I saw this quote in another post and I want to ask a question, but I did not want to hijack the other thread.

"Not true as far as Trane/AmStd aluminum coils. In fact that is the way the market is moving. Carrier and others had copper coils which were prone to leaks. They have moved toward tin plated and now aluminum."

I have always felt that copper coils probably have a significant advantage in cold, dark heat exchangers because microbial growth is severely inhibited by copper. I never really looked into hard evidence for that assumption. I just found the following paper very quickly. Evidence indicates that copper is a big advantage in that respect.

My question is, does the industry take this into consideration or are longevity and cost the only considerations?

Here is a link that might be useful: Microbial growth in heat exchangers