At the moment, I have two compressed air dryers.

One is the one I had for a few years, it is a 15 CFM dryer, whose
brand I do not recall. What I know is that if I open up a valve
downstream of, the air gushes through it in huge quantities.

The other is a bigger, 25 CFM rated dryer by Speedaire, which I
thought I would use to upgrade my existing one.

If I simply connect a 1/4" line to the Speedaire, and have nothing
blocking the other end, the air comes out of if, robustly, but the
flow is nothing like on the 15 CFM dryer. It probably is 25 CFM, at
least, but it feels as though the line is obstructed, at least I was
expecting a lot more flow.

This 25 CFM Speedaire has a feature (heat exchanger) that transfers
coldness from outgoing air into the incoming air.

So, my question is, is that normal behavior at all, do heat exchangers
add quite a bit to "obstruction", or is there possibly something with
this air dryer.

If you think that it is a problem, and you have seen it before, I
would love to know what might cause an obstruction like that, maybe a
bug that crawled in there.

--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/