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

  • Recreational Boats
  • Repowers
  • Semi-Submersible (AUV & ROV)
  • Pilot Boats
  • PSV
  • Push Boats
  • OSV
  • Passenger Vessels & Ferries
  • Patrol Boats


Stationary and Industrial Applications

  • Buoys
  • Drainage Systems
  • Facilities’ Climate Control
  • Heat Pump
  • Hydroelectric Plants
  • Industrial Process Cooling
  • Irrigation Systems

  • Lift Stations
  • Offshore Wind Generators
  • Onshore HVAC
  • Pump Stations Engines
  • Storm Sewer Systems
  • Underwater Data Center
  • Wave & Tidal Generators


R.W. Fernstrum & Company has partnered with WEKA Marine 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
  • Dredges
  • Cargo Ships
  • Carriers
  • Ferries
  • Ice Breakers

  • Commercial Fishing Vessels
  • OSV
  • PSV
  • Tankers
  • Tugs