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10-13-2014, 05:33 AM
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#21
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Guru
Join Date: Oct 2007
Posts: 22,553
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If I need hot water, just run the gen for 20min.
20 min may create hot water but even with a 250A charging system it wont do much for the house batts.
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10-13-2014, 07:20 AM
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#22
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Guru
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,185
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Quote:
Originally Posted by Insequent
Torrid.
With engine heating loop and, if you have it, another loop via your hydronic heating unit. No generator required.
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Agreed. With our boat in BC heating via engine loop or genset is all we need. We could if desired hook up the hydronic heater loop. Replaced 20 gallon Seaward (junk construction) with a 17 gallon Torrid.
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10-13-2014, 07:30 AM
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#23
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Guru
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,185
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Quote:
Originally Posted by Boydster
Now that is an interesting question.
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The waste heat from a small genset cannot match the main engine waste heat and genset impellers are usually a lower head unit than what one would see on a main engine.
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10-15-2014, 04:49 PM
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#24
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Veteran Member
City: cape charles
Vessel Model: Heritage East 36
Join Date: Jan 2013
Posts: 36
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I replaced mine last winter with a 6 gal. Raritan with engine loop. Had a small problem with the 180 engine temp tripping the reset breaker after a run. Raritan was very good with replacement of the breaker AND follow-up after installation. I had a valve installed at the engine to cut off the loop easily, as the 180 water is too hot and the unit recovers in about 15 min. on A/C power. If I had it to do over, I would not have replaced with the heat exchanger option-I only did cause the old unit had it & was already plumbed for it. Could have saved about $100 bucks & I really don't plan on using the loop-only in a pinch. I am very happy with the unit.
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10-16-2014, 05:02 AM
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#25
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Guru
Join Date: Oct 2007
Posts: 22,553
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>as the 180 water is too hot<
That is why folks install scald prevention devices.
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10-16-2014, 06:11 AM
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#26
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Newbie
City: North Kingstown
Vessel Name: Sandra Gale
Vessel Model: Albin 36
Join Date: Mar 2014
Posts: 2
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Water Heaters
I installed a Quick Nautic Boiler water heater in my last boat. Stainless tank, urethane insulation, high efficiency heat exchanger. This was a nice unit for a reasonable price. It's worth taking a look to see if it meets your needs.
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10-16-2014, 08:14 PM
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#28
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Senior Member
City: Kent Island
Vessel Name: Sundowner
Vessel Model: Gulfstar 36 MrkII
Join Date: Jul 2012
Posts: 234
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Torrid! I have a Torrid manufactured 10 gallon water heater on my boat that still cranks out the hot water. According to them the serial number dates to 1985! The only thing I have done is to replace a leaky T&P valve.
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10-16-2014, 09:06 PM
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#29
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Guru
City: NARBONNE
Vessel Name: 'Snow Mouse.'
Vessel Model: BROOM FLYBRIDGE 42.
Join Date: Apr 2014
Posts: 1,733
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There's a UK company which selsl fully insulated double coil copper cylinder calorifiers with 1kw immersion elements in various sizes specifically designed for marine use.
They are asapsupplies.co.uk,
I appreciate there are shipping charges to consider, but when you've just spent zillions on your pride and joy what's a few more bucks in comparison for the comfort ?
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10-16-2014, 10:02 PM
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#30
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Guru
City: South FL
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,607
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__________________
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
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10-17-2014, 05:33 AM
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#31
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Guru
Join Date: Oct 2007
Posts: 22,553
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1kw immersion elements in various sizes specifically designed for marine use.
I have always thought that the units should be built with 3 locations for electric use.
A BIG element for living big with 240V 50A service , a 700W unit for 120V and a simple plugin and a 50W element in 12V for use after the wind or solar has topped up the batts , so power would be >free<.
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10-17-2014, 07:43 AM
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#32
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,681
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Quote:
Originally Posted by Gulfstar 36
Torrid! I have a Torrid manufactured 10 gallon water heater on my boat that still cranks out the hot water. According to them the serial number dates to 1985! The only thing I have done is to replace a leaky T&P valve.
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We had the same one and loved it. Change or replace the anode. You may get another 30 years out of it.
