water heater options

Discussion in 'Beard Marine Vendor Forum' started by Marksearay, Oct 27, 2019.

  1. Marksearay

    Marksearay New Member

    Sep 6, 2018
    Orange beach Alabama
    1999 da500
    Im in the process of replacing a 20 gal water heater. currently 240v. Has anyone had experience with tankless? Is this a viable option. pros..cons? Any other options? Marine rariton heater is of course more expensive. Saltwater environment. Comments?
  2. b_arrington

    b_arrington Well-Known Member GOLD Sponsor

    Feb 21, 2007
    Setauket, NY
    2018 Back Cove 34
    Cummins QSB 6.7 480
    What's the heat source for a tankless heater?

    20 gallons is pretty big. You might be able to downsize to a 10-12 gallon for more efficient heating. Also many tanks are 120v.

    What you do you mean by "salt water environment"? Do you have a raw water cooled engine that doesn't use an antifreeze coolant loop to deliver heat to the hot water heater? My boats with hot water have both had such as setup to use engine heat to provide domestic hot water when AC power is not available. Also, I'd think a boat your size has a generator as well.
  3. hottoddie

    hottoddie Well-Known Member

    Jan 11, 2012
    Boston/Cape Cod
    1986 Sea Ray 390 EC
    Garmin 4212 Chartplotter
    Garmin 24 HD Radar
    Garmin 546s Plotter
    454 Crusaders
    I would think the tankless would have such a high amp draw as to overtax your shore power or generator capacities. I assume your boat has a 20 gallon tank so to hot water sources can be used at the same time. A tankless that could provide that much hot water would have a very high amp draw.
  4. Handsome Transom

    Handsome Transom Active Member GOLD Sponsor

    Jan 26, 2018
    Penetanguishene Ontario Canada
    1989 SeaRay Sundancer 268 454 Bravo
    454 Mercruiser bravo drive
    If you have a propane system with the requisite vented locker for the tank you might consider a tankless propane unit if there is space to install and vent it properly. Paloma and Bosch are both good units I have used in off grid applications , I do not know if they have any marine specific units
    Marksearay likes this.
  5. bahamabreisus

    bahamabreisus Well-Known Member

    Oct 25, 2007
    Hampstead NC
    500 dancer, previous 420,390,300 dancers
    detriot 8v92
    Tankless units pull a lot of amps, we just replaced ours with a Kuhma 20 gal 240 volt. Available at most boat stores

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