Hydronic Heating System

From Jim Turner
“Makana Kai”, 2000 C380, #227

Zoned hydronic heating system with three zones (thermostats).  One each in the Salon, Vberth, and owners cabin.  We turn the master toggle switch on at night before going to bed, and in the morning only need to reach up and move a thermostat to begin heating the boat.

Installed tightly in starboard side of aft locker.

I built and tightly fitting a strong aluminum shelf. Prior to installing the shelf in the boat, I preliminarily installed the heater unit, and the main coolant tank, along with the coolant filter unit vertically. I also installed the overflow tank above it, and an additional buffer tank aft of it outside the starboard stern locker enclosure (almost doubling the systems coolant to reduce short cycling). This assembly is very compact and uses little of the lockers usable storage space. I installed a 4 inch stainless

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