Same rugged steel construction used by all the major air conditioner manufacturers. Fully louvered steel jacket protects the evaporation coil from storm debris, hail and harsh weather. Not to mention the winning goal in a back yard soccer match. A plastic cabinet is no match for the all steel cabinet. The spiral titanium tube heat exchanger provides a corrosion-free waterway that can withstand the abuses of harsh pool chemistry. The spiral tube helps reduce deposit build-up and increases efficiency by performing a “scoop-and-lift” action.