Bock Water Heaters Inc. developed and manufactures the patented Turboflue® Heat Exchanger, a highly advanced heat transfer technology used in many of the company's products. The cylindrically shaped Turboflue features hundreds of steel Turbofins welded in a helical pattern to the interior wall of the vertical flue tube. Turbofins increase metal mass within the heat exchanger to maximize heat conduction capacity and their helical placement induces turbulence in the hot combustion gasses traveling through the heat exchanger to maximize contact with metal surface area. By its unique design, a Turboflue heat exchanger captures heat that is vented out the chimney from a conventional flue heat exchanger, thereby reducing energy waste and fuel consumption while heating water faster.

The robotically built Turboflue heat exchanger is fabricated from heavy-wall steel in multiple configurations ranging from four-inches to sixteen-inches in diameter and containing from 600 to 1000 Turbofins. The performance capacity of Turboflue technology and its multiple configurations make possible the use of a single Turboflue in water heaters that normally require many - perhaps a dozen or more conventional flue heat exchangers. A water tank (within a water heating appliance) built with a single, robust Turboflue is structurally much stronger than a tank into which is welded numerous conventional flues, thereby providing a more durable and longer-lasting appliance.