John Hall wrote:
OK, I understand the cooling, but still wonder if this is overkill. Why
don't any of the shops I have been in need to do this? My compressor does
collect water, which I drain periodically from the tank. I use it for
painting and driving nailers. When I use it, it's working steady. I never
sensed there was a problem. Is cooling of the air that big a deal?

Some geographical locations have air that contains much more moisture
than others. Also, some guys have applications that are much more
moisture-sensitive than others. If you want to spray paint, for example,
you need *dry* air.

If you blow air do you see a mist of water? If you direct the stream against
a piece of metal plate, do you see water "piling up"? If so, then you
have a lot of water in your air.

GWE