznań / the surrounding area - not a lot but 42m2, 4 loops, two rooms, so about 400mb of pipe for positioning and connecting to a concealed distributor with a pump-mixing group. The cabinet and manifold will already be installed. Styrofoam is ready, just put the foil and lay the pipe on the clips. Please write at PW.

400m pipe for 42m?

misiek1111 wrote:

400m pipe for 42m?

It will come out a little less but on average I count 10mb / 1m?, spacing on average every 10 cm.
I am more focused on spacing every 10 cm and the length will come out the same.
I care about oversizing and heating the lowest possible temperature.
The manifold with a mixing-pump group has a mixer range from 20-43 ° C, so it will not be a problem.

If any of your colleagues have any comments or suggestions, I will gladly listen to them.

Spout will come out less ...

I chose the AluPex multilayer pipe