PEX or Copper in a Masonry chimney?

[Dave T]

I am putting a EKO 60 in my basement I have no choice but to run a flued masonary
8x8 chimney on the outside of my house....I have some extra 1" ox barrier pex
line,or some small diameter copper line from a roll can I run pex or copper in my
chimney on the outside of the flue off the boiler to stop
the cold chimney issues??Or is this not feasible..

 

[Dave T]

I have to go up 40' and insulated chimney is about $2000
masonary is about $600

 

[Dave T]

I'll do some more homework and look into the prices of the insulation
Thanks for the tip DAVE