R.W. Fernstrum & Company is a trusted market leader in engineering and manufacturing custom cooling solutions for the marine industry. The GRIDCOOLER® Keel Cooler has been successfully applied to cool all types of vessels in the commercial, government, and recreational markets worldwide. Learn more about GRIDCOOLER Keel Coolers.

Commercial, Government, and Recreational Applications*
  • ATB
  • Barges
  • Commercial Fishing Vessels
  • Dredges
  • Escort/Specialty Tugs
  • Inland River Boats
  • Landing Craft
  • Life Boats
  • OSV
  • Passenger Vessels & Ferries
  • Patrol Boats
  • Pilot Boats
  • PSV
  • Push Boats
  • Recreational Boats
  • Repowers
  • Semi-Submersible (AUV & ROV)
Stationary & Industrial Applications*
  • Buoys
  • Drainage Systems
  • Facilities’ Climate Control
  • Hydroelectric Plants
  • Irrigation Systems
  • Lift Stations
  • Offshore Wind Generators
  • Pump Stations Engines
  • Storm Sewer Systems
  • Wave & Tidal Generators



WEKA Boxcooler

R.W. Fernstrum & Company has partnered with WEKA Boxcooler B.V. to manufacture and sell copper nickel boxcoolers to the North and South American Markets. The WEKA Boxcooler® has been successfully utilized for vessels operating in icy, sandy, or debris laden water. Learn more about WEKA Boxcoolers.

Commercial Applications*
  • Barges
  • Cargo Ships
  • Carriers
  • Commercial Fishing Vessels
  • Dredgers
  • Ferries
  • Ice Breakers
  • OSV
  • PSV
  • Tankers
  • Tugs
*The application lists provided are only partial lists. If you have an application outside of these parameters, our sales and engineering team may be able to help provide a solution. Please call 906.863.5553 or email