When it comes to commercial AC vs Refrigeration, most of the units shown on the internet are commercially available AC units. The standard for the industry is .012 thick copper tubes and most of the systems are not available with a coil coating so you will see coil failures fairly quickly. The LRC designs are based on a thicker copper .016 thick wall and all our wine coils are dipped in an epoxy and cured in the oven. This is done because the wine vapors condense on the coil and get in the interface between the fin collars and the copper tube. The epoxy seals this area so the coils won’t get attacked by the acetic acid.