05/12/2012 05:11:50 PM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Do houseboats use hotwater heaters with heat exchangers that will make hot water from either 110V or from engine exhaust water?
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Never wrecked a boat while awake or sober
Kemah, Tx. - Galveston Bay
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05/12/2012 05:27:18 PM
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jtalberts
Member
Posts: 137
Joined: 11/23/2011
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I have a small 30 gallon 120V hot water tank on mine. It isn't hooked up, but when we overnight I plan on using it.
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05/12/2012 08:17:59 PM
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Amelia
Admiral
Posts: 522
Joined: 02/03/2007
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We're about to install a small propane on-demand water heater. It'll be interesting to see how that works. When the world was new and all, at least half a century ago, we had one for instant, unlimited, and very hot water in our little travel-trailer that worked most splendidly, and these days there's no pilot light to fuss with. If it works, we'll be very pleased to report, but it won't be this week's bragging.
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Amelia
Edenton, NC
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05/13/2012 04:55:39 AM
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42gibson
Member
Posts: 144
Joined: 11/19/2010
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we have a small 12 gal 120 volt trailer water heater in our gibson. it doesnt take up much room and with 4 people onboard we have never ran out of hot water. i've also had propane and they work just as good, they seem to heat the water quicker but all work fine.
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1991 gibson 44 executive
454's
norwich,ohio
docked on the good ole ohio river in marietta
Edited: 05/13/2012 at 04:57:53 AM by 42gibson
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05/13/2012 08:07:05 AM
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OLD HOUSEBOATER
Super moderator
Posts: 1520
Joined: 10/18/2002
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Tony
Most don't. This technology was popular on cruisers and trawlers in the past but has gone by the wayside due to cost and safety issues. The water gets a LOT hotter from engine circulation and is a reason for concern.
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OLD HOUSEBOATER
Edited: 05/13/2012 at 08:09:06 AM by OLD HOUSEBOATER
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05/13/2012 08:09:24 AM
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Dan
Member
Posts: 132
Joined: 07/10/2008
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Mine has a 20 gallon electric. Works great, plenty of hot water when it's just me. When the grand daughters stay we have to conserve a bit. The biggest issue is when on the hook you have to run the gen to have hot water.
Amelia, being in the construction industry, I will tell you that I would be doing exactly what you are planning.
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Dan
Lake Monroe
Bloomington, IN
1986 Gibson 50'
Twin 454's
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05/13/2012 08:09:27 AM
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Dan
Member
Posts: 132
Joined: 07/10/2008
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Mine has a 20 gallon electric. Works great, plenty of hot water when it's just me. When the grand daughters stay we have to conserve a bit. The biggest issue is when on the hook you have to run the gen to have hot water.
Amelia, being in the construction industry, I will tell you that I would be doing exactly what you are planning.
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Dan
Lake Monroe
Bloomington, IN
1986 Gibson 50'
Twin 454's
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05/13/2012 08:58:55 AM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Dan
You can say that again. 
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Never wrecked a boat while awake or sober Kemah, Tx. - Galveston Bay
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05/13/2012 09:31:46 AM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Originally posted by: OLD HOUSEBOATER
Tony........... The water gets a LOT hotter from engine circulation and is a reason for concern.
It sure does get HOT!!!!. My small unit gets scarey hot. It can remove flesh. On the up side - it stays very hot most of the day and you need so little of the hot water side diluted with the cold water to make the shower tolerable so in our case it works out good on the sailboat with just a small 37HP diesel. I was concerned about the safety factor with larger motors and more water output how much of a danger would it be.
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Never wrecked a boat while awake or sober Kemah, Tx. - Galveston Bay
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05/13/2012 10:06:32 AM
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campo5474
Member
Posts: 184
Joined: 05/09/2007
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I have an on-demand propane water heater on my boat and I love it. My wife and I have five kids and with their friends and our friends we never have to worry about running out of hot water again. It works Great!!!!!
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Sincerely,
Jason
Miss Sandi
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05/13/2012 10:26:20 AM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Originally posted by: campo5474
I have an on-demand propane water heater on my boat and I love it. ....!
I know nothing about them. If 2 people were to live aboard, how long would a 40 lb tank last?
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Never wrecked a boat while awake or sober Kemah, Tx. - Galveston Bay
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05/13/2012 10:37:58 AM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Originally posted by: campo5474
I have an on-demand propane water heater on my boat and I love it........ q]
What are some manufacturers brand names and where can I get one?
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Never wrecked a boat while awake or sober
Kemah, Tx. - Galveston Bay
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05/13/2012 10:49:18 AM
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Amelia
Admiral
Posts: 522
Joined: 02/03/2007
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The lovely thing about on-demand water heaters is that they heat the water as it's being used. Comes out of the spigot hot, and stays that way until you've used the last of the cold water you brought along. Look, Ma, no hot water tank. When storage space is at a premium, that's a lot of cupboard freed up.
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Amelia
Edenton, NC
Edited: 05/13/2012 at 10:49:59 AM by Amelia
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05/13/2012 11:15:29 AM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Do these "on Demand" water heaters have some kind of electronic ignition that automatically kicks in when needed or do you have to have a continuous pilot light?
Any guesstimates on gas consumption?
I know when we had a small 11 lb. bottle and all we did was cook with it, it would last over a month. Thats the kind of guesstimating I was hoping to get.
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Never wrecked a boat while awake or sober
Kemah, Tx. - Galveston Bay
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05/13/2012 12:03:43 PM
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Amelia
Admiral
Posts: 522
Joined: 02/03/2007
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The one we have (as yet still in the box) has piezo electric ignition-- runs on a small battery, AA, IIRC. Turning on the hot water faucet fires it up, I believe, and within seconds, you have very hot water. I hope to be an expert on the subject within the next month...
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Amelia
Edenton, NC
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05/13/2012 12:06:27 PM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Great
I would like a complete report. LOL
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Never wrecked a boat while awake or sober
Kemah, Tx. - Galveston Bay
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05/14/2012 09:30:12 PM
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campo5474
Member
Posts: 184
Joined: 05/09/2007
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OK, I bought mine on Ebay. I have a 25 gallon tank on my boat. With my propoane stove, fireplace, and water heater I usually have to fill it once a year. The heater has an electronic ignition and no pilot light. I actually mounted mine on the exterior wall under my Swim Slide. I think the manufacturer I have is Rinai or something like that. I had it for almost 2 years and it works great!!!!
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Sincerely,
Jason
Miss Sandi
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05/15/2012 09:49:13 PM
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FranticallyRelaxing
Admiral
Posts: 370
Joined: 09/10/2006
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Our boat has a basic 6-gallon RV water heater. It's the one that came with the boat, 24 years old and still works fine. It stays on all summer. It probably uses 2 gallons of propane a month. If that.
We're going to get an on-demand water heater too. And soon!
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 1988 SkipperLiner 53x14 1995 Tracker Party Cruiser 32 *for sale* 2003 Chaparral 260 SSI 2000 Allegro Bus 40' DP
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05/16/2012 03:18:25 PM
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Searover
Member
Posts: 35
Joined: 08/10/2011
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I have a Excel on demand heater and it works great. Never have to worry about running out of hot water.
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05/16/2012 07:04:22 PM
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TonyB
Admiral
Posts: 218
Joined: 09/05/2011
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Unless I am looking in the wrong places these things cost in excess of 1 Kilobuck.
For that price, I could live with a small tank.
Hope I am wrong.
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Never wrecked a boat while awake or sober
Kemah, Tx. - Galveston Bay
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