Pex pipe-boiler: aerial distance

[phloaw]

I am adding radiators to my 2-pipe central heating. The whole piping is copper 22mm and microbore, and I'm extending it with 15mm pex barrier pipe graded for CH.
I know that the first bit of pipes connected to the boiler must be copper, which is the case.
However, I couldn't find whether there is a minimum distance between the boiler and plastic pipes merely passing near to it, without being directly connected to it.
Is there such a thing?

Any other comment on what I'm trying to do is welcome

 

[ShaunCorbs]

1m minimum but more is better 3m I always say

 

[phloaw]

1m minimum but more is better 3m I always say

Are you talking about pipe distance or aerial distance (sorry, not sure if proper terminology)?
In the latter case, do you have a reference about that?
Thank you!

 

[ShaunCorbs]

Are you talking about pipe distance or aerial distance (sorry, not sure if proper terminology)?
In the latter case, do you have a reference about that?
Thank you!

pipe distance but each manufacturer should have a install guide to tell you there specs