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Old 08-29-2014, 05:33 AM   #41
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WE wash at the laundromat when cruising as it is the least hassle.

But the bride uses cold water , so the size of the HW heater would not be an issue.

Dishwasher might be a different HW requirement tho.

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Old 08-30-2014, 04:40 PM   #42
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Complaints you will never hear:

We've got too much hot water.

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Old 08-30-2014, 05:29 PM   #43
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No but run out of hot with a big water heater and only 120V to reheat and the recovery time can make having hot water again an eternity...

Too big a heater is just as bad as too small of one if you don't still plan a little bit.

And please don't take my word on it...there's countless pages of debate on it in the RV forums (maybe a little in the boating world but I haven't seen as much)...it's the same issue there. The debate on recovery time versus total gallons is a lot more evenly split.
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Old 08-30-2014, 07:59 PM   #44
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City: Pittwater
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I agree with the psneeld on this.

I changed a hot water system a while back and because of other modifications I had made in the ER I had to downsize to a smaller unit. At first I was not happy having to do this , however after using the new unit I realised the benefits of a quick recovery outweighed the larger capacity of the older unit with its greater down time.

As usual it's horses for courses.

By the way there is more information in the archives on this subject for anyone interested.
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Old 08-31-2014, 01:13 PM   #45
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Originally Posted by BandB View Post
Complaints you will never hear:

We've got too much hot water.

I had a 40 gallon household W/H on my boat, electric only with no heat exchanger. Well insulated with a blanket. Plenty of hot (and then warmish) water for a days of cruising without having to turn on the genset.

If I had to do it again, I would buy another large, domestic unit designed for solar purposes (built in heat exchange loop) and not spend the money on a marine unit. Of course have to add the insulation blankets.
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Old 09-01-2014, 04:57 AM   #46
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Rheem makes GRP tanks that do not rust out and claim to loose only 5 deg F in 24 hours .

WE use a 50G in out home and it seems fine.

Any HW tank can now be converted to a heat exchanger style with an aftermarket kit.

Get the double wall style anti-freez can kill.

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hot water heater

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