DIY compressor air dryer,
built using a 1991 Ford F250 A/C condenser, copper lines, high pressure/high temp hoses, compression fittings and air moisture filter from Harbor Freight.
It works great !!! :D

It lowered the temperature going in to the air tank by over 200 degrees.

I placed a filter before the air goes back into the tank so that there would be less moisture going into the main tank.

When I recorded this I had not connected the fan to power because I was waiting for the "power converter" to convert current from 230 to 12volts.

The temperature difference was all just by the air being cooled in the A/C condenser.

Let me know if you have any questions and I would try to answer the best I can.

Ps. credit to chevahaulic for coming up w/ the original design,
I just modify it to suit my needs :)