Compressors / Condensers
Air cooled compressors are the least expensive and easiest to install, however they may not work as well in warm tropical waters where the air temperatures may be too saturated to absorb enough of the refrigerant's heat to cool your box completely.
Keel and Water cooled systems work very well in both tropical conditions and the cooler areas of North America and Europe.
Air Cooled
Keel Cooled
Water Cooled