For sale is a USED evaporator coil from a 4 ton A/C. Does not leak. For those inventive types, can be used for cooling various gases, for example as a compressor intercooler, to wring out moisture from freshly compressed air. Such an intercooler, combined with a drain, could dramatically reduce amount of water in compressor, compressor rust and would provide much drier air to your air tools, plasma torches, etc.