Ignoramus19820 wrote:

I was highly impressed with use of evaporator coils for drying
compressed air.

I called a few HVAC contrators from yellow pages, and, unfortunately,
none of them could give me anything. I would like to hear some
creative ideas on where to get them.

There's a huge (240 cfm) Arrow air dryer on my local craigslist (Bothell, WA) --
the seller wants $400 and would probably take $250.

GWE