With the price of copper at high levels, & predicted to remain much higher than aluminium into the future, there seems to have been a fair amount of material substitution in interconnect pipes, in Asia.

One of the forms seems to have an inner aluminium pipe, with ?plastic? external sheath.

Has anyone worked with aluminium tubes in either evaporator, or condenser?

What are the pro's & con's of using aluminium in domestic & light commercial hvac applications?

How are these aluminium sub-systems being connected?