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Both the Isotemp Basic line and the Isotemp Slim lines of Stainless Steel Marine Water Heaters come with a brushed stainless steel cover as well as innovative internal design. They achieves the highest possible capacity via optimised installation of the engine water heat exchanger as well as the immersion heater. The Basic line has a larger diameter (16 inches) and shorter length.
The Basic 24, 40 and 75 are the only three models that have the double heat exchanger option. The double coil is sometimes used by boat owners who have Webasto water heating, to maximize use of the heating. They are often used in conjunction with two engines such as a main engine and a generator to take advantage of the surplus heat provided by two separate sources.
