R.W. Fernstrum & Company has been engineering and manufacturing GRIDCOOLER® Keel Coolers for the marine industry since 1949. Fernstrum® has partnered with WEKA Boxcoolers® and Tranter® to expand product offerings. These products are used for cooling marine propulsion engines, generator sets, reduction gears, and auxiliary systems aboard vessels of all sizes.

Each solution is engineered to meet the requirements of your engine, vessel and operating conditions. With the addition of our ISO 9001:2015 certification this year, we continue to strive to bring you the highest quality service and solutions.


Fernstrum has continually evolved the GRIDCOOLER Keel Cooler to meet the specific performance expectations of our customers as well as the marine industry in general. The GRIDCOOLER Keel Cooler, available in 90/10 copper-nickel and 5000 series aluminum, is factory assembled and tested to ensure dependability.

WEKA Boxcoolers

The 90/10 copper-nickel WEKA Boxcooler is a compact, closed circuit cooling system that is mounted in a sea chest within the vessel’s hull, offering excellent protection from submerged obstacles.

Tranter Heat Exchangers

Tranter is a global manufacturer of heat exchanger products including Welded Plate and Plate & Frame Heat Exchangers. These products have been utilized in a variety of heating and cooling applications including jacket water heaters, lube oil coolers, fresh water heaters, cargo heaters, and deck warmers.

For more information visit us at booth 1308 or

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