>… so the more flow the cooler it gets.. On Calypso we went overkill for domestic hot water as we wanted to cruise 3 seasons in the PNW. We use our Webasto diesel furnace as a boiler supplying hot water to a Everhot water heater. The domestic water flows through 4 to 5 gallons of very hot water in copper tubing. When the system is running at full speed we can supply as much hot water as there is water in the tanks. The system is heavy and requires extra space but it has been reliable and worth the effort. Even in summer there have been times it was nice to take the chill off the cabin at the same time as making hot water for dishes. We do have a “summer” valve that directs the boiler output only to the Everhot keeping the cabin heat exchangers cool.
We also have an engine/110 heater 4 gallon hot water heater to make use of the engine’s waste heat. Our domestic water manifold allows us to direct the flow of cold water based on which system is being used. If we decide to take the boat back to a pure race boat much of the cabin and domestic water heating system would need to be removed to save weight. Martin DeYoung Calypso 1971 C&C 43 Seattle [Description: Description: cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F] From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Jim Watts via CnC-List Sent: Wednesday, September 02, 2015 1:04 PM To: 1 CnC List Cc: Jim Watts Subject: Re: Stus-List Hot water tank The big downside to the instant water heaters, besides the electrical draw, is the total temperature rise. That unit provides a 32 degree temp rise at .35 gpm, dropping to 24 degree rise at .5 gpm, so the more flow the cooler it gets. So you can get the water from 60 to 92 if you can live with a quart a minute flow. Try that at home and see if you like it... Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC
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