DuraCooler design features help increase heat transfer by more than 17%.

Duramax DuraCooler Patented Streamlined Header Design
Our streamlined header greatly enhance interior coolant and exterior seawater flow patterns while reducing system pressure drop within the keel cooler unit. We compared the heat transfer of the traditional square header design to the increased efficiency of the Duracooler streamlined header.



PATENTS PENDING
Latest engineered enhancement to DuraCooler design.



Streamlined header improves coolant flow distribution by 35% and heat rejection by 45% in outer tubes.
Coolant flow distribution to the outside tubes increased 35%

Heat rejection in the outer tubes increased 45%


DuraCooler is custom-engineered to fit your exact needs.



DuraCooler design reduces installation and maintenance costs.
Smaller footprint reduces costsDuraCooler Streamlined design with increased coolant flow to the outside tubes, can reduce the footprint of some units by as much as 42%. DuraCooler units can be easily retrofitted to cool auxiliary engines and other heat sources at a lower cost.
One piece, high-strength 90/10 cupronickel construction
DuraCooler one piece construction is compact, making it easy to install. It’s built for long life and low maintenance, with high-strength 90/10 cupronickel tubing that has excellent anti-fouling and heat transfer properties. It also resists water-flow erosion.
Custom Engineered to fit your exact needs
Your DuraCooler is custom-sized and manufactured to meet your engine specifications, installation space, internal plumbing configurations and operational requirements.

In 1997, Duramax Marine initiated a research and development program to identify opportunities to improve the operational efficiency of the square-headed outboard keel cooler.

Computer modeling showed poor coolant flow through tubes 1 & 8. It indicated the outside tubes were being used least efficiently even though these tubes had the greatest potential heat rejection per linear foot. Inefficiencies were attributed to the geometric square head design. Duramax Marine began to develop a more efficient streamlined header design.
It needed to enhance interior and exterior flow patterns and, at the same time, reduce the overall pressure drop within the keel cooler unit. Resulting in a more efficient unit with a smaller footprint. The DuraCooler streamline header design was tested.
The tests conducted on the streamlined header design showed an increase of coolant flow of 35% in the outside tubes, along with an increase of heat transfer in the outside tubes by 45%.
