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Old 08-02-2019, 05:48 AM   #5
O C Diver
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City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
I put Heatercraft hot water surface mount heaters in the forward stateroom, saloon, and pilothouse. The loop runs off the engine cooling system and produces adequate heat down to about 32 degrees outside temperature while the engine is burning 2 GPH. Forward stateroom heat is a little marginal as it's the last heater in the loop and the room is surrounded by cold water. For each heater I installed a thermostat that controls the blower motor for room temperature control. I also added a 12 VDC circulator pump to increase flow rate around the loop. The system would probably work much better in cold temperatures if I was burning 3 to 4 GPH. I believe the engine thermostat is probably closed when all 3 heaters are running.

With a little engineering, a system like that should be able to run off your engine or a diesel boiler.

Ted
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