Refrigerated air dryers are the best of all methods to get dry air. Downside is they take more power to run.
Compressed air often has 1/2 the input power to the motor in it and it is hot. IF you run a water cooled after cooler you can extract much of this heat and use it to heat shop incoming cold water or, or.
IF you really must have near absolute dry air then the refer unit would be able to do it at much smaller size and power consumption.
Dan Bentler