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10-17-2014, 07:32 PM
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#33
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Guru
City: Warwick, RI
Vessel Name: Susan Helena
Vessel Model: Albin40
Join Date: Oct 2014
Posts: 523
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Maybe the Isotemp spa I have is a copy. It also comes with the mixing valve to adjust water temp and the same arrangement of fittings.
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10-17-2014, 08:57 PM
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#34
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Senior Member
City: Erie PA
Vessel Name: Endless Endeavor
Vessel Model: Custom
Join Date: Dec 2012
Posts: 225
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I installed a 20 gallon tank with extra insulation on it. It will stays hot for over 24 hrs if I'm not using it.
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10-18-2014, 10:20 AM
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#35
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Senior Member
City: Great Lakes
Vessel Name: NONE
Vessel Model: NONE
Join Date: Jan 2013
Posts: 448
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Timely topic! I am also in the market for a hot water heater, I noticed the other day my 6yr old 12gaI Raritan is Leaking out the bottom from somewhere. Does it ever end!!!! There is however some reaIIy good ideas here! I think an electric unit with the Loop connected to the genny (not main engine) and a tempering valve makes perfect sense and I confess I wouId never have thought of it. Seems to me that if you are running the genny "anyway" to make power to heat the water, why not recover some of that otherwise Lost genny heat to heIp heat the tank. I'm aIso going to put in a bypass as was suggested but the plan is to use both heat sources simultaneous not "either/or" . Difficult to say the net effect but does it reaIIy matter, you either recover some of this Iost heat or you don't. The onIy probIem I see is the possibility that the genny could actuaIIy work against the electric elements and cooI the tank until it warmed up.
(appoIogies for incorrectly using the Ietter I everywhere, the L on my keypad is kaput)
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10-20-2014, 12:30 PM
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#37
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Guru
City: NARBONNE
Vessel Name: 'Snow Mouse.'
Vessel Model: BROOM FLYBRIDGE 42.
Join Date: Apr 2014
Posts: 1,733
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N4712.
We have recently purchased a 42' ex hire boat cruiser which we're refurbishing and just today we ordered a 75 litre tank from asap-supplies.
Our experience on a previous unit is that the copper/polyurethane tank with the anti-scald mixer valve holds the heat much better than a stainless one with heavy fibreglass wrap, the height of the tank should also be level with the engine (if possible) to stop thermal convection.
Hot water is via the engine loop, the 1kw immersion heater we can run off either shore power or 4KW inverter via domestic battery bank/solar panels.
Everyone adapts to their own cruising pattern and we found this the best combination that suits us.
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10-21-2014, 05:12 AM
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#38
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Guru
Join Date: Oct 2007
Posts: 22,553
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the height of the tank should also be level with the engine (if possible) to stop thermal convection.
Interesting concept!
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10-21-2014, 06:47 AM
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#39
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Guru
City: South FL
Vessel Name: Oliver
Vessel Model: Nordhavn 47 Hull# 12
Join Date: Apr 2013
Posts: 3,607
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Quote:
Originally Posted by Irish Rambler
N4712.
We have recently purchased a 42' ex hire boat cruiser which we're refurbishing and just today we ordered a 75 litre tank from asap-supplies.
Our experience on a previous unit is that the copper/polyurethane tank with the anti-scald mixer valve holds the heat much better than a stainless one with heavy fibreglass wrap, the height of the tank should also be level with the engine (if possible) to stop thermal convection.
Hot water is via the engine loop, the 1kw immersion heater we can run off either shore power or 4KW inverter via domestic battery bank/solar panels.
Everyone adapts to their own cruising pattern and we found this the best combination that suits us.
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Rambler thanks for the info.
Our current water heater is still chugging along so we're going leave it alone till it decides it wants to leak.
We'll probably go with an American MFG for the sake of ease of installation.
__________________
Thanks, Oliver
M/V Oliver
Nordhavn 47 Hull #12
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10-21-2014, 01:04 PM
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#40
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Senior Member
City: Kent Island
Vessel Name: Sundowner
Vessel Model: Gulfstar 36 MrkII
Join Date: Jul 2012
Posts: 234
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The guy from Torrid was worried that it I try to change the anode after all these years it just might kill it.
Quote:
Originally Posted by Larry M
We had the same one and loved it. Change or replace the anode. You may get another 30 years out of it.
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