Keel cooling. What is it and what are its advantages?

DuraCooler® Keel Cooler - Duramax Marine

Fernstrum GRIDCOOLER Keel Cooler units with enhanced tubing

How Keel Cooling Works - R.W.Fernstrum & Company

kool keel diesel engine, Page 3

Marine Exhaust and Keel Cooling Systems - Solé Diesel

Back to Basics: What is Keel Cooling?

Keel Cooling Tank Design for Narrowboats - Beta Marine

Marine Exhaust and Keel Cooling Systems - Solé Diesel

Keel cooler Sweet T – Voyages of a Nordhavn 40