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The WK400’s Hand welded steel construction.

The one piece, hand welded design of the Benjamin WK400 ADD-ON furnace is constructed of 11 gauge, 1/8″ thick steel. Benjamin’s safeguards the WK400’s consistently high degree of product quality, because each weld is individually inspected by the welder after it is created. Because Benjamin uses thicker steel than many other manufacturers, they have been able to extend their product line’s life span beyond that of which is expected.

Thanks to it’s revolutionary design, the Benjamin WK400 is classified as an “ADD-ON” appliance. This enables it to be connected to an existing oil or gas furnace.

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