Coaxial Heat Exchangers are structured by twisted heat exchanger tube to provide more heat transfer area for a given length of tubing and create. It have the flowing advantages Up to 350% enhancement in BTU/hr heat transfer Increased internal burst pressure and compression strength Plain tube ends for simply connection Lower cost compared to other specialized tubing Heat exchanger tube materials: Copper, cupronickel and titanium Applications: fresh water condensers & evaporators, salt water condensers & evaporators, sea water condensers & evaporators, pool water condensers & evaporators. Over shapes: round, rectangle, ellipse and customized shapes